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Detect contours, modify ROI

To extract / detect contours - adjust level and window using level/window slides, spin boxes or histogram widget. Optionally, to calculate histogram click and 'Histogram icon' at 'List of images' widget.
https://sites.google.com/site/alizaviewer/manual/editrois/level.jpg

Open 'List of ROIs' widget - click at 'circle' icon in lower right corner.


Select ROI or create new one. To create new ROI right-click inside widget to open menu.

To draw click 'Plus on circle' icon at 2D view toolbar.

Another panel will appear.