【openCV】基础操作

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读取图片

Mat srcImage = imread("image1.jpg");

判断图片是否为空

srcImage.empty();

转为灰度图

Mat grayImage;cvtColor(srcImage,grayImage,CV_BGR2GRAY);

获取/修改灰度图于(i,j)像素值

grayImage.at<char>(i,j) = 0;

显示图片

imshow("Picture",grayImage);    waitKey(0);

输出图片

imwrite("gray.jpg",grayImage);

释放图片

srcImage.release();

读取图片

IplImage *srcImage = cvLoadImage("potota.jpg", CV_LOAD_IMAGE_UNCHANGED);

创建图片

IplImage *grayImage =  cvCreateImage(cvGetSize(src), IPL_DEPTH_8U, 1);

清空图片

cvZero(*grayImage);

转为灰度图

cvCvtColor(srcImage, grayImage, CV_BGR2GRAY);

转为二值图

IplImage *binImage = cvCreateImage(cvGetSize(grayImage), IPL_DEPTH_8U, 1);cvZero(*binImage); cvThreshold(grayImage,*binImage,128,1,CV_THRESH_BINARY_INV);

获取图片大小

CvSize size = cvGetSize(srcImage);int h = size.heightint w = size.width

获取/修改灰度图于(i,j)像素值

CV_IMAGE_ELEM(src,uchar,i,j) = 0;

复制图像

cp_src = cvCreateImage(cvGetSize(srcImage), IPL_DEPTH_8U, 1);cvCopy(src,cp_src,NULL);

获取(i,j)像素信息

CvScalar s = cvGet2D(srcImage,i,j);

修改(i,j)像素信息

s = CV_RGB(0,255,0);cvSet2D(srcImage,i,j,s);

显示图片

cvShowImage("Skeleton",srcImage);cvWaitKey(0);cvDestroyWindow("Skeleton");

释放图片

cvReleaseImage(&srcImage);

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