similarily

How to match Tagged items based on "similarity"

I have a real question. I have a database with the schema as follows: item id description other junk tag id name item2tag item_id tag_id count Basically, each item is tagged as up to 10 things, with varying counts. There are 50,000 items and 50,000 tags, and about 500,000 entries in items2tag. I'd like to find, given one...

OpenCV / SURF How to generate a image hash / fingerprint / signature out of the descriptors?

There are some topics here that are very helpful on how to find similar pictures. What I want to do is to get a fingerprint of a picture and find the same picture on different photos taken by a digital camera. The SURF algorithm seams to be the best way to be independent on scaling, angle and other distortions. I'm using OpenCV with th...