Only retrieve the first two edges to make flatmask
Only retrieve the first two edges to make flatmask

CVML/pycortex,smerdis/pycortex,gallantlab/pycortex,CVML/pycortex,CVML/pycortex,gallantlab/pycortex,smerdis/pycortex,gallantlab/pycortex,gallantlab/pycortex,smerdis/pycortex,smerdis/pycortex,CVML/pycortex,smerdis/pycortex,CVML/pycortex,gallantlab/pycortex