How to find object perimeter/bounding box perimeter?

2 次查看（过去 30 天）

显示更早的评论

Dominic 2017-8-13

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/352586-how-to-find-object-perimeter-bounding-box-perimeter

评论： Image Analyst 2018-1-6

采纳的回答： Image Analyst

Can some one please provide me a code that finds a ratio between object perimeter and bounding box perimeter:

ratio = object perimeter / bounding box perimeter

2 个评论
显示无隐藏无

KSSV 2017-8-13

What data you have?

Dominic 2017-8-13

I have five blobs in a binary image.

Now i want to divide the perimeter of blobs by their corresponding bounding box perimeter.

请先登录，再进行评论。

请先登录，再回答此问题。

采纳的回答

Image Analyst 2017-8-13

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/352586-how-to-find-object-perimeter-bounding-box-perimeter#answer_277834

See https://www.mathworks.com/matlabcentral/answers/165038-circularity-of-an-image#answer_161171

5 个评论
显示 3更早的评论隐藏 3更早的评论

sana trimeche 2018-1-6

the widths = X max - X Min then widths= bb(3:4:end)- bb(1:4:end); NO ?

Image Analyst 2018-1-6

No. Why do you think bb(3) is the x max value? You can tell whomever told you that, that they're wrong because you and I can both read regionprops and see that "the vector [ul_corner width], ul_corner specifies the upper-left corner of the bounding box in the form [x y z ...]. width specifies the width of the bounding box along each dimension in the form [x_width y_width ...]"

So bb is [xLeft, yTop, xWidth, yHeight].

请先登录，再进行评论。