draw rectangle on extracted region

Question

Nataliya 2015-6-21

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/224697-draw-rectangle-on-extracted-region

评论： Image Analyst 2015-6-21

Hello everyone, I have extracted the moving region by subtracting the video frames. Now I want to draw a rectangle over the extracted part but the problem is the pixels are not connected, thus I can't use regionprops() because it gives several boxes due to disconnected pixels. I have inserted the image where I want to draw rectangle over the extracted moving pendulum area. How can I do this. Please help. Thanks.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Walter Roberson 2015-6-21

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/224697-draw-rectangle-on-extracted-region#answer_183435

在 MATLAB Online 中打开

vertprofile = any(YourImage>0,1);
bbox_x_low = find(vertprofile, 1, 'first');
bbox_x_high = find(vertprofile, 1, 'last');
horzprofile = any(YourImage>0,2);
bbox_y_low = find(horzprofile, 1, 'first');
bbox_y_high = find(horzprofile, 1, 'last');

The way to proceed from there depends upon how you are going to draw the rectangle.

1 个评论
显示 -1更早的评论隐藏 -1更早的评论

Image Analyst 2015-6-21

By the way, Nataliya, you can use regionprops, you'd just get all the bounding boxes and just use max and min like Walter shows, Or you could call bwconvull() to get just one region then call regionprops(). But unless you're calling regionprops for some other reason, I'd just go with Walter's method.

请先登录，再进行评论。