Selecting ROI in a video file

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Praneetha Anand Goutham
回答： Hope Q 2019-10-28
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.

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Hope Q
Hope Q 2019-10-28
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

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