- published: 24 Feb 2016
- views: 1551
A color model is an abstract mathematical model describing the way colors can be represented as tuples of numbers, typically as three or four values or color components. When this model is associated with a precise description of how the components are to be interpreted (viewing conditions, etc.), the resulting set of colors is called color space. This section describes ways in which human color vision can be modeled.
One can picture this space as a region in three-dimensional Euclidean space if one identifies the x, y, and z axes with the stimuli for the long-wavelength (L), medium-wavelength (M), and short-wavelength (S) light receptors. The origin, (S,M,L) = (0,0,0), corresponds to black. White has no definite position in this diagram; rather it is defined according to the color temperature or white balance as desired or as available from ambient lighting. The human color space is a horse-shoe-shaped cone such as shown here (see also CIE chromaticity diagram below), extending from the origin to, in principle, infinity. In practice, the human color receptors will be saturated or even be damaged at extremely high light intensities, but such behavior is not part of the CIE color space and neither is the changing color perception at low light levels (see: Kruithof curve).
An RGB color space is any additive color space based on the RGB color model. A particular RGB color space is defined by the three chromaticities of the red, green, and blue additive primaries, and can produce any chromaticity that is the triangle defined by those primary colors. The complete specification of an RGB color space also requires a white point chromaticity and a gamma correction curve. As of 2007, sRGB is by far the most commonly used RGB color space.
RGB is an abbreviation for red–green–blue.
An RGB color space can be easily understood by thinking of it as "all possible colors" that can be made from three colourants for red, green and blue. Imagine, for example, shining three lights together onto a white wall: one red light, one green light, and one blue light, each with dimmer switches. If only the red light is on, the wall will look red. If only the green light is on, the wall will look green. If the red and green lights are on together, the wall will look yellow. Dim the red light and the wall will become more of a yellow-green. Dim the green light instead, and the wall will become more orange. Bringing up the blue light a bit will cause the orange to become less saturated and more whitish. In all, each setting of the three dimmer switches will produce a different result, either in color or in brightness or both. The set of all possible results is the gamut defined by those particular color lamps. Swap the red lamp for one of a different brand that is slightly more orange, and there will be a slightly different gamut, since the set of all colors that can be produced with the three lights will be changed.
We know what RGB is, but what are some similar ways to express color, and how are they used? = Credits = I wish to express my graditude to the creators of the following external assets: "Simplified human cone response curves" by Vanessaezekowitz Hosted on Wikipedia: https://en.wikipedia.org/wiki/File:Cones_SMJ2_E.svg Licensed under CC-BY-3.0 Full Text available here: https://creativecommons.org/licenses/by/3.0/legalcode = 0612 TV = 0612 TV is your one stop for general geekery! Learn about a variety of technology-related subjects, including Photography, General Computing, Audio/Video Production and Image Manipulation! Enjoy your stay, and don't hesitate to drop me a comment or a personal message to my inbox =) If you like my work, don't forget to subscribe! Support me on Patreon: http:/...
In this video we show very briefly how to create the RGB color model using the cartesian coordinate system. We also created a 3D animation in octave with the color cube creation. R, G and B are the axes varying from 0 to 1, and the combination of the three components will define the colors inside this 3D cube.
In this video we explain the HSV color model and provide an animation on how to create the HSV color cylinder. As follows, the source code (in octave) to create the steps for the animation: please replace the some markers by the corresponding symbol (youtube does not allow), such as |open_brackets|, or |close_braces|, etc clear all; figure(1); clear plot; clf; MIN_I = 0; STEP_I = 0.075; MAX_I = 1; MIN_S = 0; STEP_S = 0.1; MAX_S = 1; MIN_H = 0; STEP_H = 10; MAX_H = 360; vector_i = |open_brackets||close_brackets|; vector_h = |open_brackets||close_brackets|; vector_s = |open_brackets||close_brackets|; my_struct = struct(); position_size = 0; for i = MIN_I:STEP_I:MAX_I for s = MIN_S:STEP_S:MAX_S for h = MIN_H:STEP_H:MAX_H if (s |less_than| 0.2) h += STEP_H; endi...
