Are you sending a robotic rover to Mars? Do you require software to characterize and calibrate the cameras on your rover? Then you should consider using MTF Mapper, just like the Mars 2020 Perseverance Mastcam-Z team did! [1]
ps: Of course, MTF Mapper also works on earthbound cameras of all shapes and sizes.
References
1. Hayes, A.G., Corlies, P., Tate, C. et al. Pre-Flight Calibration of the Mars 2020 Rover Mastcam Zoom (Mastcam-Z) Multispectral, Stereoscopic Imager. Space Sci Rev, 217, 29 (2021).
Hello,
ReplyDeleteI didnt get yet how to use the GSD in order to define the NYQUIST frequency, for example, Lets take an optical image with GSD of 1 m, and the cycle is 30 pixels, what will be the NYQUIST frequency in cycle/pixel units ?
Thank you.
Hi,
ReplyDeleteThe Nyquist frequency of the image sensor is always at 0.5 cycles per pixel (disregarding things like colour filter arrays).
So if 1 cycle is 30 pixels = 30 m, then your sampling rate is 1/30 cycles per m.
The Nyquist frequency should be half of that, i.e., 0.5 * 1/30 = 1/60 cycles per m.
-Frans