openCV生成灰度图像示例

临时用到，对openCV还不熟，慢慢研究。

#include "cxcore.h"

IplImage* pImg = cvCreateImage( cvSize( width, height ), 8, 1 );

cvZero( pImg );

for (int i = 0; i < width; ++i)

    for (int j = 0; j < height; ++j)

    {

        CvPoint pt = cvPoint(i, j);

        uchar* temp = &((uchar*)(pImg->imageDate /* +distance */))[pt.x];

        temp[0] = static_cast<int>( value(0~255) );

    }

cvSaveImage( filename, pImg);

cvReleaseImage(&pImg);