Swipe finger over particular portion of image and identify swiped area

[nagavital]

I need to swipe finger over particular  poriotn of an image and change selected portion to some transperent color on top of image. Can we achieve this in PowerApps?

My actual requirement is, user need to Swipe finger over particular part of the image and that part should be read by OCR and store that text in our repo. I'm thinking to do reading of selected part of image on server, but to server i need to give selected portion of image along with image.  Need ability to identify swiped portion