Function specification mistake and corner detection problems

[Ben Plotnick]

In the feat_desc function specification, it says that im is a double array with values of 0-255.  Is this supposed to be a uint8 array with values 0-255 or a double array with values 0-1?

On a separate note, I am having serious trouble getting the built in corner detector to get good readings on my images.  The test images work perfectly but my images fail severely.  Is there any trick to this?  Is my phone's camera too bad for this to work?

Thanks

-Ben

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Ben Plotnick
University of Pennsylvania
M.S.E Electrical Engineering | May 2012
bplo...@seas.upenn.edu

[Andrew Yeager]

uint8 from 0 to 255.

It should work with your cell phone camera.  Is the image much larger than test images?  Maybe increasing the sigma argument for the smoothing kernel or downsizing the image would help.

Andrew

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[Ben Plotnick]

Simply subsampling the image worked perfectly!  That and adjusting my corner threshold slightly.

-Ben