From cde366b5cd9bf5d4d202ac303d71e6f7590a7bb6 Mon Sep 17 00:00:00 2001
From: James Jackson-South <james_south@hotmail.com>
Date: Fri, 17 Apr 2026 21:55:14 +1000
Subject: [PATCH] Remove premature rounding during normalization

---
 .../Jpeg/Components/Block8x8F.Vector128.cs    | 40 +++++-----
 .../Jpeg/Components/Block8x8F.Vector256.cs    | 26 +++---
 .../Formats/Jpeg/Components/Block8x8F.cs      | 79 +++++++------------
 .../DirectComponentProcessor.cs               |  8 +-
 .../Jpeg/Components/ScaledFloatingPointDCT.cs | 14 ++--
 .../Formats/Jpg/Block8x8FTests.cs             | 71 -----------------
 .../ImageSharp.Tests/Formats/Jpg/DCTTests.cs  | 10 +--
 .../Formats/Jpg/JpegDecoderTests.Baseline.cs  |  2 +-
 .../Jpg/JpegDecoderTests.Progressive.cs       |  2 +-
 .../Formats/Jpg/JpegEncoderTests.cs           |  2 +-
 .../Formats/Tiff/TiffDecoderTests.cs          | 14 ++--
 ...ToReferenceOutput_Rgba32_forest_bridge.png |  4 +-
 ...ToReferenceOutput_Rgba32_forest_bridge.png |  4 +-
 .../DecodeBaselineJpeg_Calliphora.png         |  4 +-
 ...Issue394-MultiHuffmanBaseline-Speakers.png |  4 +-
 ...codeBaselineJpeg_MultiScanBaselineCMYK.png |  4 +-
 .../DecodeBaselineJpeg_badeof.png             |  4 +-
 .../DecodeBaselineJpeg_badrst.png             |  4 +-
 .../DecodeBaselineJpeg_cmyk.png               |  4 +-
 .../DecodeBaselineJpeg_jpeg420small.png       |  4 +-
 .../DecodeBaselineJpeg_jpeg422.png            |  4 +-
 .../DecodeBaselineJpeg_jpeg444.png            |  4 +-
 .../DecodeBaselineJpeg_testorig.png           |  4 +-
 .../DecodeBaselineJpeg_testorig12.png         |  4 +-
 ...DecodeBaselineJpeg_ycck-subsample-1222.png |  4 +-
 .../DecodeBaselineJpeg_ycck.png               |  4 +-
 ...ecodeProgressiveJpeg_BadEofProgressive.png |  4 +-
 .../DecodeProgressiveJpeg_ExifUndefType.png   |  4 +-
 .../DecodeProgressiveJpeg_fb.png              |  4 +-
 .../DecodeProgressiveJpeg_progress.png        |  4 +-
 .../Decode_CMYK_ICC_Jpeg_Rgba32_issue-129.png |  4 +-
 ...GB_ICC_Jpeg_Rgba32_Momiji-AdobeRGB-yes.png |  4 +-
 ...GB_ICC_Jpeg_Rgba32_Momiji-AppleRGB-yes.png |  4 +-
 ..._ICC_Jpeg_Rgba32_Momiji-ColorMatch-yes.png |  4 +-
 ...GB_ICC_Jpeg_Rgba32_Momiji-ProPhoto-yes.png |  4 +-
 ...RGB_ICC_Jpeg_Rgba32_Momiji-WideRGB-yes.png |  4 +-
 ...de_RGB_ICC_Jpeg_Rgba32_Momiji-sRGB-yes.png |  4 +-
 ...B_ICC_Jpeg_Rgba32_Perceptual-cLUT-only.png |  4 +-
 .../Decode_RGB_ICC_Jpeg_Rgba32_Perceptual.png |  4 +-
 .../Decode_RGB_ICC_Jpeg_Rgba32_sRGB_Gray.png  |  4 +-
 ...Decode_YCCK_ICC_Jpeg_Rgba32_issue_2723.png |  4 +-
 ...code_Resize_Bicubic_Calliphora_150_150.png |  4 +-
 ...coder_Decode_Resize_Calliphora_150_150.png |  4 +-
 ...zed_Combined_Resize_Calliphora_150_150.png |  4 +-
 ...ialized_IDCT_Resize_Calliphora_150_150.png |  4 +-
 ...alized_Scale_Resize_Calliphora_150_150.png |  4 +-
 ...ecoder_CanDecode_Cmyk_Rgba32_Cmyk-jpeg.png |  4 +-
 ..._JpegCompressedWithIssue2679_Issue2679.png |  4 +-
 ..._CanDecode_YccK_ICC_Rgba32_Issue2454_A.png |  4 +-
 ..._CanDecode_YccK_ICC_Rgba32_Issue2454_B.png |  4 +-
 ...oder_CanDecode_YccK_Rgba32_Issue2454_A.png |  4 +-
 ...oder_CanDecode_YccK_Rgba32_Issue2454_B.png |  4 +-
 ...EntropyCrop_MultiScanBaselineCMYK_0.25.png |  4 +-
 ...EntropyCrop_MultiScanBaselineCMYK_0.75.png |  4 +-
 54 files changed, 175 insertions(+), 265 deletions(-)

diff --git a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Vector128.cs b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Vector128.cs
index d4c0398d97..a80dcf86e5 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Vector128.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Vector128.cs
@@ -13,31 +13,31 @@ namespace SixLabors.ImageSharp.Formats.Jpeg.Components;
 internal partial struct Block8x8F
 {
     /// <summary>
-    /// <see cref="Vector128{Single}"/> version of <see cref="NormalizeColorsInPlace(float)"/> and <see cref="RoundInPlace()"/>.
+    /// <see cref="Vector128{Single}"/> version of <see cref="NormalizeColorsInPlace(float)"/>.
     /// </summary>
     /// <param name="maximum">The maximum value to normalize to.</param>
     [MethodImpl(InliningOptions.ShortMethod)]
-    public void NormalizeColorsAndRoundInPlaceVector128(float maximum)
+    public void NormalizeColorsInPlaceVector128(float maximum)
     {
         Vector128<float> max = Vector128.Create(maximum);
         Vector128<float> off = Vector128.Ceiling(max * .5F);
 
