1、openCV任意何形狀感興趣區(qū)域（ROI）提取圖像感興趣區(qū)域（ROI）提取主要使掩模來進(jìn)。掩模是值圖像，感興趣區(qū)域的掩模值設(shè)置為255，感興趣區(qū)域的掩模值為0獲取掩模的法主要有兩種法 使opencv中Mat函數(shù)法,調(diào)Mat(Rect).setTo法設(shè)置掩模mask(rect).setTo(255);123法 在全為0的原始掩模中畫個封閉區(qū)域，使漫填充算法填充封閉區(qū)域，將封閉區(qū)域的值都設(shè)置為255，實(shí)現(xiàn)掩模的提取下對矩形、橢圓，有向的矩形，輪廓進(jìn)提取1.矩形感興趣區(qū)域提取（1）調(diào)Mat(Rect).setTo法設(shè)置掩模使法對矩形感興趣區(qū)域進(jìn)提取例代碼如下：#include#includeusin

2、g namespace cv;/1MAT 255int main()Mat mask = Mat:zeros(image.size(), CV_8UC1);Rect rect;rect.x = 100;rect.y = 100;Mat img2;return 0;（2）使漫填充算法獲取矩形ROI思路：1）新建個值全為零的掩模圖像（全是的，值為0）2）在掩模圖像上畫出矩形的邊界（邊界值為255）3）選取矩形的中作為種點(diǎn)，使漫填充算法將矩形的內(nèi)部填充為（255），最后得到掩模圖像，使掩模實(shí)現(xiàn)感興趣區(qū)域提取。#includerectangle(mask, rect, Scalar(255);Poin

3、t seed;return 0;任意何形狀 ROI提取任意何形狀感興趣區(qū)域的提取主要使法。提取的關(guān)鍵是畫出何形狀的邊界。（1）旋轉(zhuǎn)的矩形（CvBox2D）、橢圓(RotatedRect)、圓的感興趣區(qū)域的提取例代碼如下：#include#includeusing namespace cv;#define WIDTH 256#define HEIGHT 256void DrawBox(CvBox2D box, IplImage* img)for (i = 0; i4; i+)cvBoxPoints(box, point); /計(jì)算維盒頂點(diǎn)Mat image = imread(dot_link_1

4、1.jpg);1.CvBox2D）/IplImage* imask = &IplImage(mask);/DrawBox(box,imask);3.畫圓Point center;center.x = 100;center.y = 100;float radius = 50;circle(mask, center, radius, Scalar(255);Point seed;seed.x = center.x;seed.y = center.y;/漫填充/pi的值表為 v(pi),if v(seed)-loDiffv(pi)v(seed)+upDiff, pinewValfloodFill(m

5、ask, seed, 255, NULL, cvScalarAll(0), cvScalarAll(0), CV_FLOODFILL_FIXED_RANGE);image.copyTo(maskImage, mask);imshow(mask, mask);imshow(img2, maskImage);waitKey();（2）感興趣區(qū)域?yàn)檩喞奶崛∷悸罚?）調(diào)opencv的畫圖函數(shù)cvLine將輪廓中相鄰的點(diǎn)連接為區(qū)域2）獲取輪廓中，使漫填充算法填充例代碼如下：#includereturn;CvPoint* prePoint = (CvPoint*)cvGetSeqElem(seq, 0)

6、;CvPoint* lastPoint = (CvPoint*)cvGetSeqElem(seq, seq-total - 1);cvLine(grayImage, *prePoint, *lastPoint,cvScalar(255), 1, 8, 0);for (int i = 1; itotal; i+) p = (CvPoint*)cvGetSeqElem(seq, i);/cvSet2D(img, p-y, p-x, color);/4255int main()Mat image=imread(dot_link_11.jpg);Mat mask = Mat:zeros(image.s

7、ize(), CV_8UC1);CvMemStorage* storage = cvCreateMemStorage(0);/ CvSeq* contour = cvCreateSeq(CV_SEQ_ELTYPE_POINT, sizeof(CvSeq), sizeof(CvPoint), storage);CvSeqWriter writer;cvStartWriteSeq(CV_32SC2, sizeof(CvSeq), sizeof(CvPoint),storage,&writer);CV_WRITE_SEQ_ELEM(p2, writer);CV_WRITE_SEQ_ELEM(p3, writer);CV_WRITE_SEQ_ELEM(p4, writer);CV_WRITE_SEQ_ELEM(p5, writer);cvFlushSeqWriter(&writer);CvSeq* contour = cvEndWriteSeq(&writer);printf(contour.size=%d, contour-total);IplImage* imask = &IplImage(mask);IplImage* iimage =