Visual Communication - SFR's of Image Gathering and Restoration
SFR's of Image Gathering and Restoration
The spatial frequency response (SFR) of image-gathering devices (to incoherent radiance fields) decreases smoothly with increasing frequency, so that the performance of these devices is constrained inescapably by the compromise between blurring and aliasing as well as the sampling passband and photodetector noise. However, the product of the SFR of the informationally-optimized image-gathering device and the SFR of the corresponding Wiener filter, as given by the throughput SFR = approaches the ideal SFR of the classical communication channel, which is unity inside the sampling passband and zero outside, as the SNR becomes very high.
Web site curator: Glenn Woodell