Lightnings taking a ride

by ceinmart

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an additive color model using the primary colors red, green and blue to reproduce a wide range of colors.

learn more… | top users | synonyms

0
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1answer
27 views

When to use LUV and not RGB colourspaces

Some applications extract information from images in the LUV colour space and not directly from the more commonly used RGB. Why is that?
5
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3answers
1k views

Can I do “back conversion” of a B&W JPEG to color?

I have a black and white JPEG. It is in fact an RGB image, which means that the color is still there. And I know from past experience that when I shoot B&W with my Canon, the color image is still ...
4
votes
1answer
46 views

How to minimise the noise in colour values when moving between colour spaces?

Let's say I was to change from RGB to HSV using a software like Matlab and then convert the result back to RGB using the same software. I know that there are going to be some slight noise and error in ...
2
votes
2answers
238 views

How do I set the RGB values of my monitor to match 6000K for calibration?

I've read that the Kelvin temperature for my screens should be around 6000K but I only have RGB values for adjusting the colors. Does anyone know what would be the best R, G, B values that match ...
3
votes
3answers
159 views

What are the RGB primaries in a camera?

More generally, what is the nature of the gamut? Primaries as peak sensitivity don't behave the same as primaries for mixing output. I suppose this is necessary to know for RAW importing and would be ...
1
vote
2answers
192 views

What combination of R, G, B lasers will give “White” with a given °K temperature?

Would it be possible to get a "white" lighting of a subject by using 3 different lasers (R, G and B) If so, which wavelengths and proportions should be used ?
2
votes
1answer
381 views

RGB to CMYK in Photoshop without ICC?

Is it possible to convert an RGB image to CMYK without an ICC profile?
12
votes
2answers
1k views

How do I interpret individual colors on RGB histogram?

I know how to read the Luminosity histogram and I thought that I knew how to read RGB histogram as well, until I saw the following example: The RGB histogram shows exactly the same 3 'spikes'. What ...
7
votes
4answers
2k views

Is there a lossless sRGB to CMYK conversion?

In my quest to print large images, I discovered that most such places, as opposed to photo labs, only accept CMYK images. While I consider myself an image processing expert, I realize there is a ...
14
votes
3answers
2k views

Are RGB numeric values equal to CMYK percentages?

are RGB numeric values equal to CMYK percentages?