How to correct annotations (add and/or subtract pixels)

[ainnotate]

Hi,

Thanks for the wonderful project. I'm able to use the test scripts and try out the segmentations.

In the below refinement.gif, I see that the segmentations are corrected after the 1st attempt. For instance, the leg of the dog below was was initially included in the segmenentaion of the cat. Later, the leg was excluded as pointed out below (using red arrow)

Any idea of how to achieve this?

The tool used for annotation is available as part of any opensource project?

Thank you.