WPF图像锐化:拉普拉斯算子
作者:互联网
- 原图和效果图:
- 代码
// 锐化:拉普拉斯算子
public static ImageSource GrayDataToImageSharpen(this ushort[,] grayData, int[,] colorMap, int maxValue = 65535)
{
int width = grayData.GetLength(0); // 行数
int height = grayData.GetLength(1); // 列数
int[] Laplacian = new int[9] { -1, -1, -1, -1, 9, -1, -1, -1, -1 }; // 拉普拉斯算子
WriteableBitmap writeableBitmap = new WriteableBitmap(width, height, 96, 96, PixelFormats.Bgr32, null);
Int32Rect rect = new Int32Rect(0, 0, width, height);
byte[] pixels = new byte[width * height * writeableBitmap.Format.BitsPerPixel / 8];
int gray, r, g, b, index;
for (int i = 1; i < width - 1; i++)
{
for (int j = 1; j < height - 1; j++)
{
gray = 0;
index = 0;
int pixelOffset = (i + j * width) * writeableBitmap.Format.BitsPerPixel / 8;
for (int col = -1; col <= 1; col++)
{
for (int row = -1; row <= 1; row++)
{
gray = gray + grayData[i + row, j + col] * Laplacian [index];
index = index + 1;
}
}
gray = gray * 255 / maxValue;
gray = gray > 255 ? 255 : gray;
gray = gray < 0 ? 0 : gray;
r = colorMap[gray, 0];
g = colorMap[gray, 1];
b = colorMap[gray, 2];
pixels[pixelOffset] = (byte)b;
pixels[pixelOffset + 1] = (byte)g;
pixels[pixelOffset + 2] = (byte)r;
pixels[pixelOffset + 3] = 255;
}
}
int stride = (width * writeableBitmap.Format.BitsPerPixel) / 8;
writeableBitmap.WritePixels(rect, pixels, stride, 0);
return writeableBitmap;
}
标签:gray,锐化,int,writeableBitmap,width,算子,WPF,height,pixels 来源: https://blog.csdn.net/u012366767/article/details/87936452