tcc/ASP.NET/Services/ImageService.cs

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2.6 KiB
C#
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using ImageMagick;
namespace TCC.Services
{
public class ImageService
{
public ImageService() { }
public MagickImage BoxBlurImage(Stream imageStream, int radius)
{
var image = new MagickImage(imageStream);
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image.GaussianBlur(radius, radius);
return image;
//var blurredImage = new MagickImage(image);
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//blurredImage = BoxBlurImageSeparable(image, blurredImage, radius, 0);
//blurredImage = BoxBlurImageSeparable(blurredImage, blurredImage, 0, radius);
//return blurredImage;
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}
private MagickImage BoxBlurImageSeparable(MagickImage image, MagickImage blurredImage, int radiusX, int radiusY)
{
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var pixels = image.GetPixels();
var blurredPixels = blurredImage.GetPixelsUnsafe();
foreach (var pixel in pixels)
{
int x = pixel.X,
y = pixel.Y;
long rTotal = 0, gTotal = 0, bTotal = 0;
int pixelCount = 0;
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for (int offsetY = -radiusY; offsetY <= radiusY; offsetY++)
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{
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for (int offsetX = -radiusX; offsetX <= radiusX; offsetX++)
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{
int newX = x + offsetX;
int newY = y + offsetY;
if (newX >= 0 && newX < image.Width && newY >= 0 && newY < image.Height)
{
var pixelColor = pixels[newX, newY];
rTotal += pixelColor.GetChannel(0);
gTotal += pixelColor.GetChannel(1);
bTotal += pixelColor.GetChannel(2);
pixelCount++;
}
}
}
blurredPixels[x, y].SetChannel(0, Convert.ToUInt16(rTotal / pixelCount));
blurredPixels[x, y].SetChannel(1, Convert.ToUInt16(gTotal / pixelCount));
blurredPixels[x, y].SetChannel(2, Convert.ToUInt16(bTotal / pixelCount));
}
return blurredImage;
}
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public void SaveImage(Stream fileStream)
{
var file = File.Create("image.png");
fileStream.CopyToAsync(file);
file.Close();
}
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public byte[] GetSimpleImage()
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{
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return File.ReadAllBytes("static/small-image.png");
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}
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public byte[] GetBigImage()
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{
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return File.ReadAllBytes("static/big-image.png");
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}
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}
}