Opencv 图像填充

Dear 丶 2023-06-30 08:47 27阅读 0赞

期望效果：  
在image指定的矩形区域，填充纯色；

函数  
Mat filledROIMat(Mat srcImage0, Rect rectROI)  
\{  
Mat srcImage = srcImage0.clone();  
Point2i pt1;  
Point2i pt2;  
pt1.x = rectROI.x; pt1.y = rectROI.y;  
pt2.x = rectROI.width; pt2.y = rectROI.height;  
/

rectangle(srcImage, pt1, pt2, cv::Scalar(0), -1);  
  
return srcImage;  
\}

测试代码：  
void Test3()  
\{  
Mat src, src\_gray, binImg;  
//1.读入并检测  
src = imread("D:/images/lena.jpg", 1);  
Mat dst = filledROIMat(src, Rect(100,100,130,350));

imshow("dst", dst);  
waitKey(0);  
destroyAllWindows();  
\}

效果图：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodWZhYw_size_16_color_FFFFFF_t_70][]

补充一个多边形填充方法

void fillPoly( Mat& img, const Point\*\* pts, const int\* npts, int ncontours, const Scalar& color, int line\_type, int shift, Point offset )  
参数：  
pts 指向多边形的数组指针  
npts 多边形的顶点个数的数组  
contours 组成填充区域的线段的数量  
其他参数同line()参数

示例代码：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodWZhYw_size_16_color_FFFFFF_t_70 1][]

Demo效果图：

![watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodWZhYw_size_16_color_FFFFFF_t_70 2][]

[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodWZhYw_size_16_color_FFFFFF_t_70]: https://img-blog.csdnimg.cn/20200116093218412.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodWZhYw==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodWZhYw_size_16_color_FFFFFF_t_70 1]: https://img-blog.csdnimg.cn/20200117105832307.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodWZhYw==,size_16,color_FFFFFF,t_70
[watermark_type_ZmFuZ3poZW5naGVpdGk_shadow_10_text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodWZhYw_size_16_color_FFFFFF_t_70 2]: https://img-blog.csdnimg.cn/20200117105927319.png?x-oss-process=image/watermark,type_ZmFuZ3poZW5naGVpdGk,shadow_10,text_aHR0cHM6Ly9ibG9nLmNzZG4ubmV0L3NodWZhYw==,size_16,color_FFFFFF,t_70