Remove Tiff specific values from the EXIF profile

src/ImageSharp/Formats/Tiff/TiffDecoderMetadataCreator.cs

@@ -56,9 +56,22 @@ namespace SixLabors.ImageSharp.Formats.Tiff
                         }
                     }
 
-                    if (coreMetadata.ExifProfile == null)
+                    if (coreMetadata.ExifProfile == null && frame.ExifProfile != null)
                     {
-                        coreMetadata.ExifProfile = frame?.ExifProfile.DeepClone();
+                        coreMetadata.ExifProfile = frame.ExifProfile.DeepClone();
+
+                        // Remove Tiff specific tags from the profile.
+                        coreMetadata.ExifProfile.RemoveValue(ExifTag.ImageWidth);
+                        coreMetadata.ExifProfile.RemoveValue(ExifTag.ImageLength);
+                        coreMetadata.ExifProfile.RemoveValue(ExifTag.ResolutionUnit);
+                        coreMetadata.ExifProfile.RemoveValue(ExifTag.Predictor);
+                        coreMetadata.ExifProfile.RemoveValue(ExifTag.PlanarConfiguration);
+                        coreMetadata.ExifProfile.RemoveValue(ExifTag.PhotometricInterpretation);
+                        coreMetadata.ExifProfile.RemoveValue(ExifTag.BitsPerSample);
+                        coreMetadata.ExifProfile.RemoveValue(ExifTag.ColorMap);
+                        coreMetadata.ExifProfile.RemoveValue(ExifTag.Compression);
+                        coreMetadata.ExifProfile.RemoveValue(ExifTag.StripOffsets);
+                        coreMetadata.ExifProfile.RemoveValue(ExifTag.StripByteCounts);
                     }
 
                     if (coreMetadata.IptcProfile == null)

src/ImageSharp/Formats/Tiff/TiffFrameMetadata.cs

@@ -208,25 +208,5 @@ namespace SixLabors.ImageSharp.Formats.Tiff
 
         /// <inheritdoc/>
         public IDeepCloneable DeepClone() => new TiffFrameMetadata() { ExifProfile = this.ExifProfile.DeepClone() };
-
-        private static bool IsFormatTag(ExifTagValue tag)
-        {
-            switch (tag)
-            {
-                case ExifTagValue.ImageWidth:
-                case ExifTagValue.ImageLength:
-                case ExifTagValue.ResolutionUnit:
-                case ExifTagValue.XResolution:
-                case ExifTagValue.YResolution:
-                case ExifTagValue.Predictor:
-                case ExifTagValue.PlanarConfiguration:
-                case ExifTagValue.PhotometricInterpretation:
-                case ExifTagValue.BitsPerSample:
-                case ExifTagValue.ColorMap:
-                    return true;
-            }
-
-            return false;
-        }
     }
 }

tests/ImageSharp.Tests/Metadata/Profiles/Exif/ExifProfileTests.cs

@@ -175,9 +175,7 @@ namespace SixLabors.ImageSharp.Tests
          https://exiftool.org/TagNames/EXIF.html */
         [InlineData(TestImageWriteFormat.Jpeg, 16)]
         [InlineData(TestImageWriteFormat.Png, 16)]
-        /* Note: The tiff format has 24 expected profile values, because some tiff specific exif
-         values will be written in addition to the original profile. */
-        [InlineData(TestImageWriteFormat.Tiff, 24)]
+        [InlineData(TestImageWriteFormat.Tiff, 16)]
         public void SetValue(TestImageWriteFormat imageFormat, int expectedProfileValueCount)
         {
             Image<Rgba32> image = TestFile.Create(TestImages.Jpeg.Baseline.Floorplan).CreateRgba32Image();