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Find rotated and scaled marker

Hi,

I've been looking into finding a simple marker

image description

on an image:

image description

There might be several markers in the image and the might be scaled and rotated. I've looked into SURF etc. both in openCV and simplecv but it looks like their are more targeted for more complex images.

Is there a possibility to match blob contours or so? Your help and hints on how to solve this will be greatly appreciated!

Find rotated and scaled marker

Hi,

I've been looking into finding a simple marker

image description

on an image:

image description

There might be several markers in the image and the they might be scaled and rotated. I've looked into SURF etc. both in openCV and simplecv but it looks like their are more targeted for more complex images.images. So I have not got them to work.

Is there a possibility to match blob contours or so? Your help and hints on how to solve this will be greatly appreciated!

I've also had a look at Hu Moments - but i think this does not recover the rotation, right?