Determine areas containig text or pattern

[prozakaz]

How to find text or car number on image using php and imagemagick?
I trying to find car numbers area and crop it so from this

Get that


The pattern always the same



Is there any solution to do that in php?

[fmw42]

IM's compare function will do a compare, but it is not rotationally nor scale insensitive. So you must have the same orientation and scale. But some one recently is trying to add a new invariant compare function. But I do not know how far along that is. see
viewtopic.php?f=2&t=26530

If the scale and rotation do not change, then you can crop out the license place and use compare with subimage-search to find it. See
http://www.imagemagick.org/Usage/compare/
http://www.imagemagick.org/script/compare.php
viewtopic.php?f=1&t=14613&p=51076&hilit ... ric#p51076 (but you now need to add -subimage-search).

You might try OpenCV.