public void TestByRegion(string resourcePath)
{
// Load source image
using Image sourceImage = TestImage.FromResource(resourcePath);
Assert.IsNotNull(sourceImage);
Rectangle region = new(0, 0, sourceImage.Width / 2, sourceImage.Height / 2);
// Crop region of image
using Image croppedImage = ImageCrop.ByRegion(sourceImage, region);
Assert.IsNotNull(croppedImage);
// Check size
Assert.AreEqual(region.Width, croppedImage.Width);
Assert.AreEqual(region.Height, croppedImage.Height);
// Get bytes for each image
byte[] sourceBytes = ImageBytes.FromImage(sourceImage);
byte[] croppedBytes = ImageBytes.FromImage(sourceImage);
// Compare to ensure correct region cropped
int limit = croppedImage.Width * croppedImage.Height;
for (int i = 0; i < limit; i++)
{
Assert.AreEqual(sourceBytes[i], croppedBytes[i]);
}
}
public void TestFromSourceToDestination(string resourcePath)
{
// Load source image
using Bitmap sourceBitmap = TestImage.FromResource(resourcePath) as Bitmap;
Assert.IsNotNull(sourceBitmap);
// Create blank bitmap
using Bitmap copyBitmap = new(sourceBitmap.Width, sourceBitmap.Height, sourceBitmap.PixelFormat);
// Crop region of image
ImageCopy.FromSourceToDestination(sourceBitmap, copyBitmap);
// Check size
Assert.AreEqual(sourceBitmap.Width, copyBitmap.Width);
Assert.AreEqual(sourceBitmap.Height, copyBitmap.Height);
// Get bytes for each image
byte[] sourceBytes = ImageBytes.FromImage(sourceBitmap);
byte[] copiedBytes = ImageBytes.FromImage(copyBitmap);
// Compare to ensure correct copy matches
int limit = System.Math.Min(sourceBytes.Length, copiedBytes.Length);
for (int i = 0; i < limit; i++)
{
Assert.AreEqual(sourceBytes[i], copiedBytes[i]);
}
}
public void TestCombineAllWithNegative()
{
string resourcePath = "Freedom35.ImageProcessing.Tests.Resources.clock.bmp";
// Load source image
using Image sourceImage = TestImage.FromResource(resourcePath);
Assert.IsNotNull(sourceImage);
using Image negativeCopy = ImageColor.ToNegative(sourceImage);
Assert.IsNotNull(negativeCopy);
Image[] imagesToCombine = new Image[]
{
sourceImage,
negativeCopy
};
Bitmap combinedImage = ImageCombine.All(imagesToCombine);
// Get bytes for images
byte[] combinedBytes = ImageBytes.FromImage(combinedImage);
// Just check first row of bytes has been combined
for (int i = 0; i < combinedImage.Width; i++)
{
Assert.AreEqual(byte.MaxValue, combinedBytes[i]);
}
int pixelDepth = 3;
int stride = 1056;
int width = 1053;
int height = combinedImage.Height;
int limit = combinedBytes.Length - 4;
// Compare combined bytes excluding stride padding
for (int y = 0; y < height; y++)
{
int offset = y * stride;
for (int x = 0; x < width; x += pixelDepth)
{
int i = offset + x;
if (i < limit)
{
Assert.AreEqual(byte.MaxValue, combinedBytes[i]);
}
else
{
break;
}
}
}
}
public static bool Compare(Image image1, Image image2)
{
byte[] imageBytes1 = ImageBytes.FromImage(image1);
byte[] imageBytes2 = ImageBytes.FromImage(image2);
bool match = imageBytes1.Length == imageBytes2.Length;
for (int i = 0; match && i < imageBytes1.Length; i++)
{
match = imageBytes1[i] == imageBytes2[i];
}
return(match);
}
public void TestApplyThresholdValue(string sourceResourcePath)
{
// Load source image
using Image sourceImage = TestImage.FromResource(sourceResourcePath);
Assert.IsNotNull(sourceImage);
// Apply threshold
using Image thresholdImage = ImageThreshold.Apply(sourceImage, 0x40);
Assert.IsNotNull(thresholdImage);
byte[] withoutAlphaBytes = RemoveAlphaLayerBytes(ImageBytes.FromImage(thresholdImage), sourceImage.PixelFormat);
// Check bytes thresholded
Assert.IsTrue(withoutAlphaBytes.Take(sourceImage.Width).All(b => b == byte.MinValue || b == byte.MaxValue));
}
public void TestApplyMin(string sourceResourcePath)
{
// Load source image
using Image sourceImage = TestImage.FromResource(sourceResourcePath);
Assert.IsNotNull(sourceImage);
// Apply min value
using Image minImage = ImageThreshold.ApplyMin(sourceImage, 0x20);
Assert.IsNotNull(minImage);
byte[] withoutAlphaBytes = RemoveAlphaLayerBytes(ImageBytes.FromImage(minImage), sourceImage.PixelFormat);
// Check all greater than value
Assert.IsTrue(withoutAlphaBytes.All(b => b >= 0x20));
}
public void TestApplyMinMax(string sourceResourcePath)
{
// Load source image
using Image sourceImage = TestImage.FromResource(sourceResourcePath);
Assert.IsNotNull(sourceImage);
// Apply min/max value
using Image minMaxImage = ImageThreshold.ApplyMinMax(sourceImage, 0x25, 0xc3);
Assert.IsNotNull(minMaxImage);
byte[] withoutAlphaBytes = RemoveAlphaLayerBytes(ImageBytes.FromImage(minMaxImage), sourceImage.PixelFormat);
// Check all within range
Assert.IsTrue(withoutAlphaBytes.All(b => b >= 0x25 && b <= 0xc3));
}
public void TestCombineAllOne()
{
using Image sourceImage = TestImage.FromResource("Freedom35.ImageProcessing.Tests.Resources.clock.bmp");
Assert.IsNotNull(sourceImage);
Image[] imagesToCombine = new Image[]
{
sourceImage
};
// Combine
Bitmap combinedBitmap = ImageCombine.All(imagesToCombine);
// Convert for byte comparison
byte[] sourceBytes = ImageBytes.FromImage(sourceImage);
byte[] combinedBytes = ImageBytes.FromImage(combinedBitmap);
// Should return the same image when only combining one
for (int i = 0; i < sourceImage.Width; i++)
{
Assert.AreEqual(sourceBytes[i], combinedBytes[i]);
}
}