Shadowy Daisy

Shadowy Daisy
by damned-truths

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The main reason is data management. A stills camera can freeze an image in the sensor using a shutter, then take it's sweet time reading it out, compressing it if desired and writing it to a storage device. A video camera has to capture and readout the image within one frame time, the encoding and storage can be pipelined to some degree but they still ...


Reading 33Mp at 25 fps with 3 8bit channels per pixel is nearly 20Gib/s (order of magnitude estimate based depending on how the Bayer mark is dealt with etc.). On-chip compression trades this against the need for real-time processing on the sensor. This is clearly possible but expensive, power hungry and bulky compared to still image readout rates (at least ...


We examine a photograph for detail and pictorial information. We look at video and movies for different kinds of information having to do with flow and sequence. If we had the technology, we'd use it. Everything we have now is a concession to limited materials and processes. There are many phenomena that await such technology to reveal their secrets to ...


Do you have a display(TV) that could utilize 100mp? Also, capturing 30fps of 100mp images... Not going to happen in today's world without a serious cost. Why do stills need this? For printing large formats and for post production cropping abilities.


My understanding is that by setting up a system that reports clipping limits or over/underexposure at 13 and 235 instead of the actual hard limits of 0 and 255 sort of gives a little "cushion" for exposure adjustment later. I think you're right that it wouldn't be necessary if working in raw or even at higher bitrates but at 8-bits you don't have much wiggle ...


The IRE (Institute of Radio Engineers) has determined the luminance range and gamma for Video to render properly. This is called the 10 point IRE scale and has pre-set values for shadows (16) to highlights (235). Different points represent different luminance levels on the IRE scale. Below 16 is a "crushed black" or 0. No detail shows below this level. The ...

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