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Questions tagged [bit-depth]

The number of bits used to define the color of a single pixel or the number of bits used to define one color channel of a single pixel or the number of bits used to define the monochromatic luminance value of a single photosite in a raw file.

1
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4answers
781 views

RAW to TIFF or PSD 16bit loses color depth

I was under the impression 16 bits would keep the same depth. But for my great shock I have noticed that there is a considerable lost of depth. Testing with a Canon Mark II raw and using both ...
3
votes
1answer
832 views

Can I use 10bit effectively today and if yes how?

I found plenty of information, just nothing that would help me to make a final conclusion. Am I right in saying that 10bit are "just" a measure against color banding? More color range, better ...
5
votes
2answers
271 views

Reconciling gain (e/ADU), full well capacity and ADC bit depth

I have a CCD sensor datasheet which cites the following parameters in accordance with the EMVA 1288 standard: ADC bits 14 bits Well depth 17273 e- Gain (e-/ADU) 0.17 I'm unable to reconcile ...
4
votes
5answers
2k views

What is difference between 8bit RGB and 16bit RGB?

Most of time when I open any images to Photoshop, it shows 8bit RGB format, but I have also seen 16bit RGB. As a trial, I copied one image and pasted it into a 16bit RGB blank image, but I didn't get ...
1
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1answer
60 views

Why does Preview mess up an image while saving it to OpenEXR?

I started with a JPEG: ... and saved it to OpenEXR (8 bits per channel) using Preview on macOS Sierra, which created an image with a washed out look. For your convenience, I've re-exported the EXR to ...
4
votes
1answer
110 views

Photoshop Image mode and bit depth

When I edit my pictures I always work in 16 bit mode because I know I have more color space where I can move so I can avoid issues like banding. At the same time I realised that there's an advanced ...
13
votes
3answers
3k views

RAW files store 3 colors per pixel, or only one?

Ken Rockwell says that camera makers consider the individual R/G/B sensors when they talk about megapixels. So the image below would be a 6x6 pixel camera, not 3x3 as you would imagine. If that's ...
1
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1answer
124 views

Problems with HDR regarding bit depth and file type

When I merge my brackets with Lightroom it's always 8-bit and in HDR Efx Pro 2 it's also in 8- or 16-bit. When I use PS to merge brackets I can convert it to 32-bit but then I can't post-process it ...
1
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4answers
652 views

Why does an X megapixel sensor produce X MB of data (in image files)?

Suppose I have 1 mega pixel sensor, it means I have 1*10^6 (1 mega) pixels. If and only if each pixel represent the density of his color in 8 bit depth, so 8 bit = 1 byte, means each pixel is 1 byte ...
0
votes
1answer
471 views

Why isn't Matlab/Octave reading in the entire 14 bits of my .NEF raw files?

I am using a Nikon D5200. I intend to do some image processing on the raw images shot with the camera. But I am encountering a problem when I read the raw images using GNU Octave. Rather than giving ...
10
votes
1answer
655 views

What does a fractional colour bit depth mean?

Looking at camera comparison sites today, I encountered statements like "color depth: 23.5 bits". (See here for example, which gives the 5D Mk III a 24-bit colour depth, and the D7000 a 23.5 bit ...
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2answers
549 views

dcraw command for 14 bit raw image

I'm using "-4 -D -T" to transform a 14 bit raw image (.nef) to a linear unprocessed tiff image. Is it the correct command? Does the command differ for 12 bit or 16 bit image?
34
votes
5answers
8k views

What's the point of capturing 14 bit images and editing on 8 bit monitors?

I am bit confused. If my DSLR is capturing 14 bit image while shooting RAW. Don't I need a 14 bit monitor also to take full advantage of capturing in RAW? Whats the point of capturing an image in 14 ...
5
votes
1answer
731 views

I accidentally shot in 12 bit instead of 14 bit, and my pictures are green and underexposed. How can I compensate/convert?

I accidentally shot in 12 bit color instead of 14 bit, and now, no matter what Linux program I use, the .NEFs are green and underexposed. As I said, I'm using Linux, and my camera is a Nikon D5300. ...
3
votes
3answers
3k views

What is the difference between 16-bit and 32-bit high dynamic range images?

This stems from different HDR workflows that I know. In Photoshop for example, you can merge multiple images to a single HDR file. As far as I remember, when you go for a 16-bit file you also pick ...
1
vote
4answers
255 views

Is there a technical reason to go from RAW to an 8 bit TIFF?

I was watching a video about frequency separation techniques for skin retouching in Photoshop. The subject is irrelevant, but I mention it because this comes from a decent source and a high-end ...
13
votes
5answers
10k views

What's the difference between colour space and bit depth?

