Rectangle ROI

Rectangular region selection over the live image, with 8 resize handles and live stats (min/max/mean/std/sum, position, size).

Usage

Enable the rectangle checkbox, press-drag-release to draw, then drag corner handles for diagonal resize, edge handles for single-axis resize, or the body to move. Reset centers the ROI back to ΒΌ of the image.

Adding new stats

Stats are formatted in update_stats() of src/pystream/plugins/roi.py. Extract the ROI pixels via roi.getArraySlice(image, image_item), compute whatever you need, and add a line to the displayed text.