I'm sorry, I don't see how using a different word changes anything. Averaging together more noisy measurements vs. fewer less noisy measurements can indeed lead to the same result.
On Tue, Aug 5, 2014 at 5:42 PM, Godfrey DiGiorgi <[email protected]> wrote: > That's what happens when they use the wrong term. Sensors don't have pixels, > they have photosites. Replace the term 'pixels' with 'photosites' and what > they say makes good sense. > > Photosites aggregate through processing to become picture elements—pixels. > Lower sensor noise as in better SNR from the photosite array does indeed lead > to cleaner results in the pixel aggregate at the end of the processing chain. > > Godfrey > > >> On Aug 5, 2014, at 12:50 PM, Bryan Jacoby <[email protected]> wrote: >> >> "The larger pixel size means that each pixel >> can collect physically more light. The more light per pixel, the >> better the signal to noise ratio for that pixel and so that pixel will >> more accurately detect the incoming light than a smaller pixel would." >> >> I think this idea of bigger/fewer pixels leading directly, as in >> through the very basic physics of photon noise, to lower noise is >> wrong-headed. I couldn't care less what the signal-to-noise ratio of >> _pixels in my sensor_ is. What I care about is the SNR of pixels in >> the output image, whether that be an image displayed on a screen or >> the dots made by a printer. A camera with more pixels will have more >> of those pixels averaged together in each pixel of a given final >> output image, and it all comes out in the wash. >> >> This is not to say that all sensors are equal. Just that the amount >> of light collected by each pixel of the sensor isn't what matters. >> >> (Darren, I am ranting at petapixel, not you. > > -- > PDML Pentax-Discuss Mail List > [email protected] > http://pdml.net/mailman/listinfo/pdml_pdml.net > to UNSUBSCRIBE from the PDML, please visit the link directly above and follow > the directions. -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
