is programming image comparision is tough?

Question

i am doing an android app of image based authentication., for authentication i am using some integer id for each image., and it working fine... but now id comparision by image processing comparsion... i want full exact code to compare two images for authentication purpose... in android

Answer 1

This is a very difficult concept as you have to compare individual pixel colors on each image.

Answer 2

Image comparison is indeed a sophisticated process to do well. You can't just compare an image pixel by pixel unless you are comparing pictures just to see if they are exact copies of each other. There are always subtle differences between the same subject captured at different times. There are indeed some algorithms you can use to compare how "similar" two images are, but then the comparison boils down to a percentage of confidence that the two images have similar enough objects in them ... you can say you are for instance 80% sure the two objects are the same. What percentage confidence is enough? 80%, 90%, 95%, 99.9%, or even 99.999%? Look into image processing and object identification in imaging. This is a legitimate area of research in many universities.

Answer 3

convinced you are able to. this application will study 2 photos pixel smart. check out the header report for better information because this is been what 2 or 3 years when you consider that I had a fingers on "c"