实现图片像素点的取反操作

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#include <stdio.h>

#include <opencv/cv.h>

#include <opencv/highgui.h>

 int main(int argc, char ** argv)

{      IplImage *pImage;

        int i,j;

        if (argc != 3)

       {

         printf("Format Error:  ./run input.bmp  output.bmp\n");

         return 1;

        }

       if((pImage = cvLoadImage(argv[1], 1)) == 0)             //加载图片

       {

         printf("Load Picture Failed!(%s)\n", argv[1]);

       }

      for (i = 0; i < pImage->height; i++)

         for( j = 0; j < ((pImage->width*3 + 3)/4)*4; ++j)         //注意字节对齐

          {

            *(pImage->imageData + i*((pImage->width*3 + 3)/4)*4 + j) ^= 0xFF;

          }

       cvSaveImage(argv[2], pImage, 0);               //保存图片

       printf("Image Process OK!\n");

       return 0;

}

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makefile：  gcc main.c -o run -lopencv_highgui -Wall