彩色图像的直方图均衡化

例：彩色图像的直方图均衡化

int i;
IplImage *pImageChannel[4] = { 0, 0, 0, 0 };
pSrcImage = cvLoadImage( "test.jpg", 1 ) ; 
IplImage *pImage = cvCreateImage(cvGetSize(pSrcImage), pSrcImage->depth, pSrcImage->nChannels);
if( pSrcImage )
{
	for( i = 0; i < pSrcImage->nChannels; i++ )
	{
		pImageChannel[i] = cvCreateImage( cvGetSize(pSrcImage), pSrcImage->depth, 1 );
	}
	// 信道分离
	cvSplit( pSrcImage, pImageChannel[0], pImageChannel[1],
		pImageChannel[2], pImageChannel[3] );
	for( i = 0; i < pImage->nChannels; i++ )
	{
		// 直方图均衡化
		cvEqualizeHist( pImageChannel[i], pImageChannel[i] );
	}
	// 信道组合
	cvMerge( pImageChannel[0], pImageChannel[1], pImageChannel[2],
		pImageChannel[3], pImage );
	// ……图像显示代码（略）
	// 释放资源
	for( i = 0; i < pSrcImage->nChannels; i++ )
	{
		if ( pImageChannel[i] )
		{
			cvReleaseImage( pImageChannel[i] );
			pImageChannel[i] = 0;
		}
	}
	cvReleaseImage( pImage );
	pImage = 0;
}