OpenCV学习笔记_用指针操作图像元素

来源：互联网发布：淘宝互踩编辑：程序博客网时间：2024/05/15 17:43

#include <cv.h>#include <highgui.h>using namespace std;int main(void){cvNamedWindow("demo");IplImage* src = cvCreateImage(cvSize(210, 210), IPL_DEPTH_8U, 3);//三通道图像元素置0， 类似cvZerofor (int y = 0; y < src->height; y++){uchar* ptr = (uchar*)(src->imageData + y * src->widthStep);for (int x = 0; x < src->width; x++){ptr[3 * x] = 0;ptr[3 * x + 1] = 0;ptr[3 * x + 2] = 0;}}//在图像选定空间设置颜色for (int y = 5; y <= 180; y++){uchar* ptr = (uchar*)(src->imageData + y * src->widthStep);for (int x = 20; x <= 160; x++){ptr[3 * x] = x + y;ptr[3 * x + 1] = 255 - x - y;ptr[3 * x + 2] = y;}}cvShowImage("demo", src);//单通道图像元素设置IplImage* temp = cvCreateImage(cvSize(210, 210), IPL_DEPTH_8U, 1);cvZero(temp);for(int y = 0; y < temp->height; y++){uchar* ptrtemp = (uchar*)temp->imageData + y * temp->widthStep;for(int x = 0; x < temp->width; x++){ptrtemp[x] = 10;}}cvShowImage("demo1", temp);cvWaitKey();return 0;}

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