Matlab: How can i find the minimum rotation rectangular area en image

In OpenCV, there is a function "minAreaRect".

I need to know the length and width of each leaf !!!!!

how to achieve?

Answer 1

[Image Analyst]

I think it'd be too difficult. You can probably get the area fraction of green in the image and that measure, though it's different, will probably be highly correlated and is a lot easier to find.

One other thing you can try is to get the Euclidean Distance Transform with bwdist() on the segmented green pixels, and then take a histogram of that. It will give you the average width of all the leaves.