基于opencv的图像增强函数(c++)

//======================================================================================\\ // 如果您对安装opencv或在vc6.0下配置opencv有疑问，请访问opencv中文网站: // http://www.opencv.org.cn/ //=======================================================================================// #include <cv.h> #include <highgui.h> #include <stdio.h> /*********************************************************************\ 函数名: Increase 功 能: 图像增强 参 数: src - 源图像(1通道) dst - 目图像(1通道) \*********************************************************************/ #define HDIM 256 // bin of HIST, default = 256 void Increase(IplImage** src, IplImage** dst){ int n = HDIM; // 计算直方图 CvHistogram *hist = cvCreateHist( 1, &n, CV_HIST_ARRAY, 0, 1 ); cvCalcHist( src, hist, 0, 0 ); // 生成累计直方图 int i; double val; double nn[HDIM]; for ( i = 0, val = 0; i < n; i++){ val = val + cvGetReal1D (hist->bins, i); nn[i] = val; } // 计算变换函数的离散形式 uchar T[HDIM]; int sum = (*src)->height * (*src)->width; // 源图像中象素点的总数 for( i = 0; i < n; i++ ){ T[i] = (uchar) (255 * nn[i] / sum); // 范围为 [0,255] } // 转换强度 *dst = cvCloneImage( *src ); CvMat *T_mat = cvCreateMatHeader( 1, 256, CV_8UC1 ); cvSetData( T_mat, T, 0 ); // 直接调用内部函数完成 look-up-table 的过程 cvLUT( *src, *dst, T_mat ); cvReleaseHist ( &hist ); } int main( int argc, char** argv ){ IplImage* src = cvLoadImage("sample.jpg", 0); if(src == NULL){ printf("Failed to load image.\n"); return 0; } IplImage* dst = cvCreateImage(cvGetSize(src), 8, 1); cvNamedWindow("src", 1); cvNamedWindow("dst", 1); Increase(&src, &dst); cvShowImage("src", src); cvShowImage("dst", dst); cvWaitKey(0); cvReleaseImage(&src); cvReleaseImage(&dst); cvDestroyWindow("src"); cvDestroyWindow("dst"); return 0; }