BITS PER CHANNEL

[Daniele Marconcini]

Can anybody explain how many BITS PER CHANNEL is RED ONE camera using for sampling from the sensor
and if the same BITS PER CHANNEL are used in REDCODE42 or if there is any difference?

Thank you, everybody
Marconcio

 

[Shiblon Wixom]

The Red One samples at 12bit, and Redcode 42 is = 8:1 compression

 

[Daniele Marconcini]

12bits PER CHANNEL, 12bits TOTALLY = 4bits x 3 channels or 12bits TOTALLY (no more given informations)?

 

[Pablo Moreno]

12bits PER CHANNEL, 12bits TOTALLY = 4bits x 3 channels or 12bits TOTALLY (no more given informations)?

There is a misconception about bit depth. I'll try to explain..

An 8 bit grayscale image produces, 256 shades of grey only.

An 8 bit PER CHANNEL image produces, 256 x 256 x 256 shades of red, green, and blue, When combined, it will produce a total of 16,777,216 million colors (Macintosh systems refer to 24-bit color or true color on Windows).

A 16 bit per channel image is able to produce, up to 32,768 shades of red, green, and blue, When combined, it will produce a total of 35,184,372,088,832 trillion colors (They call this: Deep color).

So Red One, been 12 bit per channel, is still in the range of billions of colors, but you do the math..



EDIT: According to the experts, the human eye cannot discriminate more than 10 bit depth color.

 

[Daniele Marconcini]

Thanks for clarifying this stuff, I'm comfy with the Bits Per Channel definition tho ,

shall I suppose the short answer is RED ONE samples at 12bits PER CHANNEL resulting a 36bits RGB sampling?

 

[Shiblon Wixom]

The Red One camera is shooting to a RAW format, each red or blue or green photosite is recorded as 12bit information, the debayer process creates the RGB channels and subsequent image from the RAW data, so the camera is not capturing Red Green and Blue and then combining the information in the same way as a 1 or 3 chip camera. RAW clips have Red, Green, and Blue information but it does not have channels until the image is debayered.

So the answer would be that the debayered image would have the bit depth of the RGB codec you transcode to, usually 8 or 10 bit, but up to 12 bit would be the maximum for the Red One.

 

[Pablo Moreno]

Thanks for clarifying this stuff, I'm comfy with the Bits Per Channel definition tho ,

shall I suppose the short answer is RED ONE samples at 12bits PER CHANNEL resulting a 36bits RGB sampling?

That is correct, but most modern video cards convert to 30-bit color RGB or they use a floating point number, but Natress Graeme is the guy who can explain this better, since he is the expert..

 

[Pablo Moreno]

RAW clips have Red, Green, and Blue information but it does not have channels until the image is debayered

Are you sure about that?

the answer would be that the debayered image would have the bit depth of the RGB codec you transcode to, usually 8 or 10 bit per channel, but up to 12 bit per channel would be the maximum for the Red One.

Well you could be right about this but, Raw images do contain depth information besides the color information, check Bayer pattern image below..

 

[Daniele Marconcini]

Thanks for the great answers, this was exactly what I was looking for, and thanks for explaining even further, I had infact the feeling that one thing is how many bits the sensor can assign while sampling and another thing is the bit depth per pixel the camera is capable to/or writes in a given footage format.

Long live qualified people

Marconcio

 

[Pablo Moreno]

Long live

 

[Hrvoje Simic]

A 16 bit per channel image is able to produce, up to 32,768 shades of red, green, and blue, When combined, it will produce a total of 35,184,372,088,832 trillion colors

16 bit = 65,536 shades per color = 281,5 Trillion colors.

 

[Pablo Moreno]

16 bit = 65,536 shades per color = 281,5 Trillion colors.

Not according to Photoshop CS6..

 

[Pablo Moreno]

16 bit = 65,536 shades per color = 281,5 Trillion colors.

According to this explanation, you are right, so, either there is something wrong with my computer, or the guys at Adobe crippled the whole thing in a half in order to save memory. Correct me if I am wrong, but, as far as I know, there is not display capable of showing all those colors yet anyway..