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by Aganju

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A colour space is a specific organization of colours. In combination with physical device profiling, it allows for reproducible representations of colour, in both analogue and digital representations. The colour spaces most commonly encountered in photography are Adobe RGB and sRGB.

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55 views

How does Lightroom group colors inside the HSL panel?

I am working on a small application that would allow the same functionality as the Lightroom HSL Panel: I would like my application to behave very similarly to how Lightroom does. Therefore I grouped ...
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1answer
40 views

SilverFast CIELab: What illuminant and observer is assumed?

I am scanning prints with the scanner software SilverFast, which offers the option to scan to a file containing CIELab values. However I need to know what CIE illuminant and observer is assumed when ...
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1answer
87 views

How to process images to emulate mismatched color profiles?

I have been trying to emulate a saturation effect that occurs when I do the following in Photoshop: Select the Export As dialog and choosing JPEG without integrating an ICC profile Select the Open ...
10
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2answers
256 views

Which color space is used by my iPhone 8 photos?

While my old iPad mini photos say their color space is sRGB, my new iPhone 8 photos tell me their color space is "65535" ("unknown value"). Some sources say this value means "uncalibrated", but that ...
3
votes
1answer
64 views

Are these versions of sRGB v2 the same?

I have seen references to two versions of sRGB v2 IEC 6 1966-2-1, for example here ICC.1: 2001-04, for example here Are these the same, or different? They come from 2 different organizations (IEC=...
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2answers
198 views

After soft-proofing in Lightroom, which color space should I embed with the exported JPG?

Let's say I've loaded my print shop's ICC profile for the printer/paper/ink combination I'll be using into Lightroom, I've soft-proofed the image in the Developer module with said ICC profile, and I'm ...
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1answer
29 views

Are the sliders in Adobe Camera Raw input color space independent?

Are the sliders (shadows/highlights) in Adobe Camera Raw affecting the device-dependent data before transformation to device-independent color space, or does this transformation happen after the input ...
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1answer
139 views

How to create abstract color profile to encode specific color transformation?

I have a set of images (48-bit TIFF) that are encoded in ProPhoto RGB. I have a set of alternative input color profiles (related to ProPhoto RGB, but slightly different) that I can assign to the ...
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3answers
2k views

Colors are different in Adobe Camera Raw compared to Photoshop (sRGB)

Here is a .NEF raw file taken with a Nikon D7000, opened in Camera Raw. Note that sRGB IEC61966-2.1 is chosen as the colour profile. I have not modified any image settings. The reds appear washed out....
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1answer
489 views

Photoshop color profile mismatch when open raw

When i open my raw files in adobe photoshop, a message box opens asks: the document has an embedded color profile that does not match the current RGB working space. Embedded: Adobe RGB (1998) ...
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votes
3answers
77 views

What are the benefits of profiling a factory-calibrated AdobeRGB monitor?

Suppose I have a high-end monitor that supports AdobeRGB natively and is calibrated at the factory. Assume that I just got the monitor and that factory calibration is spot on. Do I still need ...
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2answers
1k views

What does “calibrating a screen to sRGB” mean?

I occasionally read on Internet the mention of "calibrate your display to sRGB" or "a display calibrated to sRGB". Now, I am no expert in color management, but I have this thick book which I am ...
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2answers
478 views

lightroom photo export with sRGB profile

I work on a calibrated Full gamut monitor, and switch between lightroom and Photoshop for my editing. Both are set to work in AdobeRGB color mode. After all edits are done, i go to export, and set the ...
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2answers
1k views

How does the in-camera color space setting affect RAW files? [duplicate]

When I switch my Nikon D750 from sRGB to the Adobe RGB color space in the Photo Shooting menu, how does it affect the content of my NEF files? I understand what would happen to JPEGs, but the camera ...
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1answer
53 views

How can I specify the Blue ,Green ,Yellow and Red colours both in LUV and in RGB space? [closed]

I have to define the L,u and v values of these colours.
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1answer
2k views

Color profile inside JPEG file

1) What is the best practice for color profiles embedded in .JPG images, for web? (non print) sRGB profile stored in .JPG file ? AdobeRGB profile stored in .JPG file ? no profile setting in .JPG file ...
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1answer
195 views

Humanae pantone colors to RGB conversion

How to find the RGB color codes for the humanae project-humanae link. It uses pantone colors, but the codes given in the website at humanae couldnt be found on pantone color finder at pantone-color ...
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1answer
1k views

How to do batch conversion from Adobe RGB to Srgb

I have a lot of pictures (almost a full 4gb memory card) that I accidentally shot in Adobe RGB on my Sony SLT a35. Will Adobe RGB images look different or unrealistic if seen/displayed on a monitor (...
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2answers
173 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, ...
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2answers
363 views

Inconsistent image viewing experience

I post-processed a RAW photo in Photoshop in 16bit in the ProPhoto color space and lastly exported it to an 8bit sRGB JPEG image. Now the funny thing is that I experience different results depending ...
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2answers
7k views

P3 Color Pallet vs sRGB

I have RAW images and export them from Lightroom using the default sRGB colorspace and haven't ever had a need to change this for display on websites. However, I develop websites and apps that run on ...
3
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1answer
238 views

Change JPEG ColorSpace Encoding value

I exported a photo to JPEG without realizing it had embedded Color Profile "ProPhoto RGB". When I opened it in a viewer that, presumably, assumes the sRGB ColorSpace, I really liked the effect. How ...
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3answers
8k views

I used a Spyder 5 Pro from Datacolor to fix my monitor color, and now it's even worse?

I'm using an Alienware 17 R3 with a 4K screen, and my monitor colors were looking off, so I bought a color probe to get my monitor screen as close as I could to print. Made sure all screen and ...
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3answers
335 views

Does saving a file in Prophoto RGB increase filesize?

