OpenCV - Fastest method to check if two images are 100% same or not
I have done this task.
Compare file sizes.
Compare exif data.
Compare first 'n' byte, where 'n' is 128 to 1024 or so.
Compare last 'n' bytes.
Compare middle 'n' bytes.
Compare checksum
There are many questions over here which checks if two images are "nearly" similar or not. 
My task is simple. With OpenCV, I want to find out if two images are 100% identical or not. 
They will be of same size but can be saved with different filenames.