patch near edge causes problems

[lionfish0]

If a bright spot is near the edge of the image, it means the whole image of spots will be lost..

The error is usually something like:

part of patch outside image. Patch coordinate: (x=1800,y=15), Image shape: (shape[0]=307,shape[1]=409), blocksize=5, patchSize=16
Skipping patch

we need to handle when tags are near the edge in a better way- - the main problem is that the bright spot isn't deleted so other tags are also not found.