I know that there are different types of colour space and that sRGB is the most common. Bit depth defines the variations of a colour channel, where (I think) 8 and/or 16 bits are the most common. ...
1
vote
1answer
82 views

What happens to image after opening from ACR to PS?

My RAW images have 12 or 14 bits depth (depending on camera settings). After I open them in Adobe Camera Raw, adjust exposure and other things, and then send to Photoshop, is the image reduced to 8-...
10
votes
2answers
2k views

Viewers that output to 30-bit monitors?

I'm having trouble finding applications that output to 30-bit monitors. Part of the problem is inconsistent terminology, as some say 30-bit color, or 10-bit color (as in 10-bits per component) or deep ...
0
votes
1answer
262 views

Can I use ProPhoto in 14 bits?

I've always shot in RAW 12 bits (max on my old camera). With my D7000 I can capture RAW files in 14 bits. Is this enough to go with the ProPhoto RGB gamut, or is 14 bits too little to represent all ...
-3
votes
3answers
144 views

Displaying an 8bpp image on 30bpp hardware, what to do with the extra bits? [closed]

I am building some hardware with a graphical user interface and my images are stored with 8 bits per pixel (bpp) in RRRGGGBB format. However, my video chip expects 30bpp pixels (10 bits for each color)...
4
votes
5answers
2k views

Is it possible to increase digital color depth via interpolation?

I have a set of photos that where scanned at 8 bit color depth. Is it possible to increase the color depth digitally? I realize just increasing the color depth would gain me nothing unless it also ...
2
votes
2answers
3k views

Is it possible to make a 1-bit (bitonal) JPEG?

I think the answer is no, so I guess what I'm really looking for is an explanation. It seems as though with every library and tool I've tried for converting images, even when all of the pixels are ...
1
vote
2answers
414 views

Is conversion to 16 bit needed for good PP results when working on JPEG images?

When working on JPEG files, should I start by converting the images to 16 bit depth? Supposedly that would make for more room for the adjustments I'm going to make on the photos. Two occasions that ...
3
votes
1answer
149 views

Why does Rawstudio display individual RAW color levels as 8-bit values?

I use rawstudio to deal with raw images that I shoot on my Canon 600D(T3i). I don't understand why the raw image's RGB color only displays values in a 8bit base (0-255) when I put the mouse over the ...
1
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1answer
2k views

What's the brightness depth of IPhone 5 camera in bits?

Likely this will be the same as the color depth in bits per channel. For digital cameras it can be 8bit or 12bit and sometimes as high as 14bit. What is it for the IPhone 5?
1
vote
1answer
558 views

How to scan at greater than 8-bit color with Image Capture?

I have an HP Deskjet 3054. I'm scanning using Apple's Image Capture app, and am trying to set the bit-depth to something higher than the default as all of my images come into Photoshop as 8-bit. I'd ...
0
votes
4answers
12k views

Why are my 14-bit RAW files being saved as 8-bit on my computer?

I shoot a Canon 5D Mark ii at the highest quality setting. RAW files on this camera are supposed to be 14 bit, but when I save them on my computer, they are all being converted somehow to 8 bit. I use ...
2
votes
2answers
2k views

Does the Nikon D4 capture 16-bit images?

I keep seeing mentions of the D4's 16-bit imaging pipeline but I'm having a hard time finding any information or specifications on what exactly that means. Does that mean the sensor captures images ...
13
votes
3answers
7k views

Is 14-bit RAW better than 12-bit RAW?

A regular JPEG image has only 8 bits to store information about the tone of each pixel. When storing the image in RAW format (for example, DNG), we can store tone using more bits per pixel, which ...
11
votes
4answers
5k views

How many bits of data are typically actually captured by a digital camera sensor?

In a comment on this question someone suggested that camera sensors typically only output 12-14 bits of data. I was surprised because that would mean that 24 bits of color is only useful for doing ...
18
votes
5answers
45k views

How many colors and shades can the human eye distinguish in a single scene?

How many distinct colors, shades, hues, and tints can the average person distinguish in a single scene? In other words, what's the theoretical bit-depth required to be sure of recording a photograph ...
6
votes
1answer
7k views

How do you set the Canon 5D RAW pictures to 16 bits mode instead 8 bits mode?

I am shooting in RAW 8 bits mode, but I can't find out where to set the camera to shoot RAWs in 16 bits modes. Any thoughts?
23
votes
4answers
3k views

How can dynamic-range be larger than sensor bit-depth?

Found something that confused me and so I thought the crowd here can probably answer this one since its camera-related and technical at the same time. How can dynamic-range be larger than sensor bit-...