how to trace black and white region separately in an binary image

hai i have binary image (capture 1) and i need to trace all white region in vertical and all black region in horizontal lik the image i attached.(capture 2) and from that i need to detect fault in both hozintal and vertical (capture 3). kindly suggest me

Answer 1

[Constantino Carlos Reyes-Aldasoro]

generate 2 images, one at which you threshold for bright values, and one for which you threshold for dark values. Once you have that you can label the regions with bwlabel. Find the locations with regionprops. The links would follow the coordinates of the regions detected previously. Once you have those links and difference between the coordinates you can look for variations in the distances of neighbouring elements. If there are no defects, all the distances should be regular, with defects there will be smaller and larger distances.