-        this.V0L = NormalizeAndRoundVector128(this.V0L.AsVector128(), off, max).AsVector4();
-        this.V0R = NormalizeAndRoundVector128(this.V0R.AsVector128(), off, max).AsVector4();
-        this.V1L = NormalizeAndRoundVector128(this.V1L.AsVector128(), off, max).AsVector4();
-        this.V1R = NormalizeAndRoundVector128(this.V1R.AsVector128(), off, max).AsVector4();
-        this.V2L = NormalizeAndRoundVector128(this.V2L.AsVector128(), off, max).AsVector4();
-        this.V2R = NormalizeAndRoundVector128(this.V2R.AsVector128(), off, max).AsVector4();
-        this.V3L = NormalizeAndRoundVector128(this.V3L.AsVector128(), off, max).AsVector4();
-        this.V3R = NormalizeAndRoundVector128(this.V3R.AsVector128(), off, max).AsVector4();
-        this.V4L = NormalizeAndRoundVector128(this.V4L.AsVector128(), off, max).AsVector4();
-        this.V4R = NormalizeAndRoundVector128(this.V4R.AsVector128(), off, max).AsVector4();
-        this.V5L = NormalizeAndRoundVector128(this.V5L.AsVector128(), off, max).AsVector4();
-        this.V5R = NormalizeAndRoundVector128(this.V5R.AsVector128(), off, max).AsVector4();
-        this.V6L = NormalizeAndRoundVector128(this.V6L.AsVector128(), off, max).AsVector4();
-        this.V6R = NormalizeAndRoundVector128(this.V6R.AsVector128(), off, max).AsVector4();
-        this.V7L = NormalizeAndRoundVector128(this.V7L.AsVector128(), off, max).AsVector4();
-        this.V7R = NormalizeAndRoundVector128(this.V7R.AsVector128(), off, max).AsVector4();
+        this.V0L = NormalizeVector128(this.V0L.AsVector128(), off, max).AsVector4();
+        this.V0R = NormalizeVector128(this.V0R.AsVector128(), off, max).AsVector4();
+        this.V1L = NormalizeVector128(this.V1L.AsVector128(), off, max).AsVector4();
+        this.V1R = NormalizeVector128(this.V1R.AsVector128(), off, max).AsVector4();
+        this.V2L = NormalizeVector128(this.V2L.AsVector128(), off, max).AsVector4();
+        this.V2R = NormalizeVector128(this.V2R.AsVector128(), off, max).AsVector4();
+        this.V3L = NormalizeVector128(this.V3L.AsVector128(), off, max).AsVector4();
+        this.V3R = NormalizeVector128(this.V3R.AsVector128(), off, max).AsVector4();
+        this.V4L = NormalizeVector128(this.V4L.AsVector128(), off, max).AsVector4();
+        this.V4R = NormalizeVector128(this.V4R.AsVector128(), off, max).AsVector4();
+        this.V5L = NormalizeVector128(this.V5L.AsVector128(), off, max).AsVector4();
+        this.V5R = NormalizeVector128(this.V5R.AsVector128(), off, max).AsVector4();
+        this.V6L = NormalizeVector128(this.V6L.AsVector128(), off, max).AsVector4();
+        this.V6R = NormalizeVector128(this.V6R.AsVector128(), off, max).AsVector4();
+        this.V7L = NormalizeVector128(this.V7L.AsVector128(), off, max).AsVector4();
+        this.V7R = NormalizeVector128(this.V7R.AsVector128(), off, max).AsVector4();
     }
 
     /// <summary>
@@ -71,8 +71,8 @@ internal partial struct Block8x8F
     }
 
     [MethodImpl(InliningOptions.ShortMethod)]
-    private static Vector128<float> NormalizeAndRoundVector128(Vector128<float> value, Vector128<float> off, Vector128<float> max)
-        => Vector128_.RoundToNearestInteger(Vector128_.Clamp(value + off, Vector128<float>.Zero, max));
+    private static Vector128<float> NormalizeVector128(Vector128<float> value, Vector128<float> off, Vector128<float> max)
+        => Vector128_.Clamp(value + off, Vector128<float>.Zero, max);
 
     private static void MultiplyIntoInt16Vector128(ref Block8x8F a, ref Block8x8F b, ref Block8x8 dest)
     {
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Vector256.cs b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Vector256.cs
index 2aaf5c9431..f16452ed52 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Vector256.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.Vector256.cs
@@ -39,23 +39,23 @@ internal partial struct Block8x8F
 #pragma warning restore SA1310 // Field names should not contain underscore
 
     /// <summary>
-    /// <see cref="Vector256{Single}"/> version of <see cref="NormalizeColorsInPlace(float)"/> and <see cref="RoundInPlace()"/>.
+    /// <see cref="Vector256{Single}"/> version of <see cref="NormalizeColorsInPlace(float)"/>.
     /// </summary>
     /// <param name="maximum">The maximum value to normalize to.</param>
     [MethodImpl(InliningOptions.ShortMethod)]
-    public void NormalizeColorsAndRoundInPlaceVector256(float maximum)
+    public void NormalizeColorsInPlaceVector256(float maximum)
     {
         Vector256<float> max = Vector256.Create(maximum);
         Vector256<float> off = Vector256.Ceiling(max * .5F);
 
