I need a direction: I did an exteriment with underwater camera GOPRO 7 and now I need to measure the size of the object I capture under water, basically its a cysinder with the known diameter. But the video was made on angle and I want to straighten the video so whenever I extract images it will be straight.
I did bit of the research and I came to know that I should learn camera calibration which then remove the distortion from the images. Hence I watched few you tube videos where people are using "camera calibrator app" to extract the parameter of the camera.
I did the same thing with checker board and extract the information but I would like to know what is next? how to run the corrections on the images?
Hope I will get the answer!