public void GetClusters_SameFiles_ReturnsZero()
{
using var leftImgCopy1 = new Bitmap(leftImg1);
using var leftImgCopy2 = new Bitmap(leftImg1);
var leftBits = leftImgCopy1.LockBits(
new Rectangle(0, 0, leftImgCopy1.Width, leftImgCopy1.Height),
ImageLockMode.ReadWrite,
PixelFormat.Format32bppArgb);
var leftBits2 = leftImgCopy2.LockBits(
new Rectangle(0, 0, leftImgCopy2.Width, leftImgCopy2.Height),
ImageLockMode.ReadWrite,
PixelFormat.Format32bppArgb);
diff.ImagePreprocessor.Process(leftBits);
diff.ImagePreprocessor.Process(leftBits2);
var pixels = diff.GetDifferentPixels(25, leftBits, leftBits2);
var clusters = _testClass.GetClusters(pixels, int.MaxValue).ToList();
Assert.AreEqual(0, clusters.Count);
leftImgCopy1.UnlockBits(leftBits);
leftImgCopy2.UnlockBits(leftBits2);
}
/// <summary>
/// Calculate difference between provided images
/// </summary>
/// <param name="errorTolerance">Maximum allowed pixel delta</param>
/// <param name="maxDifferences">Maximum differences to recognize</param>
/// <returns>Image with highlighted differences</returns>
public Image Calculate(double errorTolerance, int maxDifferences = int.MaxValue)
{
using var leftCopy = new Bitmap(_left);
using var rightCopy = new Bitmap(_right);
var leftBits = leftCopy.LockBits(
new Rectangle(0, 0, leftCopy.Width, leftCopy.Height),
ImageLockMode.ReadWrite,
PixelFormat.Format32bppArgb);
var rightBits = rightCopy.LockBits(
new Rectangle(0, 0, rightCopy.Width, rightCopy.Height),
ImageLockMode.ReadWrite,
PixelFormat.Format32bppArgb);
if (Preprocess(leftBits, rightBits) && _progressObserver != null)
{
_progressObserver.Report(leftCopy, "leftPreprocess");
_progressObserver.Report(rightCopy, "rightPreprocess");
}
using var pixels = _diffAlgorithm.GetDifferentPixels(errorTolerance, leftBits, rightBits, _progressObserver);
leftCopy.UnlockBits(leftBits);
rightCopy.UnlockBits(rightBits);
var result = new Bitmap(_left);
_diffHighlighter?.Highlight(result, pixels, maxDifferences, _progressObserver);
return(result);
}