how can we calculate surface area for this leaf in matlab?

12 次查看（过去 30 天）

显示更早的评论

nida 2014-3-31

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/123902-how-can-we-calculate-surface-area-for-this-leaf-in-matlab

评论： Image Analyst 2024-7-14，2:21

采纳的回答： Image Analyst

only the leaf

4 个评论
显示 2更早的评论隐藏 2更早的评论

Navoda 2024-7-13，19:09

This answer not clear to me

Image Analyst 2024-7-14，2:21

@Navoda If you have any more questions, then attach your image in a new discussion thread with the paperclip icon after you read this:

TUTORIAL: How to ask a question (on Answers) and get a fast answer

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 2014-3-31

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/123902-how-can-we-calculate-surface-area-for-this-leaf-in-matlab#answer_131540

Which leaf? There are lots of leaves in that image, and they're all green. That's the problem. So you can either hand trace the leaf with imfreehand(). Demo of imfreehand are attached below in blue.

Or you can try texture segmentation because the giant leaf has a different texture than the "background" leaves. You can use stdfilt or entropyfilt() to do texture segmentation.

Once you've processed it to a point where you can threshold it then you can use regionprops, as shown in my image segmentation tutorial: http://www.mathworks.com/matlabcentral/fileexchange/?term=authorid%3A31862 I also have color segmentation demos there but since all your leaves are so close in color, that probably won't work.

Finally, to get a "real world" area, instead of pixels, you'll need to spatially calibrate and I attach my demo (below in blue) to show you how to do that.