Finding similar products based on images in aliexpress.com

In [login to view URL] there is multiple sellers selling the same products. See this link to see what I'm talking about: [login to view URL] Alot of pink hello kitty watches. Many of them are the same products, they use the same product images, BUT they might have small differences, like dimension/scale and small watermarks. What I need, is a scraper where I can input two things: 1. a spesific searchstring, like "pink hello kitty watch" 2. an image that i want to find similar products of. example image: [login to view URL] The scraper should then go through the [login to view URL] searchresults for the searchstring (in this case "pink hello kitty watch"), and find all the sellers that sells this spesific product. This means you will have to compare all the images to the one input in the second step above, and if the image is close enough (you will have to determine what will give good results, and take into account dimension/scale/watermarkdifferences), it will display the list of matched products (url, image and price). List should be default ordered as price ascending. What will be the purpose of this scraper? If my regular seller stops selling the product, I need a fast way of finding the same product in [login to view URL] again, and cheapest possible. Also I would use it to find lower prices for the products I'm already selling.