Convert the RGB image to the L*a*b* color space. lab = rgb2lab(rgb);

You can calculate subjective brightness of an RGB value by weighting the three channels according to their perceived brightness, e.g. with something like: (0.21 × R) + (0.72 × G) + (0.07 × B) So, for instance, that makes yellow ( #ffff00 ) twice as intense as red ( #ff0000 ).

You should read about LAB Color Space. Its main advantage on RGB is by having 1 channel dedicated to the Luminosity of the Image and 2 others dedicated to the color information. This means if you need to process only Luminosity / Color you can do that using LAB without having any effect on Color / Luminosity.

Saturation is calculated using something similar to: S = [(MaxColor – MinColor) / (MaxColor + MinColor)] (with a 255 ceiling limit) where MaxColor is the highest value of (R, G, B) and MinColor is the lowest of (R, G, B).

RGB operates on three channels: red, green and blue. Lab is a conversion of the same information to a lightness component L*, and two color components – a* and b*. Lightness is kept separate from color, so that you can adjust one without affecting the other.

A color measurement movement in the +a direction depicts a shift toward red. Along the b* axis, +b movement represents a shift toward yellow. The center L* axis shows L = 0 (black or total absorption) at the bottom. At the center of this plane is neutral or gray.

Here are 3 ways to calculate Luminance:

1. Luminance (standard for certain colour spaces): (0.2126*R + 0.7152*G + 0.0722*B) source.
2. Luminance (perceived option 1): (0.299*R + 0.587*G + 0.114*B) source.

The brightness depends on only two things: the luminosity of the light-bulb, and the distance from the bulb to the screen. Here the denominator is just the area of a sphere of radius D. All that this formula says is that brightness is the luminosity divided by the area which is illuminated.

Lab color space is a 3-axis color system with dimension L for lightness and a and b for the color dimensions. Working with the Lab color space includes all of colors in the spectrum, as well as colors outside of human perception. For more information on Lab color, see the Image Processing Toolbox™ documentation.

Take the temperature of the system for which you want to determine saturation pressure. Record the temperature in degrees Celsius. Add 273 to the degrees Celsius to convert the temperature to Kelvins. Calculate saturation pressure using the Clausius-Clapeyron equation.

The saturation of a color is determined by a combination of light intensity and how much it is distributed across the spectrum of different wavelengths. The purest (most saturated) color is achieved by using just one wavelength at a high intensity, such as in laser light.

Saturation is the intensity of a hue from gray tone (no saturation) to pure, vivid color (high saturation). Brightness is the relative lightness or darkness of a particular color, from black (no brightness) to white (full brightness). Brightness is also called Lightness in some contexts, in particular in SQL queries.

Light Saturation Point. Umol or micromole measures the amount of photons (light particles) that cover a specific area over a specific amount of time (per/s or per/day) when you can achieve maximum photons absorbable by your plant species this is called light saturation point (LSP).

The color system contains 5 colors that explain the problems associated with the various other intercourse. It is an alternate system into the 0-10 quantity system. It isn’t exactly like the amount system in that it includes more than just physical appearance, in addition it has got the mental aspect included.

Colour Design is about gaining knowledge and skill in understanding the psychology of colour and the application of colour to numerous environments. It is a skill that is applicable to residential or commercial design projects, colour development product ranges, product design, corporate marketing, and branding.