Grumpy_Mike:
No idea but I would be surprised if there was:-
- It is so hard to identify colour from an image
- The colours on real resistors do vary wildly
- It is so stupidly easy to do yourself.
True, though i do find those online converters slow to deal with at times, especially if i have a lot of mixed resistors to sort thru. I bet we will see one as camera color sensors or near-object focus get better in the future.