1.转换16位像素值为Bitmap,不带颜色空间信息（如RGB）的16位图像

 public static Bitmap Convert16BitGrayscaleToBitmap(byte[] grayscale16Data, int width, int height){// 创建一个8位灰度Bitmap用于存储转换后的图像Bitmap bitmap = new Bitmap(width, height, PixelFormat.Format8bppIndexed);// 初始化色彩映射表，确保0-255范围映射正确ColorPalette palette = bitmap.Palette;for (int i = 0; i < 256; i++)palette.Entries[i] = Color.FromArgb(i, i, i);bitmap.Palette = palette;// 锁定Bitmap以便直接访问其像素数据BitmapData bitmapData = bitmap.LockBits(new Rectangle(0, 0, width, height),ImageLockMode.WriteOnly,bitmap.PixelFormat);IntPtr ptr = bitmapData.Scan0;int bytesPerPixel = bitmapData.Stride / width; // 应该是1，对于8bppint bufferSize = bitmapData.Stride * height;unsafe{byte* p = (byte*)ptr.ToPointer();for (int y = 0; y < height; y++){for (int x = 0; x < width; x++){// 这里简化处理，直接读取16位数据并缩小到8位，实际应用中需要考虑数据映射short pixelValue = (short)(grayscale16Data[y * width * 2 + x * 2] | grayscale16Data[y * width * 2 + x * 2 + 1] << 8);// 简单映射，实际情况可能需要更复杂的转换来保留更多细节//byte grayValue = (byte)(pixelValue >> 8); // 粗略转换，丢失高位信息//byte grayValue = (byte)Math.Min(255, (pixelValue / 256f) * (1 + 20.5f));p[y * bitmapData.Stride + x] = GammaCorrectedMap(pixelValue);}}}bitmap.UnlockBits(bitmapData);return bitmap;}

伽马校正

 static byte GammaCorrectedMap(short pixelValue, float gamma = 2.2f){// 将像素值转换为0~1之间的浮点数float normalizedValue = pixelValue / 65535f;// 应用伽马校正，然后重新缩放到0~255return (byte)Math.Round(Math.Pow(normalizedValue, 1 / gamma) * 255);}

2.转换16位像素值为Bitmap,带颜色空间信息（如RGB）的16位图像

public static Bitmap Convert16BitGrayscaleToBitmapColour(byte[] pixelData, int width, int height){// 确保数据长度正确if (pixelData.Length != width * height * 2){throw new ArgumentException("Pixel data length does not match the specified dimensions.");}// 创建Bitmap对象Bitmap bitmap = new Bitmap(width, height, PixelFormat.Format16bppRgb565);// 锁定Bitmap以便写入像素数据BitmapData bitmapData = bitmap.LockBits(new Rectangle(0, 0, width, height),ImageLockMode.WriteOnly,bitmap.PixelFormat);// 获取Bitmap的字节级指针IntPtr ptr = bitmapData.Scan0;// 将像素数据复制到BitmapSystem.Runtime.InteropServices.Marshal.Copy(pixelData, 0, ptr, pixelData.Length);// 解锁Bitmapbitmap.UnlockBits(bitmapData);return bitmap;}

3.转换8位像素值为Bitmap

public static Bitmap ConvertToBitmap8Bit(byte[] pixelData, int width, int height){// 确保数据长度正确if (pixelData.Length != width * height){throw new ArgumentException("Pixel data length does not match the specified dimensions.");}// 创建一个Bitmap对象，指定像素格式为8位灰度Bitmap bitmap = new Bitmap(width, height, PixelFormat.Format8bppIndexed);// 设置调色板为灰度调色板var palette = bitmap.Palette;for (int i = 0; i < 256; i++){palette.Entries[i] = Color.FromArgb(i, i, i);}bitmap.Palette = palette;// 锁定Bitmap以便写入像素数据BitmapData bitmapData = bitmap.LockBits(new Rectangle(0, 0, width, height),ImageLockMode.WriteOnly,bitmap.PixelFormat);// 获取Bitmap的字节级指针IntPtr ptr = bitmapData.Scan0;// 将像素数据复制到BitmapSystem.Runtime.InteropServices.Marshal.Copy(pixelData, 0, ptr, pixelData.Length);// 解锁Bitmapbitmap.UnlockBits(bitmapData);return bitmap;}