I’m working on leaf shape variation and am using imageJ to measure leaf area, perimeter, circularity etc. I’ve been uploading scanned images and batch-measuring the parameters. However, I would like to use a scanned image of a known object e.g. a post-it, with known dimensions as a calibration for the image size but am unsure of how to do this. Could anyone point me in the right direction?
Thank you so much!