-        this.V256_0 = NormalizeAndRoundVector256(this.V256_0, off, max);
-        this.V256_1 = NormalizeAndRoundVector256(this.V256_1, off, max);
-        this.V256_2 = NormalizeAndRoundVector256(this.V256_2, off, max);
-        this.V256_3 = NormalizeAndRoundVector256(this.V256_3, off, max);
-        this.V256_4 = NormalizeAndRoundVector256(this.V256_4, off, max);
-        this.V256_5 = NormalizeAndRoundVector256(this.V256_5, off, max);
-        this.V256_6 = NormalizeAndRoundVector256(this.V256_6, off, max);
-        this.V256_7 = NormalizeAndRoundVector256(this.V256_7, off, max);
+        this.V256_0 = NormalizeVector256(this.V256_0, off, max);
+        this.V256_1 = NormalizeVector256(this.V256_1, off, max);
+        this.V256_2 = NormalizeVector256(this.V256_2, off, max);
+        this.V256_3 = NormalizeVector256(this.V256_3, off, max);
+        this.V256_4 = NormalizeVector256(this.V256_4, off, max);
+        this.V256_5 = NormalizeVector256(this.V256_5, off, max);
+        this.V256_6 = NormalizeVector256(this.V256_6, off, max);
+        this.V256_7 = NormalizeVector256(this.V256_7, off, max);
     }
 
     /// <summary>
@@ -95,10 +95,10 @@ internal partial struct Block8x8F
     }
 
     [MethodImpl(InliningOptions.ShortMethod)]
-    private static Vector256<float> NormalizeAndRoundVector256(Vector256<float> value, Vector256<float> off, Vector256<float> max)
-        => Vector256_.RoundToNearestInteger(Vector256_.Clamp(value + off, Vector256<float>.Zero, max));
+    private static Vector256<float> NormalizeVector256(Vector256<float> value, Vector256<float> off, Vector256<float> max)
+        => Vector256_.Clamp(value + off, Vector256<float>.Zero, max);
 
-    private static unsafe void MultiplyIntoInt16Vector256(ref Block8x8F a, ref Block8x8F b, ref Block8x8 dest)
+    private static void MultiplyIntoInt16Vector256(ref Block8x8F a, ref Block8x8F b, ref Block8x8 dest)
     {
         DebugGuard.IsTrue(Vector256.IsHardwareAccelerated, "Vector256 support is required to run this operation!");
 
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.cs b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.cs
index 49b519201f..19a695d07d 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Block8x8F.cs
@@ -132,7 +132,7 @@ internal partial struct Block8x8F : IEquatable<Block8x8F>
     /// </summary>
     /// <param name="dest">Destination</param>
     [MethodImpl(InliningOptions.ShortMethod)]
-    public unsafe void ScaledCopyTo(float[] dest)
+    public void ScaledCopyTo(float[] dest)
     {
         DebugGuard.MustBeGreaterThanOrEqualTo(dest.Length, Size, "dest is too small");
 
@@ -193,7 +193,7 @@ internal partial struct Block8x8F : IEquatable<Block8x8F>
     /// </summary>
     /// <param name="other">The other block.</param>
     [MethodImpl(InliningOptions.ShortMethod)]
-    public unsafe void MultiplyInPlace(ref Block8x8F other)
+    public void MultiplyInPlace(ref Block8x8F other)
     {
         if (Vector256.IsHardwareAccelerated)
         {
@@ -324,62 +324,43 @@ internal partial struct Block8x8F : IEquatable<Block8x8F>
     }
 
