
原始出處
Bitmap origanalImage;
Bitmap adjustedImage;
double brightness = 1.0f; // no change in brightness
double constrast = 2.0f; // twice the contrast
double gamma = 1.0f; // no change in gamma
float adjustedBrightness = brightness - 1.0f;
// create matrix that will brighten and contrast the image
float[][] ptsArray ={
new float[] {contrast, 0, 0, 0, 0}, // scale red
new float[] {0, contrast, 0, 0, 0}, // scale green
new float[] {0, 0, contrast, 0, 0}, // scale blue
new float[] {0, 0, 0, 1.0f, 0}, // don't scale alpha
new float[] {adjustedBrightness, adjustedBrightness, adjustedBrightness, 0, 1}};
imageAttributes = new ImageAttributes();
imageAttributes.ClearColorMatrix();
imageAttributes.SetColorMatrix(new ColorMatrix(ptsArray), ColorMatrixFlag.Default, ColorAdjustType.Bitmap);
imageAttributes.SetGamma(gamma, ColorAdjustType.Bitmap);
Graphics g = Graphics.FromImage(adjustedImage);
g.DrawImage(originalImage, new Rectangle(0,0,adjustedImage.Width,adjustedImage.Height)
,0,0,bitImage.Width,bitImage.Height,
GraphicsUnit.Pixel, imageAttributes);
8 個回應:
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Re: Jeffery <2948470297290767268>
歡迎呀!
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