Does saving a file in ProPhoto colorspace increase filesize? I'd think that given that it contains more informations it would use up more diskspace, (if so, how much more?) on the other hand, the ...
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3answers
549 views

Why don't we see charts of the colorspace/gamut of a DSLR?

For many displays, we see the color space or gamut shown on chromaticity charts in comparison with some standard color spaces like Rec. 709, sRGB, Adobe RGB, and Prophoto RGB which gives an indication ...
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1answer
142 views

How are images saved in different color spaces?

I am learning about color spaces, but I am wondering about how computers save color values of each pixel. I know that if an image is in the RGB color space, the computer will save the Red, Green, ...
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2answers
133 views

On iOS, why would one want to pick a 'video' pixel format (16-235) over a 'full' format (0-255)?

Take a look at this screencap from this year's WWDC session 501 "Advances in iOS photography". As an app developer, you can tell the camera subsystem to either use the 'video' pixel format or the '...
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7answers
2k views

What is the actual color space of film in film photography?

I have been thinking about this question for a while now, and I haven't found an answer online. Modern technology (scanners, screens, digital cameras, printers...) use technical color spaces to ...
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1answer
640 views

Tagged or untagged sRGB images for web?

I have a situation and I am interested to find your point of view. We have a calibrated monitor at D6500, tone curve as measured ~2.4, white level ~90cd/m2 and a tagged sRGB / untagged sRGB image ...
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2answers
356 views

Why does the result of Photoshop Curves and Imagemagick Curves differ?

When using imagemagick to apply curves (convert -function), the output differs from the output when I'm using a curves adjustment layer in Photoshop. What is the reason for this difference? I'm using ...
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6answers
3k views

Is there free software to compare gamuts?

This questions is related to Why did LR6 soft proofing thought some colors were out of gamut even if they turned out perfect? Since I found out some of my images are out of gamut of the printing ink+...
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3answers
791 views

Why are the color spaces we have access to incomplete?

The question, then: If all colors are combinations of red, green and blue, and my monitor's pixels use all three, why is its color space limited to so small a portion of the actual complete color ...
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1answer
99 views

Soft proofing without physical printer in LR6

I've decided to print out one of my photos with a plotter. So to make sure I will get the right colors I've asked in the print shop what printer and paper are they using so that I can soft proof in ...
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1answer
216 views

Are colour profiles ever stored in RAW files?

Recently on a wildlife photography course, the leader asserted that using aRGB in the camera settings meant less loss of data in the RAW file than if sRGB were used. As I did not understand this I ...
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1answer
815 views

In Lightroom how do you specify Perceptual or Relative when exporting image?

In Lightroom 6 I can use Soft Proofing to see what my image will look like with different profiles, and I can choose whether to do the conversion using Perceptual or Relative. However when I actually ...
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2answers
105 views

Is conversion from one colour profile to another clearly defined

Is conversion from one colour profile to the other other clearly defined ? If I change the ICC profile for an image from sRGB to another profile such as Adobe RGB will it be applied the same way by ...
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1answer
64 views

Does Soft Proofing to a different profile modify the actual photo

Am I right in thinking the difference between using Soft Proofing to a different colour profile (in Photoshop for example) and just changing the colour profile is that with Soft Proofing use of the ...
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2answers
315 views

What's the perfectionist's workflow for taking a photograph from capture to print?

I'm interested in perfecting the 100% ideal method of doing things, keeping the color tones and quality through capturing to the printing and publishing. This isn't about handling the camera or doing ...
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8answers
4k views

Why don't color spaces use up the entire color spectrum?

Take a look at the CIE 1931 chromaticity diagram shown with the sRGB color space gamut. Why are certain colors intentionally left out of color spaces, like you see below? Why not just include all the ...
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2answers
215 views

What colour space does Adobe Lightroom use when displaying photographs outside of the Develop module?

I've already read What colour space does Adobe Lightroom use in the Develop Module? this question but its leave two points unanswered: Does Lightroom use that particular color space throughout or ...
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3answers
683 views

Why don't cameras capture using the CIE XYZ color model?

If the CIE XYZ color model is a better representation of what humans see, then why don't CCD arrays in cameras capture data in a way that maps to it rather than the RGB model? It seems especially ...
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2answers
503 views

What should I do with negative values when computing sRGB colors from spectra?

This question is from the computational side of things. Maybe some of you computational photography folks can help me out. If I have a normalized CIE XYZ tristimulus vector like this one: (x, y, z) ...
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1answer
1k 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?
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5answers
11k views

Why do my Photoshop/LR pictures look different on Facebook?

The left picture is the uploaded picture to Facebook, center picture is exported jpeg from photoshop and opened using Windows Photo Viewer, and right picture is open in Photoshop still. The center and ...
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1answer
123 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 ...
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3answers
1k views

What is the difference between HSV and CIE-Lab color space?

When do we (or should we) use HSV color space and when do we use CIE-Lab color space?
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1answer
343 views

Is it true that all current browsers and OSes are “color managed” now?

My understanding is that around 2010 everything except IE (which still had issues) was Color Managed and displayed web images containing embedded profiles correctly. Today (2015) all current ...
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3answers
812 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 ...
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2answers
240 views

Photoshop working color space choices

I've always read that normal users should stick with AdobeRGB and not use ProPhoto for the working color space. But why? Does it affect the ability to edit and make sense of color changes? I ask ...
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2answers
200 views

Color profile from calibration affects Windows' Preview

I recently bought an X-Rite i1 Display Pro that I used to calibrate my notebook. I had some problems with the calibration, but it turned out that my settings were not perfect and in the end I managed ...