     /// <summary>
-    /// Level shift by +maximum/2, clip to [0..maximum], and round all the values in the block.
+    /// Level shift by +maximum/2, clip to [0, maximum]
     /// </summary>
-    /// <param name="maximum">The maximum value.</param>
-    public void NormalizeColorsAndRoundInPlace(float maximum)
+    /// <param name="maximum">The maximum value to normalize to.</param>
+    public void NormalizeColorsInPlace(float maximum)
     {
         if (Vector256.IsHardwareAccelerated)
         {
-            this.NormalizeColorsAndRoundInPlaceVector256(maximum);
+            this.NormalizeColorsInPlaceVector256(maximum);
+            return;
         }
         else if (Vector128.IsHardwareAccelerated)
         {
-            this.NormalizeColorsAndRoundInPlaceVector128(maximum);
+            this.NormalizeColorsInPlaceVector128(maximum);
+            return;
         }
         else
         {
-            this.NormalizeColorsInPlace(maximum);
-            this.RoundInPlace();
-        }
-    }
-
-    /// <summary>
-    /// Level shift by +maximum/2, clip to [0, maximum]
-    /// </summary>
-    /// <param name="maximum">The maximum value to normalize to.</param>
-    public void NormalizeColorsInPlace(float maximum)
-    {
-        Vector4 min = Vector4.Zero;
-        Vector4 max = new(maximum);
-        Vector4 off = new(MathF.Ceiling(maximum * 0.5F));
-
-        this.V0L = Vector4.Clamp(this.V0L + off, min, max);
-        this.V0R = Vector4.Clamp(this.V0R + off, min, max);
-        this.V1L = Vector4.Clamp(this.V1L + off, min, max);
-        this.V1R = Vector4.Clamp(this.V1R + off, min, max);
-        this.V2L = Vector4.Clamp(this.V2L + off, min, max);
-        this.V2R = Vector4.Clamp(this.V2R + off, min, max);
-        this.V3L = Vector4.Clamp(this.V3L + off, min, max);
-        this.V3R = Vector4.Clamp(this.V3R + off, min, max);
-        this.V4L = Vector4.Clamp(this.V4L + off, min, max);
-        this.V4R = Vector4.Clamp(this.V4R + off, min, max);
-        this.V5L = Vector4.Clamp(this.V5L + off, min, max);
-        this.V5R = Vector4.Clamp(this.V5R + off, min, max);
-        this.V6L = Vector4.Clamp(this.V6L + off, min, max);
-        this.V6R = Vector4.Clamp(this.V6R + off, min, max);
-        this.V7L = Vector4.Clamp(this.V7L + off, min, max);
-        this.V7R = Vector4.Clamp(this.V7R + off, min, max);
-    }
-
-    /// <summary>
-    /// Rounds all values in the block.
-    /// </summary>
-    public void RoundInPlace()
-    {
-        for (int i = 0; i < Size; i++)
-        {
-            this[i] = MathF.Round(this[i]);
+            Vector4 min = Vector4.Zero;
+            Vector4 max = new(maximum);
+            Vector4 off = new(MathF.Ceiling(maximum * 0.5F));
+
+            this.V0L = Vector4.Clamp(this.V0L + off, min, max);
+            this.V0R = Vector4.Clamp(this.V0R + off, min, max);
+            this.V1L = Vector4.Clamp(this.V1L + off, min, max);
+            this.V1R = Vector4.Clamp(this.V1R + off, min, max);
+            this.V2L = Vector4.Clamp(this.V2L + off, min, max);
+            this.V2R = Vector4.Clamp(this.V2R + off, min, max);
+            this.V3L = Vector4.Clamp(this.V3L + off, min, max);
+            this.V3R = Vector4.Clamp(this.V3R + off, min, max);
+            this.V4L = Vector4.Clamp(this.V4L + off, min, max);
+            this.V4R = Vector4.Clamp(this.V4R + off, min, max);
+            this.V5L = Vector4.Clamp(this.V5L + off, min, max);
+            this.V5R = Vector4.Clamp(this.V5R + off, min, max);
+            this.V6L = Vector4.Clamp(this.V6L + off, min, max);
+            this.V6R = Vector4.Clamp(this.V6R + off, min, max);
+            this.V7L = Vector4.Clamp(this.V7L + off, min, max);
+            this.V7R = Vector4.Clamp(this.V7R + off, min, max);
         }
     }
 
@@ -533,7 +514,7 @@ internal partial struct Block8x8F : IEquatable<Block8x8F>
     }
 
     /// <inheritdoc />
-    public bool Equals(Block8x8F other)
+    public readonly bool Equals(Block8x8F other)
         => this.V0L == other.V0L
         && this.V0R == other.V0R
         && this.V1L == other.V1L
diff --git a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ComponentProcessors/DirectComponentProcessor.cs b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ComponentProcessors/DirectComponentProcessor.cs
index 79e25a67a9..b4399a69cd 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/Decoder/ComponentProcessors/DirectComponentProcessor.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/Decoder/ComponentProcessors/DirectComponentProcessor.cs
@@ -53,10 +53,10 @@ internal sealed class DirectComponentProcessor : ComponentProcessor
                 // Convert from spectral to color
                 FloatingPointDCT.TransformIDCT(ref workspaceBlock);
 
-                // To conform better to libjpeg we actually NEED TO loose precision here.
-                // This is because they store blocks as Int16 between all the operations.
-                // To be "more accurate", we need to emulate this by rounding!
-                workspaceBlock.NormalizeColorsAndRoundInPlace(maximumValue);
+                // Normalize into the component sample range without quantizing away
+                // fractional precision. The later color conversion / final pack stage
+                // performs the only rounding we actually need for output samples.
+                workspaceBlock.NormalizeColorsInPlace(maximumValue);
 
                 // Write to color buffer acording to sampling factors
                 int xColorBufferStart = xBlock * this.BlockAreaSize.Width;
diff --git a/src/ImageSharp/Formats/Jpeg/Components/ScaledFloatingPointDCT.cs b/src/ImageSharp/Formats/Jpeg/Components/ScaledFloatingPointDCT.cs
index b8234ff3e4..b4d32f7095 100644
--- a/src/ImageSharp/Formats/Jpeg/Components/ScaledFloatingPointDCT.cs
+++ b/src/ImageSharp/Formats/Jpeg/Components/ScaledFloatingPointDCT.cs
@@ -136,10 +136,10 @@ internal static class ScaledFloatingPointDCT
                    (z4 * FP32_2_562915447);
 
             // Save results to the top left 4x4 subregion
-            block[(ctr * 8) + 0] = MathF.Round(Numerics.Clamp(((tmp10 + tmp2) * 0.5F) + normalizationValue, 0, maxValue));
-            block[(ctr * 8) + 3] = MathF.Round(Numerics.Clamp(((tmp10 - tmp2) * 0.5F) + normalizationValue, 0, maxValue));
-            block[(ctr * 8) + 1] = MathF.Round(Numerics.Clamp(((tmp12 + tmp0) * 0.5F) + normalizationValue, 0, maxValue));
-            block[(ctr * 8) + 2] = MathF.Round(Numerics.Clamp(((tmp12 - tmp0) * 0.5F) + normalizationValue, 0, maxValue));
+            block[(ctr * 8) + 0] = Numerics.Clamp(((tmp10 + tmp2) * 0.5F) + normalizationValue, 0, maxValue);
+            block[(ctr * 8) + 3] = Numerics.Clamp(((tmp10 - tmp2) * 0.5F) + normalizationValue, 0, maxValue);
+            block[(ctr * 8) + 1] = Numerics.Clamp(((tmp12 + tmp0) * 0.5F) + normalizationValue, 0, maxValue);
+            block[(ctr * 8) + 2] = Numerics.Clamp(((tmp12 - tmp0) * 0.5F) + normalizationValue, 0, maxValue);
         }
     }
 
