Image ROI

[jordidomingo]

Hello everyone,

I have some pictures, and I´m trying to extract manually the ROI (IM1, the ROIs are the tiles in the middle)
with the “interactive annotator” node. The problem comes when I use segment cropper node to separate the parts because it changes the colour. Do I have a way to get the ROI but with the exact same colour?
Thanks!

[bwilhelm]

Hi jordidomingo,

The problem is that you only set an labeling for the first channel of the image and the segment cropper will crop away the other channels. A quick easy hack is to crop the labeling to only include the channel where you specified the ROI and feed this 2D labeling into the segment cropper.
I created a small workflow which does it:

Image_ROI_color.knwf (86.9 KB)

I hope this helps,
Benny

[jordidomingo]

Thanks!! Your workflow helped me a lot!