How to check if image exists in Gallery or not?

Question

In my application when a user captures the image before saving into the gallery.

I want to check is there any image matches with the current image (at least 50%). If any image found get the image from gallery and display to the user.

I am very new to android development. Can anyone help me out to do above task.

when you capture an image at that time set name then save in gallery and then check from logic by name is exited or not in gallery. — Jackey kabra, Dec 05 '17 at 13:28
So if an image with a dog is captured then look for images with a dog on it? Anything else? — greenapps, Dec 05 '17 at 13:35
Thanks for the quick reply, my logic should be on image pixels not name — user1772005, Dec 05 '17 at 13:35

score 1 · Answer 1 · answered Dec 05 '17 at 14:11

You'll have to use a Java library for this. I suggest taking a look at this thread.

If you'd like to develop something on your own, the basic idea is this. To compare two images, represent each of them as a matrix of pixels and compute similarity between those two matrices. If you do choose to implement it yourself, take a look at matrix similarity, cosine similarity in particular. A very simple example is here.

Good luck!

How to check if image exists in Gallery or not?

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