ricbra's profile - activity

We release approximately 1000 fish every year. But that is only in my region, for the whole country this is a lot more. False positives is no problem, if I could filter the best 20 matching pictures out of a few 1000 would be awesome. There are some fish which look quite a like, so these are with the eye even hard to find.

I've been reading myself into this SURF thing, looks really promising. If anyone else got some more tips or tricks let me know.

I updated the pictures with some red lines to make myself clear. In Dutch we call scales "schubben", but I don't know any other word in English to describe it.

Btw. it is possible by hand. But since a lot of fish gets released every year, it gets harder and harder to recognise them by hand. This is all volunteer work so I'm trying to improve things a bit :). Also, because it is non-profit I shouldnt be in any problems regarding commercial use I guess.

Hi,

I'm working on a project to monitor our fish population. Every year we release new young carp. We ask fishermen to send us photographs of every catch to see where they go. We identify these fish by the scale pattern. Every fish is unique in its scale pattern.This is quite a lot of work to do by hand.

Is it possible to detect similarity in scale pattern with OpenCV? Any pointers on how to accomplish this? I've a decent background in programming, but am a little stuck where to start.

Example of one fish release picture and catch picture (I marked the scale pattern with red, to show how we recognise the fish on pictures):

To demonstrate the uniqeness of the scale pattern per fish, this is a different one: