How to extract matching coordinates of a stitched and set of original images?

[KALYAN ACHARJYA]

What does it mean "matching coordinates"?

[Eberechi ICHI]

I mean i want to match the stitched image with with original images (20 of them) and extract the matched pixel cordinates. kind of mapping them based on their pixel cordinates.

Answer 1

[KALYAN ACHARJYA]

First Case: Pixel to Pixel comparision

Simplest is Do the subtraction: The nearly zero or zero in the differenc result signify the match between intensities on the particular coordinates.

diff_result=OriginalGrayImage-PresentGrayImage
% Do all operation 
% Save the result, if array result consider cell array to save the result
% You can easily get the co-ordinates where oixels values are same in both image
[r_cor,c_cor]=find(diff_result==0);

Note the pattern matching is different

2nd Case:

Template Matching : normxcorr2

3rd Case:

For 20 images, call images one by one and do the operation along with save the result.

There are so many threads related to call multiple images, please refer

https://in.mathworks.com/matlabcentral/answers/755559-image-segmentation-and-saving-image?s_tid=srchtitle

Hope it helps!