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Refactored BinaryThresholdProcessor<TPixel>

pull/1132/head
Sergio Pedri 6 years ago
parent
db68d7d170
commit
3d31033dab
1 changed files with 13 additions and 17 deletions
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  1. 30
      src/ImageSharp/Processing/Processors/Binarization/BinaryThresholdProcessor{TPixel}.cs

30
src/ImageSharp/Processing/Processors/Binarization/BinaryThresholdProcessor{TPixel}.cs
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@ -4,7 +4,6 @@
using System; using System;
using System.Runtime.CompilerServices; using System.Runtime.CompilerServices;
using SixLabors.ImageSharp.Advanced; using SixLabors.ImageSharp.Advanced;
using SixLabors.ImageSharp.Memory;
using SixLabors.ImageSharp.PixelFormats; using SixLabors.ImageSharp.PixelFormats;
namespace SixLabors.ImageSharp.Processing.Processors.Binarization namespace SixLabors.ImageSharp.Processing.Processors.Binarization
@ -44,8 +43,8 @@ namespace SixLabors.ImageSharp.Processing.Processors.Binarization
var interest = Rectangle.Intersect(sourceRectangle, source.Bounds()); var interest = Rectangle.Intersect(sourceRectangle, source.Bounds());
bool isAlphaOnly = typeof(TPixel) == typeof(A8); bool isAlphaOnly = typeof(TPixel) == typeof(A8);
var operation = new RowIntervalOperation(interest, source, upper, lower, threshold, isAlphaOnly); var operation = new RowOperation(interest, source, upper, lower, threshold, isAlphaOnly);
ParallelRowIterator.IterateRowIntervals( ParallelRowIterator.IterateRows(
configuration, configuration,
interest, interest,
in operation); in operation);
@ -54,7 +53,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Binarization
/// <summary> /// <summary>
/// A <see langword="struct"/> implementing the clone logic for <see cref="BinaryThresholdProcessor{TPixel}"/>. /// A <see langword="struct"/> implementing the clone logic for <see cref="BinaryThresholdProcessor{TPixel}"/>.
/// </summary> /// </summary>
private readonly struct RowIntervalOperation : IRowIntervalOperation private readonly struct RowOperation : IRowOperation
{ {
private readonly ImageFrame<TPixel> source; private readonly ImageFrame<TPixel> source;
private readonly TPixel upper; private readonly TPixel upper;
@ -65,7 +64,7 @@ namespace SixLabors.ImageSharp.Processing.Processors.Binarization
private readonly bool isAlphaOnly; private readonly bool isAlphaOnly;
[MethodImpl(InliningOptions.ShortMethod)] [MethodImpl(InliningOptions.ShortMethod)]
public RowIntervalOperation( public RowOperation(
Rectangle bounds, Rectangle bounds,
ImageFrame<TPixel> source, ImageFrame<TPixel> source,
TPixel upper, TPixel upper,
@ -84,22 +83,19 @@ namespace SixLabors.ImageSharp.Processing.Processors.Binarization
/// <inheritdoc/> /// <inheritdoc/>
[MethodImpl(InliningOptions.ShortMethod)] [MethodImpl(InliningOptions.ShortMethod)]
public void Invoke(in RowInterval rows) public void Invoke(int y)
{ {
Rgba32 rgba = default; Rgba32 rgba = default;
for (int y = rows.Min; y < rows.Max; y++) Span<TPixel> row = this.source.GetPixelRowSpan(y);
{
Span<TPixel> row = this.source.GetPixelRowSpan(y);
for (int x = this.minX; x < this.maxX; x++) for (int x = this.minX; x < this.maxX; x++)
{ {
ref TPixel color = ref row[x]; ref TPixel color = ref row[x];
color.ToRgba32(ref rgba); color.ToRgba32(ref rgba);
// Convert to grayscale using ITU-R Recommendation BT.709 if required // Convert to grayscale using ITU-R Recommendation BT.709 if required
byte luminance = this.isAlphaOnly ? rgba.A : ImageMaths.Get8BitBT709Luminance(rgba.R, rgba.G, rgba.B); byte luminance = this.isAlphaOnly ? rgba.A : ImageMaths.Get8BitBT709Luminance(rgba.R, rgba.G, rgba.B);
color = luminance >= this.threshold ? this.upper : this.lower; color = luminance >= this.threshold ? this.upper : this.lower;
}
} }
} }
} }

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