@@ -199,8 +199,8 @@ internal static class ScaledFloatingPointDCT
                    (block[ctr + (8 * 1) + 2] * FP32_3_624509785);
 
             // Save results to the top left 2x2 subregion
-            block[(ctr * 8) + 0] = MathF.Round(Numerics.Clamp(((tmp10 + tmp0) * 0.25F) + normalizationValue, 0, maxValue));
-            block[(ctr * 8) + 1] = MathF.Round(Numerics.Clamp(((tmp10 - tmp0) * 0.25F) + normalizationValue, 0, maxValue));
+            block[(ctr * 8) + 0] = Numerics.Clamp(((tmp10 + tmp0) * 0.25F) + normalizationValue, 0, maxValue);
+            block[(ctr * 8) + 1] = Numerics.Clamp(((tmp10 - tmp0) * 0.25F) + normalizationValue, 0, maxValue);
         }
     }
 
@@ -213,6 +213,6 @@ internal static class ScaledFloatingPointDCT
     /// <param name="normalizationValue">Output range normalization value, 1/2 of the <paramref name="maxValue"/>.</param>
     /// <param name="maxValue">Maximum value of the output range.</param>
     public static float TransformIDCT_1x1(float dc, float dequantizer, float normalizationValue, float maxValue)
-        => MathF.Round(Numerics.Clamp((dc * dequantizer) + normalizationValue, 0, maxValue));
+        => Numerics.Clamp((dc * dequantizer) + normalizationValue, 0, maxValue);
 }
 #pragma warning restore IDE0078
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/Block8x8FTests.cs b/tests/ImageSharp.Tests/Formats/Jpg/Block8x8FTests.cs
index 368a7b3692..544ac85a51 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/Block8x8FTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/Block8x8FTests.cs
@@ -181,54 +181,6 @@ public partial class Block8x8FTests : JpegFixture
         }
     }
 
-    [Theory]
-    [InlineData(1)]
-    [InlineData(2)]
-    public void NormalizeColorsAndRoundVector256(int seed)
-    {
-        if (this.SkipOnNonVector256Runner())
-        {
-            return;
-        }
-
-        Block8x8F source = CreateRandomFloatBlock(-200, 200, seed);
-
-        Block8x8F expected = source;
-        expected.NormalizeColorsInPlace(255);
-        expected.RoundInPlace();
-
-        Block8x8F actual = source;
-        actual.NormalizeColorsAndRoundInPlaceVector256(255);
-
-        this.Output.WriteLine(expected.ToString());
-        this.Output.WriteLine(actual.ToString());
-        this.CompareBlocks(expected, actual, 0);
-    }
-
-    [Theory]
-    [InlineData(1)]
-    [InlineData(2)]
-    public void NormalizeColorsAndRoundVector128(int seed)
-    {
-        if (this.SkipOnNonVector128Runner())
-        {
-            return;
-        }
-
-        Block8x8F source = CreateRandomFloatBlock(-200, 200, seed);
-
-        Block8x8F expected = source;
-        expected.NormalizeColorsInPlace(255);
-        expected.RoundInPlace();
-
-        Block8x8F actual = source;
-        actual.NormalizeColorsAndRoundInPlaceVector128(255);
-
-        this.Output.WriteLine(expected.ToString());
-        this.Output.WriteLine(actual.ToString());
-        this.CompareBlocks(expected, actual, 0);
-    }
-
     [Theory]
     [InlineData(1, 2)]
     [InlineData(2, 1)]
@@ -290,29 +242,6 @@ public partial class Block8x8FTests : JpegFixture
         }
     }
 
-    [Theory]
-    [InlineData(1)]
-    [InlineData(2)]
-    [InlineData(3)]
-    public void RoundInPlaceSlow(int seed)
-    {
-        Block8x8F s = CreateRandomFloatBlock(-500, 500, seed);
-
-        Block8x8F d = s;
-        d.RoundInPlace();
-
-        this.Output.WriteLine(s.ToString());
-        this.Output.WriteLine(d.ToString());
-
-        for (int i = 0; i < 64; i++)
-        {
-            float expected = (float)Math.Round(s[i]);
-            float actual = d[i];
-
-            Assert.Equal(expected, actual);
-        }
-    }
-
     [Fact]
     public void MultiplyInPlace_ByOtherBlock()
     {
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/DCTTests.cs b/tests/ImageSharp.Tests/Formats/Jpg/DCTTests.cs
index 50eada4c7c..83c3a344da 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/DCTTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/DCTTests.cs
@@ -193,7 +193,7 @@ public static class DCTTests
             {
                 for (int x = 0; x < 4; x++)
                 {
-                    AssertScaledElementEquality(expectedSpan.Slice((y * 16) + (x * 2)), actualSpan.Slice((y * 8) + x));
+                    AssertScaledElementEquality(expectedSpan[((y * 16) + (x * 2))..], actualSpan[((y * 8) + x)..]);
                 }
             }
 
@@ -210,7 +210,7 @@ public static class DCTTests
                     }
                 }
 
-                average2x2 = MathF.Round(average2x2 / 4f);
+                average2x2 /= 4f;
 
