#include "cv.h"#include "highgui.h"#include 
    
     int ImageAdjust(IplImage *src,IplImage *dst,                double low,double high,        //x direction                double bottom,double top,    //y direction                double gamma);int main(void){    char *filename="lena.jpg";    IplImage *dst,*src = /blog.armyourlife.info/cvLoadImage(filename,0);    if(!src)    {        printf("Couldn't seem to Open %s, sorry/n",filename);        return -1;    }     cvNamedWindow( "src", 1 );    cvNamedWindow( "result", 1 );       // Image adjust    dst = cvCloneImage(src);    // 输入参数 [0,0.5] 和 [0.5,1], gamma=1    if( ImageAdjust( src, dst, 0, 0.5, 0.5, 1, 1)!=0)        return -1;       cvShowImage( "src", src );    cvShowImage( "result", dst );    cvWaitKey(0);    cvDestroyWindow("src");    cvDestroyWindow("result");    cvReleaseImage( &src );    cvReleaseImage( &dst );       return 0;}int ImageAdjust(IplImage* src, IplImage* dst,        double low, double high,   // X方向：low and high are the intensities of src        double bottom, double top, // Y方向：mapped to bottom and top of dst        double gamma ){    double low2 = low*255;    double high2 = high*255;    double bottom2 = bottom*255;    double top2 = top*255;    double err_in = high2 - low2;    double err_out = top2 - bottom2;    int x,y;    double val;    if(low<0 && low>1 && high <0 && high>1&&    bottom<0 && bottom>1 && top<0 && top>1 && low>high)        return -1;      // intensity transform    for( y = 0; y < src->height; y++)    {        for (x = 0; x < src->width; x++)        {            val = ((uchar*)(src->imageData + src->widthStep*y))[x];            val=pow((val - low2)/err_in, gamma)*err_out+bottom2;            if(val>255)                val=255;            if(val<0)                val=0; // Make sure src is in the range [low,high]            ((uchar*)(dst->imageData + dst->widthStep*y))[x] = (uchar) val;        }    }    return 0;}本文转自gnuhpc博客园博客，原文链接：http://www.cnblogs.com/gnuhpc/archive/2012/10/13/2722909.html，如需转载请自行联系原作者