Questions tagged [gamma]

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3answers
118 views

8bit monitor theoretical contrast

Imagine perfect monitor that can display pure blacks and is perfectly calibrated. What would the contrast be between its second darkest shade of black, that is 1,1,1 values for blue green red sub ...
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2answers
117 views

What does the Gamma histogram represents?

I do not understand what does the Gamma Adjustment histogram represents, as it differs a lot from the regular brightness histogram. Would very much appreciate an explanation :) Here taken from Canon'...
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2answers
153 views

How to correctly apply gamma to linear raw files from a machine vision camera?

I am using a machine vision camera that, according to the manufacturer, produces linear pixels. As a result, I need to apply a gamma correction to the image before I can view the result. However, ...
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4answers
237 views

How do I find out whether TIF images have gamma correction or not?

I have several DNG image files, recorded with an LGE Nexus 5X using Open Camera for Android as camera app. For further image processing i converted the DNG files to TIF files using Camera Raw 8 and ...
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3answers
142 views

Is there any camera in which I can adjust the gamma curve manually?

I am eagerly looking for a camera in which I can adjust the gamma correction. The cameras that I have, do this correction by default (which are not adjustable) and I need to remove this correction. ...
2
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3answers
216 views

Why does editing software not care about colorspace?

TLDR: Editing software does never indicate clearly how effects operate in terms of color spaces, gamma ramps and whitepoints. Why? Since I learned a lot about colorspaces, whitepoints, gamma ramps, ...
4
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3answers
3k views

How to do precise gamma corrections in Lightroom?

Recently I'm working with various images that need precise gamma correction, eg: scanned pictures that require a gamma shift from 1 to 2.2, it's a common problem around people who works with linear ...
2
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1answer
485 views

Does an image have an explicit gamma level?

Does an image in a, say, TIFF file have an explicit gamma or is it a latent characteristic of the image data ? or to put it another way: can I tell what gamma correction has been applied to an image ...
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1answer
574 views

Why gamma curve is applied in cameras?

I am tuning ISP(image signal processing) of one chip used in cameras. Gamma curve is used in the pipeline. I don't understand the reason. The CCM(Color correction matrix) will map images to sRGB color ...
1
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1answer
825 views

Is BT1886 only for video editing

Regarding the gamma specification called BT.1886, this could be taken into consideration only in video editing or can be used in still image editing as well, are there some limitations? I've found an ...
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3answers
3k views

When should I use my display's native gamma over the standard 2.2?

When it comes to color management and calibration, reading in official/unofficial sources, there are different oppinions telling that the native display gamma value can be left "as is" = "native" (2....
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9answers
7k views

What is the purpose of gamma correction in today's screens and how does it relate to graphics and photography?

I am getting quite confused with the purpose of gamma correction and the relationship between gamma corrected and uncorrected images in terms of graphics and photography as well as color management in ...
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5answers
2k views

What is the standard gamma value?

Following the instruction given in this question, I calibrated my monitor meticulously so that it adopts the standard gamma correction across all platforms, e.g. Internet, Photography, etc. Now what ...
5
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1answer
445 views

Can Canon Log Gamma be useful for photography?

The newest Canon cameras have a feature called Canon Log Gamma. I specifically became interested in its usefulness for still photography when I read that it captures: 12 stops of dynamic range, ...
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4answers
2k views

Query about gamma correction?

I have a bespoke Image Capture & processing flow, wherein I do the following operations:- Capture Raw data-->De-Bayer(Get RGB)-->Color Balance-->RGB-to-YCbCr-->Image sharpening-->Denoise ...
6
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3answers
906 views

Is this article correct about gamma error in picture scaling in common software?

That is kind of a "please proof-read an articles conclusion"-question. Some time ago I found this page: Gamma error in picture scaling. I grasp the point, that the luminosity-curve is not linear and ...