To jest opis 1Dii z roku 2005 - algorytmy redukcji szumu już na matrycy, zanim jeszcze cokolwiek tę matrycę odczyta:

"Canon's advanced CMOS sensor technology uniquely allows significant image-processing functions to be integrated right onto the sensor chip, before the image data even reaches the digitizing electronics. In the 1D Mark II's sensor, Canon has implemented no fewer than three different anti-noise processing techniques directly on-chip. While remaining very close-mouthed about the specifics of these anti-noise techniques, Canon does note that they affect both fixed-pattern and random noise generated within the sensor elements."

Sony:
"Area-specific noise reduction is now more powerful than ever. It selectively divides the image into areas based on patterns (such as edges, textures and evenly colored areas like blue skies), then applies the most appropriate noise reduction for each area to markedly reduce noise and improve image quality — especially at high-sensitivity settings. Working together with detail reproduction technology, it delivers supremely clear images with exceptionally fine detail."

Oczywiście, takie samo albo I lepsze "area-specific" odszumianie można zrobić sobie samemu używając specjalnych algorytmów.


Tu jeszcze dyskusja o sławetnym DXOMark Sensor. DXO chyba ostatnio jednak trochę przegieło ze zbyt już grubymi nićmi szytym wsparciem Sony. Głównie chodzi o bezsensowne porównanie 7D2 z 5-letnim Nikonem i jest reakcja na to:

Are Nikon DSLR sensors actually better than Canon's? - Photography Stack Exchange