How To Find Bit Depth Of An Image

Fleck depth is a term nosotros hear floating around a lot in the worlds of photography and video. And, with the latter of those 2 topics, many confuse chip depth with bitrate. Just what exactly is bit depth? In this video from ZY Productions, we wait at the topic of bit depth to notice out exactly what it ways, and how information technology affects your images.

I matter to notation when we typically talk about bit depth and "8-fleck images" is that nosotros're talking 8 bits in each of the three red, green and blueish colour channels. Then, 24-$.25 in full. But what is information technology? In practical terms, it's the number of shades of greyness between pure black and pure white within each of those color channels.

A bit is basically a binary on-off switch. And each bit in binary is analogous to a "cease" when we talk most light measure out. Each stop of light yous add to your scene doubles the amount of light, and and so with each bit you add to a number you get doubles the total number of potential values. ane-bit is two values, off or on, pure blackness & white. ii-scrap is iv values; Blackness, white and a couple of shades of grey. 3-bit is 8 values, 4-bit is 16, and then on. By the fourth dimension we attain 8-scrap, nosotros're upward to 256 values.

But that'southward 256 values per color channel. With three colour channels, that's 256 (ruby-red) x 256 (green) x 256 (blueish) for a total of around xvi.7 one thousand thousand individual colours. When we add together ii more bits, it doesn't sound similar a lot, but each extra but doubles the value. 9-fleck is 512, 10-bit is 1024. That's 1,073,741,824 potential colours.

When nosotros start getting into things like 12-flake and 14-fleck raw, that'southward 4,096 and 16,384 values per colour channel respectively. For the 16-bit raw capability of many medium format cameras, that's 65,536 total potential values from pure black to pure white for each colour channel.

8 bits per color channel: sixteen,777,216 total colours
ten $.25 per colour channel: 1,073,741,824 total colours
12 bits per colour channel: 73,876,521,536 total colours
14 $.25 per color channel: 4,398,046,511,104 total colours
16 bits per colour aqueduct: 281,474,976,710,656 total colours

Then, essentially, more bits means more than colours, a lot more subtle tone between different colours and shades with much less banding. It also often means the potential for more dynamic range. This is why medium format guys rave nigh the subtlety of tones they can run across in their 16-fleck raw images.

Ultimately, even though you might be delivering 8-fleck video or photos in the stop, higher bit depth raws and footage volition offering you a much better starting point to create a terminal result that better matches your vision.

Source: https://www.diyphotography.net/256-shades-of-grey-8-vs-10-bit-bit-depth-explained/

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