在vb.net中将jpg彩色图像转换为黑色和白色图像 [英] convert jpg color image to black and whirte image in vb.net

问题描述

请告诉我如何在质量良好的vb.net Windows应用程序中将jpg彩色图像转换为黑色和白色图像.

Kindly tell me how to convert jpg color image to black and whirte image in vb.net windows application with good quality.

推荐答案

此处: http://www.switchonthecode.com/tutorials/csharp- tutorial-convert-a-color-image-to-grayscale [

There is a tutorial on this here: http://www.switchonthecode.com/tutorials/csharp-tutorial-convert-a-color-image-to-grayscale[^]
It took a very, very simple Google to find this; why did you not at least try that?

尝试

public Bitmap ConvertToGrayscale(Bitmap source)
{
  Bitmap bm = new Bitmap(source.Width,source.Height);
  for(int y=0;y<bm.height;y++)>
  {
    for(int x=0;x<bm.width;x++)>
    {
      Color c=source.GetPixel(x,y);
      int luma = (int)(c.R*0.3 + c.G*0.59+ c.B*0.11);
      bm.SetPixel(x,y,Color.FromArgb(luma,luma,luma));
    }
  }
  return bm;
}

参考链接:-将彩色图像转换为灰度 [

Reference Link :- convert a colour image to grayscale[^]

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