Some questions about the vision inspection project

Try to detect the red rectangular part of the picture.
But I am poor at using openmv tools.
Please give me some tips on how to proceed with this project.

Hi, you could use find_blobs and the threshold editor to find the color the rectangle.

When using find_blobs (), is it not possible to set two roi?

No, a single ROI.
http://docs.openmv.io/library/omv.image.html?highlight=find_blobs#image.image.find_blobs