OpenCV学习笔记——使用OpenCV访问图像数据

#include "cv.h"
#include "highgui.h"

void white(IplImage* img)
{
	for (int y = 0; y < img->height; y++)
	{
		uchar* ptr = (uchar*)(img->imageData + y*img->widthStep);
		for (int x = 0; x < img->nChannels*img->width; x++)
		{
			ptr[x] = 255;
		}
	}
}

void main()
{
	const char* imagename;
	IplImage* image = NULL;
	IplImage* out = NULL;
	imagename = "E:/0.bmp";
	image = cvLoadImage(imagename, 1);
	cvNamedWindow("原始图像", 1);
	cvShowImage("原始图像", image);
	white(image);
	cvNamedWindow("白色图像", 1);
	cvShowImage("白色图像", image);
	cvReleaseImage(&image);
	cvWaitKey(0);
	cvDestroyWindow("原始图像");
	cvDestroyWindow("白色图像");
}