Selecting ROI in a video file

Hello,

I am processing a video file to track the displacement of an object. I am manually selecting the ROI now using imrect, but want to do an automatic selection that has a defined size and position of the ROI. Does someone have a code for this? or can suggest something?

It would be of great help if you could share something please.

Thank you.

Answer 1

[Hope Q]

Please note that imrect is no longer recommended.

https://www.mathworks.com/help/images/ref/imrect.html?s_tid=srchtitle

If the region is known, i.e. if you can specify the desired rows and columns of the image, you can simply extract those rows and columns:

regionImage = frameImage(rowList,columunList);

If you wish to have an ROI that you can manipulate after it is initialized, consider the roi object rectangle method.

https://www.mathworks.com/help/images/ref/images.roi.rectangle.html