24位图像到1位图像 [英] 24bit image to 1bit image

问题描述

这是我的代码：

public static Bitmap ConvertTo1Bit(Bitmap input)
        {
            var masks = new byte[] { 0x80, 0x40, 0x20, 0x10, 0x08, 0x04, 0x02, 0x01 };
            var output = new Bitmap(input.Width, input.Height, PixelFormat.Format1bppIndexed);
            var data = new sbyte[input.Width, input.Height];
            var inputData = input.LockBits(new Rectangle(0, 0, input.Width, input.Height), ImageLockMode.ReadOnly, PixelFormat.Format24bppRgb);
            try
            {
                var scanLine = inputData.Scan0;
                var line = new byte[inputData.Stride];
                for (var y = 0; y < inputData.Height; y++, scanLine += inputData.Stride)
                {
                    Marshal.Copy(scanLine, line, 0, line.Length);
                    for (var x = 0; x < input.Width; x++)
                    {
                        data[x, y] = (sbyte)(64 * (GetGreyLevel(line[x * 3 + 2], line[x * 3 + 1], line[x * 3 + 0]) - 0.5));
                    }
                }
            }
            finally
            {
                input.UnlockBits(inputData);
            }

我遇到问题  "

I'm facing problem in  "

scanLine += inputData.Stride

错误显示"+ =操作数无法应用于类型"和"系统"。 IntPtr和int""
$


如何解决这个问题？

the error shows "+= operand can't be applied on type ""System.IntPtr and int""

how can I solve this problem?

推荐答案

Castorix有更好的整体解决方案，但您问题的直接答案是

Castorix has a better overall solution, but the immediate answer to your question is

      scanLine = IntPtr.Add（scanLine，inputData.Stride）;

     scanLine = IntPtr.Add( scanLine, inputData.Stride );

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