jpeg-to-uint8-mat
Step 0: Resize:https://www.simpleimageresizer.com/resize/jpgStep 1: This would turn jpeg to ppm-p6.https://onlineconvertfree.com/zh/convert-format/jpg-to-ppm/step2: This turns ppm-p6 to ppm-p3:https://thomasebsmith.github.io/ppm-converter/step3: use ppm_load() function in this file:https://github.com/julyfun/find-light-circle/blob/28de4d34d8a8063486688e5545778720e6fb9798/main.