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Revert "fixed padding tooltip for all"

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This reverts commit 6242220, which broke tooltip detection.

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
This commit is contained in:
Boki 2026-02-11 14:15:28 -05:00
parent f9b8ef9158
commit b8f5637c49
4 changed files with 123 additions and 260 deletions
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25
tools/OcrDaemon/ImagePreprocessor.cs
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@ -11,25 +11,15 @@ static class ImagePreprocessor
/// Isolates bright tooltip text, suppresses dim background text visible through overlay.
/// Pipeline: grayscale → morphological top-hat → Otsu binary → 2x upscale
/// </summary>
public static Bitmap PreprocessForOcr(Bitmap src, OcrOptions? options = null)
public static Bitmap PreprocessForOcr(Bitmap src)
{
if (options != null && !options.Preprocess)
return CloneArgb(src);
int kernelSize = options?.KernelSize ?? 25;
if (kernelSize < 3) kernelSize = 3;
if (kernelSize % 2 == 0) kernelSize += 1;
int scale = options?.Scale ?? 2;
if (scale < 1) scale = 1;
using var mat = BitmapConverter.ToMat(src);
using var gray = new Mat();
Cv2.CvtColor(mat, gray, ColorConversionCodes.BGRA2GRAY);
// Morphological white top-hat: isolates bright text on dark background
// Kernel size 25x25 captures text strokes, suppresses dim background text
using var kernel = Cv2.GetStructuringElement(MorphShapes.Rect, new OpenCvSharp.Size(kernelSize, kernelSize));
using var kernel = Cv2.GetStructuringElement(MorphShapes.Rect, new OpenCvSharp.Size(25, 25));
using var tophat = new Mat();
Cv2.MorphologyEx(gray, tophat, MorphTypes.TopHat, kernel);
@ -38,19 +28,10 @@ static class ImagePreprocessor
Cv2.Threshold(tophat, binary, 0, 255, ThresholdTypes.BinaryInv | ThresholdTypes.Otsu);
// 2x upscale for better LSTM recognition
if (scale == 1)
return BitmapConverter.ToBitmap(binary);
using var upscaled = new Mat();
Cv2.Resize(binary, upscaled, new OpenCvSharp.Size(binary.Width * scale, binary.Height * scale),
Cv2.Resize(binary, upscaled, new OpenCvSharp.Size(binary.Width * 2, binary.Height * 2),
interpolation: InterpolationFlags.Cubic);
return BitmapConverter.ToBitmap(upscaled);
}
private static Bitmap CloneArgb(Bitmap src)
{
var rect = new Rectangle(0, 0, src.Width, src.Height);
return src.Clone(rect, System.Drawing.Imaging.PixelFormat.Format32bppArgb);
}
}