What are the differences between RGB, CMYK, and HSB(V)? This is a brief explanation of what color means to computers, printers, and humans. Minute Markers: -2:19- Hue, Saturation, Brightness (or Value) -3:40- Remember to choose your destination: CMYK / RGB.
http://www.presscats.com What is the difference between the RGB color space and the CMYK color space? Find out as Ken from PressCats.com discusses the benefits and drawbacks of both RGB and CMYK and how you can get the best printed output from your design projects. This beginners guide to color spaces is a must for every student of print design. Featuring printing for graphic designers, PressCats.com is committed to affordable printing. That's why PressCats.com is known as The Graphic Designers Printer.
Step by step description about the Color Model usage.
In This Video you will see what are primary and secondary colours, how they connected to each other. how to test in Photoshop. this is HIndi Photoshop Tutorial continue in Next Episode. Please watch 01 to 35 Basic Photoshop video for Better Understand about Photoshop and if you are starting today to learn Photoshop. These video classes / tutorials are for beginners in Hindi. visit at www.sanjayphotoworld.com like page on facebook www.facebook.com/sanjayphotoworld Please comment in below comment box about video.
We know what RGB is, but what are some similar ways to express color, and how are they used? = Credits = I wish to express my graditude to the creators of the following external assets: "Simplified human cone response curves" by Vanessaezekowitz Hosted on Wikipedia: https://en.wikipedia.org/wiki/File:Cones_SMJ2_E.svg Licensed under CC-BY-3.0 Full Text available here: https://creativecommons.org/licenses/by/3.0/legalcode = 0612 TV = 0612 TV is your one stop for general geekery! Learn about a variety of technology-related subjects, including Photography, General Computing, Audio/Video Production and Image Manipulation! Enjoy your stay, and don't hesitate to drop me a comment or a personal message to my inbox =) If you like my work, don't forget to subscribe! Support me on Patreon: http:/...
In this video we show very briefly how to create the RGB color model using the cartesian coordinate system. We also created a 3D animation in octave with the color cube creation. R, G and B are the axes varying from 0 to 1, and the combination of the three components will define the colors inside this 3D cube.
In this video we explain the HSV color model and provide an animation on how to create the HSV color cylinder. As follows, the source code (in octave) to create the steps for the animation: please replace the some markers by the corresponding symbol (youtube does not allow), such as |open_brackets|, or |close_braces|, etc clear all; figure(1); clear plot; clf; MIN_I = 0; STEP_I = 0.075; MAX_I = 1; MIN_S = 0; STEP_S = 0.1; MAX_S = 1; MIN_H = 0; STEP_H = 10; MAX_H = 360; vector_i = |open_brackets||close_brackets|; vector_h = |open_brackets||close_brackets|; vector_s = |open_brackets||close_brackets|; my_struct = struct(); position_size = 0; for i = MIN_I:STEP_I:MAX_I for s = MIN_S:STEP_S:MAX_S for h = MIN_H:STEP_H:MAX_H if (s |less_than| 0.2) h += STEP_H; endi...
What are the differences between RGB, CMYK, and HSB(V)? This is a brief explanation of what color means to computers, printers, and humans. Minute Markers: -2:19- Hue, Saturation, Brightness (or Value) -3:40- Remember to choose your destination: CMYK / RGB.
http://www.presscats.com What is the difference between the RGB color space and the CMYK color space? Find out as Ken from PressCats.com discusses the benefits and drawbacks of both RGB and CMYK and how you can get the best printed output from your design projects. This beginners guide to color spaces is a must for every student of print design. Featuring printing for graphic designers, PressCats.com is committed to affordable printing. That's why PressCats.com is known as The Graphic Designers Printer.
Step by step description about the Color Model usage.
In This Video you will see what are primary and secondary colours, how they connected to each other. how to test in Photoshop. this is HIndi Photoshop Tutorial continue in Next Episode. Please watch 01 to 35 Basic Photoshop video for Better Understand about Photoshop and if you are starting today to learn Photoshop. These video classes / tutorials are for beginners in Hindi. visit at www.sanjayphotoworld.com like page on facebook www.facebook.com/sanjayphotoworld Please comment in below comment box about video.
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