private GammaRamp CreateGammaRamp(ColorBalance colorBalance)
{
// Create native ramp object
var ramp = new GammaRamp
{
Red = new ushort[256],
Green = new ushort[256],
Blue = new ushort[256]
};
// Create linear ramps for each color
for (var i = 0; i < 256; i++)
{
ramp.Red[i] = (ushort)(i * 255 * colorBalance.Red);
ramp.Green[i] = (ushort)(i * 255 * colorBalance.Green);
ramp.Blue[i] = (ushort)(i * 255 * colorBalance.Blue);
}
// Some drivers will ignore request to change gamma if the ramp is the same as last time
// so we randomize it a bit. Even though our ramp may not have changed, other applications
// could have affected the gamma and we need to "force-refresh" it to ensure it's valid.
_gammaChannelOffset = ++_gammaChannelOffset % 5;
ramp.Red[255] = (ushort)(ramp.Red[255] + _gammaChannelOffset);
ramp.Green[255] = (ushort)(ramp.Green[255] + _gammaChannelOffset);
ramp.Blue[255] = (ushort)(ramp.Blue[255] + _gammaChannelOffset);
return(ramp);
}
public void Different_values_yield_different_images()
{
foreach (string file in this.images)
{
// arrange
using (ImageFactory factory = new ImageFactory())
{
factory.Load(file);
ColorBalance processor = new ColorBalance();
processor.DynamicParameter = new ColorBalanceParameters();
ColorBalance processor2 = new ColorBalance();
processor2.DynamicParameter = new ColorBalanceParameters()
{
Blue = 155,
Green = 155,
Red = 155
};
// act
Bitmap result = new Bitmap(processor.ProcessImage(factory));
Bitmap result2 = new Bitmap(processor2.ProcessImage(factory));
result2.Save(string.Format("{0}/{1}_colorbalance2.jpg", Path.GetDirectoryName(file), Path.GetFileNameWithoutExtension(file)), ImageFormat.Jpeg);
// assert
result.Equals(result2).Should().BeFalse("because different parameters should yield different images");
}
}
}
public IActionResult UpdateColorImage(int blueRed, int purpleGreen, int yellowDarkBlue) //изменение цветового баланса
{
UInt32 p;
image = new Bitmap(ActionPictureController.pathImage);
//получение матрицы с пикселями
pixel = new UInt32[image.Height, image.Width];
for (int y = 0; y < image.Height; y++)
{
for (int x = 0; x < image.Width; x++)
{
pixel[y, x] = (UInt32)(image.GetPixel(x, y).ToArgb());
}
}
//цветовой баланс R
for (int i = 0; i < image.Height; i++)
{
for (int j = 0; j < image.Width; j++)
{
p = ColorBalance.ColorBalance_R(pixel[i, j], blueRed, 10);
FromOnePixelToBitmap(i, j, p);
pixel[i, j] = (UInt32)(image.GetPixel(j, i).ToArgb());
}
}
//цветовой баланс G
for (int i = 0; i < image.Height; i++)
{
for (int j = 0; j < image.Width; j++)
{
p = ColorBalance.ColorBalance_G(pixel[i, j], purpleGreen, 10);
FromOnePixelToBitmap(i, j, p);
pixel[i, j] = (UInt32)(image.GetPixel(j, i).ToArgb());
}
}
//цветовой баланс B
for (int i = 0; i < image.Height; i++)
{
for (int j = 0; j < image.Width; j++)
{
p = ColorBalance.ColorBalance_B(pixel[i, j], yellowDarkBlue, 10);
FromOnePixelToBitmap(i, j, p);
pixel[i, j] = (UInt32)(image.GetPixel(j, i).ToArgb());
}
}
bitmapBytes = BitmapToBytes(image);
image.Dispose();
string imreBase64Data = Convert.ToBase64String(bitmapBytes);
string imgDataURL = string.Format("data:image/jpeg;base64,{0}", imreBase64Data);
ViewBag.ImageData = imgDataURL;
return(View("~/Views/Home/UpdateImage.cshtml"));
}
public void SetGamma(ColorBalance colorBalance)
{
lock (_lock)
{
// Create ramp
var ramp = CreateGammaRamp(colorBalance);
// Set gamma
NativeMethods.SetDeviceGammaRamp(_deviceContext, ref ramp);
}
}
public override void Image_is_processed()
{
foreach (string file in this.images)
{
// arrange
using (ImageFactory factory = new ImageFactory())
{
factory.Load(file);
ColorBalance processor = new ColorBalance();
processor.DynamicParameter = new ColorBalanceParameters();
// act
Action act = () =>
{
Image img = processor.ProcessImage(factory);
img.Save(string.Format("{0}/{1}_colorbalance.jpg", Path.GetDirectoryName(file), Path.GetFileNameWithoutExtension(file)), ImageFormat.Jpeg);
};
// assert
act.ShouldNotThrow("because the image should have been processed without error");
}
}
}
