Algorithm for selecting the same things?

Question

infographics

I want to make an algorithm for selecting the same things (color, shape, for example, selecting bags of the same color and the same shape). Actually the question is: are there any libs / algorithms for visual analysis and where to start digging? The programming language is not important.

Answer 1

red bags of the same color

?

Answer 2

You can probably start by comparing images by color histograms
. At one time I came across such a library .
Also helpful:
keypoint extraction
keypoint matching
Scientific:
Semantic Texton Forests for Image Categorization and Segmentation
Fast Keypoint Recognition using Random Ferns

Answer 3

look in the direction of OpenCV and further, for example, in the direction of searching for identical images (you can try different methods: histograms, bag of words, etc.)
for example, recently an article ran through - habrahabr.ru/post/198338/