Sra. Morillas, For airborne image sensors we use a metric called relative edge response (RER) which is derived from the edge spread response (ESF). Satellite image sensors also use this concept.
We use RER both to focus a sensor in flight and to evaluate its performance. I'm interested in finding out more about COQ and trying it out. Are you analyzing horizontal and vertical edges to focus a sensor, measure performance or both? Thanks. Jeff Stokes Solid State Physicist San Diego, CA USA -----Original Message----- From: M Dolores Morillas Perez <[email protected]> Sent: Thursday, June 26, 2025 3:11 AM To: [email protected] Subject: Problems with MTF Calculation Hello. I am a new user of image J I have problem with MTF calculation with plugin COQ. When I have analized an horizontal edge with plugin COQ, the values of MTF (Y AXIS) is NaN Could you help me? Kind Regards, Mª Dolores Morillas Medical Phisicist H.U.V.V Málaga -- ImageJ mailing list: http://imagej.nih.gov/ij/list.html -- ImageJ mailing list: http://imagej.nih.gov/ij/list.html