                 Assert.Equal((int)average2x2, (int)actual[0]);
             }
@@ -254,7 +254,7 @@ public static class DCTTests
             {
                 for (int x = 0; x < 2; x++)
                 {
-                    AssertScaledElementEquality(expectedSpan.Slice((y * 32) + (x * 4)), actualSpan.Slice((y * 8) + x));
+                    AssertScaledElementEquality(expectedSpan[((y * 32) + (x * 4))..], actualSpan[((y * 8) + x)..]);
                 }
             }
 
@@ -271,7 +271,7 @@ public static class DCTTests
                     }
                 }
 
-                average4x4 = MathF.Round(average4x4 / 16f);
+                average4x4 /= 16f;
 
                 Assert.Equal((int)average4x4, (int)actual[0]);
             }
@@ -311,7 +311,7 @@ public static class DCTTests
                 NormalizationValue,
                 MaxOutputValue);
 
-            float expected = MathF.Round(Numerics.Clamp(expectedDest[0] + NormalizationValue, 0, MaxOutputValue));
+            float expected = Numerics.Clamp(expectedDest[0] + NormalizationValue, 0, MaxOutputValue);
 
             Assert.Equal((int)actual, (int)expected);
         }
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Baseline.cs b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Baseline.cs
index f147e41325..e7e6d20334 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Baseline.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Baseline.cs
@@ -30,7 +30,7 @@ public partial class JpegDecoderTests
             }
 
             using Image<TPixel> image = provider.GetImage(JpegDecoder.Instance);
-            image.DebugSave(provider, testOutputDetails: nonContiguousBuffersStr);
+            image.DebugSave(provider, testOutputDetails: nonContiguousBuffersStr, appendPixelTypeToFileName: false);
 
             provider.Utility.TestName = DecodeBaselineJpegOutputName;
             image.CompareToReferenceOutput(
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Progressive.cs b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Progressive.cs
index a5472e1aef..fff1e085b3 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Progressive.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/JpegDecoderTests.Progressive.cs
@@ -21,7 +21,7 @@ public partial class JpegDecoderTests
         where TPixel : unmanaged, IPixel<TPixel>
     {
         using Image<TPixel> image = provider.GetImage(JpegDecoder.Instance);
-        image.DebugSave(provider);
+        image.DebugSave(provider, appendPixelTypeToFileName: false);
 
         provider.Utility.TestName = DecodeProgressiveJpegOutputName;
         image.CompareToReferenceOutput(
diff --git a/tests/ImageSharp.Tests/Formats/Jpg/JpegEncoderTests.cs b/tests/ImageSharp.Tests/Formats/Jpg/JpegEncoderTests.cs
index ede147dbe9..5fae85cc85 100644
--- a/tests/ImageSharp.Tests/Formats/Jpg/JpegEncoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Jpg/JpegEncoderTests.cs
@@ -49,7 +49,7 @@ public partial class JpegEncoderTests
 
     public static readonly TheoryData<JpegColorType, int, float> CmykEncodingSetups = new()
     {
-        { JpegColorType.Cmyk, 100, 0.0159f / 100 },
+        { JpegColorType.Cmyk, 100, 0.0164f / 100 },
         { JpegColorType.Cmyk, 80,  0.3922f / 100 },
         { JpegColorType.Cmyk, 40,  0.6488f / 100 },
     };
diff --git a/tests/ImageSharp.Tests/Formats/Tiff/TiffDecoderTests.cs b/tests/ImageSharp.Tests/Formats/Tiff/TiffDecoderTests.cs
index e432a7251b..6123d46dac 100644
--- a/tests/ImageSharp.Tests/Formats/Tiff/TiffDecoderTests.cs
+++ b/tests/ImageSharp.Tests/Formats/Tiff/TiffDecoderTests.cs
@@ -707,17 +707,17 @@ public class TiffDecoderTests : TiffDecoderBaseTester
     [WithFile(YCbCrJpegCompressed2, PixelTypes.Rgba32)]
     [WithFile(RgbJpegCompressedNoJpegTable, PixelTypes.Rgba32)]
     [WithFile(GrayscaleJpegCompressed, PixelTypes.Rgba32)]
-    [WithFile(Issues2123, PixelTypes.Rgba32)]
-    public void TiffDecoder_CanDecode_JpegCompressed<TPixel>(TestImageProvider<TPixel> provider)
-        where TPixel : unmanaged, IPixel<TPixel> => TestTiffDecoder(provider, useExactComparer: false);
+    [WithFile(Issues2123, PixelTypes.Rgba32, 0.110f)]
+    public void TiffDecoder_CanDecode_JpegCompressed<TPixel>(TestImageProvider<TPixel> provider, float tolerance = 0.001f)
+        where TPixel : unmanaged, IPixel<TPixel> => TestTiffDecoder(provider, useExactComparer: false, compareTolerance: tolerance);
 
     [Theory]
     [WithFile(RgbOldJpegCompressed, PixelTypes.Rgba32)]
-    [WithFile(RgbOldJpegCompressed2, PixelTypes.Rgba32)]
+    [WithFile(RgbOldJpegCompressed2, PixelTypes.Rgba32, 0.1003f)]
     [WithFile(RgbOldJpegCompressed3, PixelTypes.Rgba32)]
     [WithFile(RgbOldJpegCompressedGray, PixelTypes.Rgba32)]
     [WithFile(YCbCrOldJpegCompressed, PixelTypes.Rgba32)]
-    public void TiffDecoder_CanDecode_OldJpegCompressed<TPixel>(TestImageProvider<TPixel> provider)
+    public void TiffDecoder_CanDecode_OldJpegCompressed<TPixel>(TestImageProvider<TPixel> provider, float tolerance = 0.001f)
         where TPixel : unmanaged, IPixel<TPixel>
     {
         DecoderOptions decoderOptions = new()
@@ -728,7 +728,7 @@ public class TiffDecoderTests : TiffDecoderBaseTester
         image.DebugSave(provider);
         image.CompareToOriginal(
             provider,
-            ImageComparer.Tolerant(0.001f),
+            ImageComparer.Tolerant(tolerance),
             ReferenceDecoder,
             decoderOptions);
     }
@@ -784,7 +784,7 @@ public class TiffDecoderTests : TiffDecoderBaseTester
 
