vertex color 2 image

Support Basics & Interface
1

is it possible to export vertex color map to image?

2

Yes there is http://lodweb.free.fr/downloads/python/UVpaint05.py

by JeanMichel SOLER (http://jmsoler.free.fr/)
Official http://jmsoler.free.fr/util/blenderfile/py/uvpaint04.zip