How to find similar or identical images into two directories?

Friends, I need to compare files of two directories to find similar or identical images between them. They may have color, shape or be contained within one another. Could someone help? You can generate it? Thank you very much.

[Dilsha Hyderali]

How to apply clustering on the feature extrcted files?

Answer 1

[Dima Lisin]

If you are looking for identical images, then you can simply read each pair of images and check for element-wise equality. Otherwise, it depends on how you define "similar". Here is one example, which shows how to find similar images based on color histograms.

[André Faria]

Thank Dima Lisin, I think adopting the similarity, I automatically find the identical, right? How do i find similarity comparing black and white images with color images? The SIFT is a good choice?