Comparing and matching random portion of a two images autonomously

Hi community,

I am working on a project and I need to compare two photographs of same thing at different points of time, position of objects won't change but the frame might change, I want to compare and match certain portion of one image to the other autonomously.... How can I do that

Note: The birghtness value of certain pixels may vary

Answer 1

[KALYAN ACHARJYA]

"need to compare two photographs of same thing at different points of time,position of objects won't change but the frame might change, I want to compare and match certain portion of one image to the other autonomously"

It may helps (any One):

1. Subtraction (Back ground Elimination)
2. Structural Similarity Index (SSIM)
3. Histogram Comparision