         // The image is handcrafted to simulate issue 2679. ImageMagick will throw an expection here and wont decode,
         // so we compare to rererence output instead.
-        image.DebugSave(provider);
+        image.DebugSave(provider, appendPixelTypeToFileName: false);
         image.CompareToReferenceOutput(
             ImageComparer.Exact,
             provider,
diff --git a/tests/Images/External/ReferenceOutput/HistogramEqualizationTests/AutoLevel_SeparateChannels_CompareToReferenceOutput_Rgba32_forest_bridge.png b/tests/Images/External/ReferenceOutput/HistogramEqualizationTests/AutoLevel_SeparateChannels_CompareToReferenceOutput_Rgba32_forest_bridge.png
index de79ec729c..84c7e64ee0 100644
--- a/tests/Images/External/ReferenceOutput/HistogramEqualizationTests/AutoLevel_SeparateChannels_CompareToReferenceOutput_Rgba32_forest_bridge.png
+++ b/tests/Images/External/ReferenceOutput/HistogramEqualizationTests/AutoLevel_SeparateChannels_CompareToReferenceOutput_Rgba32_forest_bridge.png
@@ -1,3 +1,3 @@
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-oid sha256:aada4a2ccf45de24f2a591a18d9bc0260ceb3829e104fee6982061013ed87282
-size 14107709
+oid sha256:4a4d2a3a1f320d3fcb121bd8edf716354b7e8ceb251a9eaa2087f443a3adbbc1
+size 10896218
diff --git a/tests/Images/External/ReferenceOutput/HistogramEqualizationTests/AutoLevel_SynchronizedChannels_CompareToReferenceOutput_Rgba32_forest_bridge.png b/tests/Images/External/ReferenceOutput/HistogramEqualizationTests/AutoLevel_SynchronizedChannels_CompareToReferenceOutput_Rgba32_forest_bridge.png
index ff5b35a5f7..679615d17e 100644
--- a/tests/Images/External/ReferenceOutput/HistogramEqualizationTests/AutoLevel_SynchronizedChannels_CompareToReferenceOutput_Rgba32_forest_bridge.png
+++ b/tests/Images/External/ReferenceOutput/HistogramEqualizationTests/AutoLevel_SynchronizedChannels_CompareToReferenceOutput_Rgba32_forest_bridge.png
@@ -1,3 +1,3 @@
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-oid sha256:dca9b5b890d3a79b0002b7093d254d484ada4207e5010d1f0c6248d4dd6e22db
-size 13909894
+oid sha256:0c3f30908a803ac5956dbd5959b225bceab1fc673a1b89d55d1096ba024c7bcc
+size 12519351
diff --git a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_Calliphora.png b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_Calliphora.png
index 07c29c0976..95ea3d4721 100644
--- a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_Calliphora.png
+++ b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_Calliphora.png
@@ -1,3 +1,3 @@
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-oid sha256:362eddc5e06d672b4654bfe7a1ded995934a1c59719a3f909773b2e61931ffac
-size 1332495
+oid sha256:9a6f484f06c0b466d16591db78fec3cd2c3f6ebc7578896075cd4af95d8ceaab
+size 1411818
diff --git a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_Issue394-MultiHuffmanBaseline-Speakers.png b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_Issue394-MultiHuffmanBaseline-Speakers.png
index 1f38ec542f..8288801623 100644
--- a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_Issue394-MultiHuffmanBaseline-Speakers.png
+++ b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_Issue394-MultiHuffmanBaseline-Speakers.png
@@ -1,3 +1,3 @@
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-oid sha256:b7a1e89adcd70f792d678786a177bac927a15d6065001cd76aab0bf3cc1b7b4c
-size 1034853
+oid sha256:88271ffea79e42914b8c37828da65afb691c7319b8e28fdd35942ecba4087baa
+size 1060013
diff --git a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_MultiScanBaselineCMYK.png b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_MultiScanBaselineCMYK.png
index 349ff64858..e72b1a0415 100644
--- a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_MultiScanBaselineCMYK.png
+++ b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_MultiScanBaselineCMYK.png
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:d9dbb00a4be909d4b7fd605f83f786ff85545da54272a256c100afd80d687e8f
-size 93253
+oid sha256:3b160cc44490303c23c0abaa0dda827d68e11bfa67127e19da974073085abbe4
+size 96042
diff --git a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_badeof.png b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_badeof.png
index 830a95bd74..ccdb19e4db 100644
--- a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_badeof.png
+++ b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_badeof.png
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:24f637742951c438da5acbae6a93545830ea4d0065031572a3bdd1c96be15cce
-size 48990
+oid sha256:7ce1a5d71cefd6527daecb8c1d9089f63189b833f1186971ddb89c6257d076ef
+size 46745
diff --git a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_badrst.png b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_badrst.png
index 0512251ab4..4f2aae2ed6 100644
--- a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_badrst.png
+++ b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_badrst.png
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:0501e53f97ddb4252e15073dc75f4129428befe5594a07297c21ae9f89f075b2
-size 316278
+oid sha256:522b0a2f9a97689217af461ab2a63a41553c0ae6ca28cde046b01019c87e2393
+size 348228
diff --git a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_cmyk.png b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_cmyk.png
index 27c22ecc6d..e24cc59690 100644
--- a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_cmyk.png
+++ b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_cmyk.png
@@ -1,3 +1,3 @@
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-oid sha256:d2253c83151238056caef2f3bca8800108a84360b2ff21979e4ff37fdddd2232
-size 419852
+oid sha256:5e81ac851f979c017082180a13ee4ddfe26c4151bfc082f7915252e57da44ec7
+size 416967
diff --git a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_jpeg420small.png b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_jpeg420small.png
index 4032a32afb..ae30676b36 100644
--- a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_jpeg420small.png
+++ b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_jpeg420small.png
