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Basically, life color information is like a box of chocolates crayons... Color information is stored in integers, not analog values — there are a discrete, countable number of colors that can be described at a certain bit depth. Think of the color space like a box of crayons of different colors. A color space describes the types of crayons that are ...


11

Bit depth and color space are not the same thing, and neither are they mutually exclusive. They are different things that exist simultaneously. For a particularly simple explanation: Bit depth determines the fineness with which each distinct color is graded. Color space determines the extent within which those colors are distributed. Let's take sRGB and ...


6

The chromatic gamut is the property of output device, not a recording device. The colorimetric input device is characterised with it's compliance to Maxwell-Ives criterion - i.e. how metamerically close it is to the CIE standard observer - the equivalent of photopic human vision. This compliance can be roughly characterised with one value, the example of it ...


6

Performing the operation directly using the chromaticity coordinates (ie: taking the midpoint between the two chromaticity coordinates) will yield incorrect results as the chromaticity diagram is highly non uniform. Assuming you are using linear light values you could perform the following chain of computations: CIE xy to CIE xyY (Optional) for each pair ...


5

Yes, the color gamut of a high end dye printer is generally superior to pigment and pigment ink is generally superior to chemical photo paper. In longevity pigment ink and good archival papers can actually out endure chemical photo paper now as well. In general, you actually see it the most with the depths of black, but when comparing anything pigment to ...


4

Short answer: You are probably confusing the sensor bit depth with the output file bit depth. There are two completely different and mostly unrelated bit depths: There is the bit per pixel of the sensor and the raw file (in your case 14 bits) this does not relate the the color space in any way because those values are before the demosaicing algorthem turns ...


4

The Epson 3880 uses a set of 9 cartridges. It's still a CMYK sort of system, but more like CCMMYKKKK. With four different varieties of black, it's understandable that you might be thinking that replacing "light light black" with "dark cyan" might give deeper blue evening skies, or adding "dark magenta" might allow for prettier roses. And yes, perhaps adding "...


3

Get the chromaticity coordinates of the ink and plot them on a CIE Chromaticity diagram.It's the colourful one shaped like a lung. The coordinates are given as an "X" and a "Y" which you can locate along the x-axis and the y-axis of normal graph paper. If you want something fancy, you can download a full colour one with the X and Y axis labeled with a scale....


3

These are independent things. Color-space represents all possible colors and is a continuous space. Digital devices require a discretization of the space. This means the steps at each they can represent colors that are within the color space. Here is a simple analogy: Thing about the height between two floors as a color-space. That is the space between the ...


3

You don't need any software to compare gamut coverages For what it's worth, you can get the three X-Y chromaticity coordinates from the monitor manufacturer and the three from the ink manufacturer and plot them on a plain X-Y coordinate graph paper. Connect the apex points with lines and compare/look at them directly. The two shapes will overlap. Parts that ...


3

Spyder's software is probably going to suck horribly, you should be using Dispcal GUI. It's going to be sRGB (normal gamut) -- see post 5, here: http://www.notebookcheck.net/Review-Apple-MacBook-Pro-15-Retina-2-3-GHz-Mid-2012.78959.0.html Backlight is LED, third post here: https://www.ifixit.com/Answers/View/190272/No+backlight+after+LCD+replacement .. I ...


2

Lets try a simple example. Lets say we have a color space called "rainbow". It contains the colors of a rainbow, so it is made up of red, orange, yellow, green, blue and violet. The color space describes a range of colors that are covered by the gamut. Bit depth on the other hand defines how many distinct colors we can make within that space. If we only ...


2

viewgam from ArgyllCMS will generate an HTML page with rotatable 3D view. http://www.argyllcms.com/doc/viewgam.html Convert one or more gamuts into a X3DOM 3D visualization file. This allows visual comparison of several gamut surfaces. Also allows creating the intersection (overlap) between two gamuts. This is useful in measuring and visualizing the ...


