4 ms·

> That means that you need to expose the chip, scan the image from it, do the A/D conversion, demosaic, gamma correct, color correct, denoise, vignette correct,

> That means that you need to expose the chip, scan the image from it, do the A/D conversion, demosaic, gamma correct, color correct, denoise, vignette correct, distortion manage, remove chromatic aberration (because cheap lenses), Can you explain what's the difference in gamma correction and color correction? New gamma correction uses perceptual mapping right (e.g. Dolby vision) - doesn't that already put you into a standard color space? > then, display it on the screen, continuously, within 50ms per frame That's 20 fps. Don't you need at least 24 to capture cinematic footage?

realityking 5y ago
> That's 20 fps. Don't you need at least 24 to capture cinematic footage? They‘re not talking about fps but latency. From light hitting the sensor to it being emitted again by the viewfinder With all the processing inbetween.
ChrisMarshallNY 5y ago
Gamma is basically a logarithmic light correction. It is a digital reflection of an original analog process. Color correction is a much more intricate and subtle thing. Digital cameras have color bias (for example, they tend to like red, a lot, while film liked greens and blues). Color correction makes sure that the colors that come out, can be accurately correlated to the ones that came in. You can also do some cool things, by remapping into different color spaces (a lot of image processing is done by changing the data to a new color space, and playing with the channels). We’re talking the viewfinder, so it is latency. It is also FPS. The viewfinder can be slightly relaxed, but pros will want the viewfinder to be highly representative of the final outcome. Latency is critical, because they use the viewfinder to make the decision when to snap the image, or set the scene. The final output can be slightly more relaxed, with post processing in a buffer. Video makes that a lot more intense. That’s why you have a limit to how many frames you can have in a burst. They get fed into a buffer, for post processing. Another big advance will be true electronic shutters. I’m not sure we’re there yet.
- alexashka 5y ago
  > Another big advance will be true electronic shutters We're pretty much there. The latest Nikon flagship (Z9) doesn't have a mechanical shutter.

realityking 5y ago

> That's 20 fps. Don't you need at least 24 to capture cinematic footage? They‘re not talking about fps but latency. From light hitting the sensor to it being emitted again by the viewfinder With all the processing inbetween.

ChrisMarshallNY 5y ago

Gamma is basically a logarithmic light correction. It is a digital reflection of an original analog process. Color correction is a much more intricate and subtle thing. Digital cameras have color bias (for example, they tend to like red, a lot, while film liked greens and blues). Color correction makes sure that the colors that come out, can be accurately correlated to the ones that came in. You can also do some cool things, by remapping into different color spaces (a lot of image processing is done by changing the data to a new color space, and playing with the channels). We’re talking the viewfinder, so it is latency. It is also FPS. The viewfinder can be slightly relaxed, but pros will want the viewfinder to be highly representative of the final outcome. Latency is critical, because they use the viewfinder to make the decision when to snap the image, or set the scene. The final output can be slightly more relaxed, with post processing in a buffer. Video makes that a lot more intense. That’s why you have a limit to how many frames you can have in a burst. They get fed into a buffer, for post processing. Another big advance will be true electronic shutters. I’m not sure we’re there yet.

alexashka 5y ago
> Another big advance will be true electronic shutters We're pretty much there. The latest Nikon flagship (Z9) doesn't have a mechanical shutter.