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:2b5e1d91fb6dc1ddb696fbee63331ba9c6ef3548b619c005887e60c5b01f4981
-size 27303
+oid sha256:79291e1eddee66548156fc40bb5c8b1209c7b0048fb56f2bb7890c7d89ce655e
+size 27264
diff --git a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_jpeg422.png b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_jpeg422.png
index 018ecda7a5..8ddb748802 100644
--- a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_jpeg422.png
+++ b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_jpeg422.png
@@ -1,3 +1,3 @@
 version https://git-lfs.github.com/spec/v1
-oid sha256:733cc46271c4402974db2536a55e6ecae3110856df73031ca48dad03745d852d
-size 35375
+oid sha256:5196d5a20f639d833cf1ad979a290c144c97b41897fa5f0fa7454f5f4e8d3c11
+size 28697
diff --git a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_jpeg444.png b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_jpeg444.png
index e5ce7eb3d3..acca4b44e3 100644
--- a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_jpeg444.png
+++ b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_jpeg444.png
@@ -1,3 +1,3 @@
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-oid sha256:6543f546fac9d05ebdac7a534b0cc422f31bfd81067212a19cb3a52ad24560a8
-size 3978
+oid sha256:9894983085f3d3d45b8c4ea9acc680932f236a4602230046386130aa2af916f1
+size 4936
diff --git a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_testorig.png b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_testorig.png
index 830a95bd74..ccdb19e4db 100644
--- a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_testorig.png
+++ b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_testorig.png
@@ -1,3 +1,3 @@
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-oid sha256:24f637742951c438da5acbae6a93545830ea4d0065031572a3bdd1c96be15cce
-size 48990
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+size 46745
diff --git a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_testorig12.png b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_testorig12.png
index 23f1941dcc..dc41461e01 100644
--- a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_testorig12.png
+++ b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_testorig12.png
@@ -1,3 +1,3 @@
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-oid sha256:ad57cf87eade9ee6663f575b358eafaa869a16b3b02d0fb00ca8c683422b85a0
-size 47601
+oid sha256:26ef4244aa761c7b6c51534e414f79438753b9dbd1fbf45d2f1e2fd2dd4ec4c1
+size 46636
diff --git a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_ycck-subsample-1222.png b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_ycck-subsample-1222.png
index f35c40ed89..66337b5c94 100644
--- a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_ycck-subsample-1222.png
+++ b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_ycck-subsample-1222.png
@@ -1,3 +1,3 @@
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-oid sha256:a17478333c6ef0943aeb96faba1c0ea560995d0612564fe033b72b2949f4869f
-size 66748
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+size 66932
diff --git a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_ycck.png b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_ycck.png
index 5f41fb5239..76183356bd 100644
--- a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_ycck.png
+++ b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeBaselineJpeg_ycck.png
@@ -1,3 +1,3 @@
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-oid sha256:63f7105e9e2d0794b3f7225af2187a5717c12b806b68b33b98e08e0a0b1ffa79
-size 71051
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+size 58272
diff --git a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeProgressiveJpeg_BadEofProgressive.png b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeProgressiveJpeg_BadEofProgressive.png
index 2386ae49a2..ecf22f93ca 100644
--- a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeProgressiveJpeg_BadEofProgressive.png
+++ b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeProgressiveJpeg_BadEofProgressive.png
@@ -1,3 +1,3 @@
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-size 568177
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diff --git a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeProgressiveJpeg_ExifUndefType.png b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeProgressiveJpeg_ExifUndefType.png
index 3de8b15578..c144554ca2 100644
--- a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeProgressiveJpeg_ExifUndefType.png
+++ b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeProgressiveJpeg_ExifUndefType.png
@@ -1,3 +1,3 @@
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diff --git a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeProgressiveJpeg_fb.png b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeProgressiveJpeg_fb.png
index 07a7c3573e..30bfb538f1 100644
--- a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeProgressiveJpeg_fb.png
+++ b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeProgressiveJpeg_fb.png
@@ -1,3 +1,3 @@
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index 8241c36ac3..e9a2a0bd86 100644
--- a/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeProgressiveJpeg_progress.png
+++ b/tests/Images/External/ReferenceOutput/JpegDecoderTests/DecodeProgressiveJpeg_progress.png
@@ -1,3 +1,3 @@
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-size 301416
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+size 297941
diff --git a/tests/Images/External/ReferenceOutput/JpegDecoderTests/Decode_CMYK_ICC_Jpeg_Rgba32_issue-129.png b/tests/Images/External/ReferenceOutput/JpegDecoderTests/Decode_CMYK_ICC_Jpeg_Rgba32_issue-129.png
index 77a9d0d9cb..4e554a34d3 100644
--- a/tests/Images/External/ReferenceOutput/JpegDecoderTests/Decode_CMYK_ICC_Jpeg_Rgba32_issue-129.png
+++ b/tests/Images/External/ReferenceOutput/JpegDecoderTests/Decode_CMYK_ICC_Jpeg_Rgba32_issue-129.png
@@ -1,3 +1,3 @@
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