2

Imatest has released the latest GamutVision 1.4 as a free, GPL licensed product for Macs and Windows. http://www.gamutvision.com/docs/smudged_pines.html It has a large number of features including 3D gamut display of profiles and is especially useful for examining printer profiles. Amongst its many features is the ability to display whether, and how much, ...


2

Modern color imaging is based on the 19th century trichromatic color theory of color vision proposed by Young. The first color picture was made in 1861 by James Clark Maxwell using three pieces of black & white film exposed sequentially thru red, green and blue filters. Black & white slides were prepared and projected on a screen, one projector ...


2

It is true that DSLR makers don't provide chromaticity diagrams for their cameras, they usually encode their images using sRGB or Adobe 1998 RGB colourspaces like @MirekE stated it. Any colour lying outside those colourspaces gamut is clipped on casual RAW conversion, even if the camera captured it. It is also incorrect to think that RAW files don't have a ...


2

Yes. This is called colour proofing. First, make sure you have colour management enabled, that is, the image has a colur profile assigned (check in Edit −> Assign Profile), and generally the colour seetings are set as required (Edit −> Color Settings and the display profile in your OS). Thus, you ensure that the image is correctly displayed on your ...


1

Just thinking creatively here. Is it possible to replace an ink color in an Epson 3880 with a completely different color in order to increase color gamut in the ranges that I typically use in my prints? Possible, no. Instead of "a completely different color" you'd want to use "a somewhat similar color". Darker or lighter, and run the ...


1

Cameras can shoot either in RAW, sRGB or AdobeRGB. For sRGB and AdobeRGB the gamut is given. RAW files do not have gamut, you need to convert the image to some color representation like RGB to get gamut and that is a process that happens outside of the camera and the gamut will depend on the editor, profiles and the taste of the person who operates the ...


1

Mac has a free gamut preview tool and you can compare two gamuts as well. It is part of the system ColorSync utility. It shows the gamut in 3D. I think I've seen a web based viewer once, not sure if it still exists. Argyll CMS package can show gamuts, not sure if it can overlap two in one plot.


1

Out of gamut warnings have no well defined meaning using Perceptual Intent because all possible colors are supposed to be mapped to printable colors and compressed near the gamut boundaries. Ideally, the profile Perceptual tables can invert the printed color values to produce the originals. Out of Gamut warnings are meaningful with Relative and Absolute ...


1

I use a program called PerfX. It seems a little hard to find a download right now, but you can get it at https://web.archive.org/web/20080511211242/http://www.tglc.com/english/PerfX/3D_Gamut_Viewer.html


1

There are a few points to your question I'm unclear on, this is too long for a comment, and I think it also works to answer the question. So, focusing really only on the first profile: It sounds like you are using the stock Epson printer profile, correct? How far out of gamut were the colors, as reported by LR's soft proof? Just a little out of gamut, or a ...


1

The problem with CMYK printers is that they cannot make saturated colours as bright as unsaturated colours. LCD is somewhat similar to CMYK printer from this point of view but printer is more limited nonetheless. You will probably see that colours are not out of gamut anymore if you decrease exposure.


1

The issue is not in the media itself, the real issue may also be the canned ICC profile for that media. If you want to test the media only remove the variable if the canned profile. Create a new one, then test. Gamut surface colors are affected by paper coating also, there are tow types, Microporous and Microcrystalline, The microporous coatings absorb ...


1

A big part of it is how much light the paper reflects. There is also a question of how much the ink or pigment absorbs in to the paper vs sitting on the top. This can pretty radically impact the gamut of the images. Arguably paper makes a bigger difference than ink, though the number of colors of ink does make a difference as well, particularly when ...


1

An easy way to think about such things is that color spaces are containers. They contain the color values of the color space they were created for. If they are RGB color spaces the values are RGB- 0-255 in each channel. If CMYK 0-100 values. Those values do not change if the volume of the color space does. What changes the volume of a color space is ...


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