Lightness is expressed by the L channel in CIE Lab and Luv 1976 and the J channel in JzAzBz. 4 Lightness is the perceptual, non-linear homologue of luminance (roughly equal to the cubic root of luminance Y).
3 lightness The brightness of an area judged relative to the brightness of a similarly illuminated area that appears to be white or highly transmitting. brightness An attribute of visual perception according to which an area appears to emit, transmit or reflect more or less light. 2 Luminance is a property of scene-referred frameworks, and is expressed by the Y channel of the CIE XYZ 1931 space.
luminance The density of luminous intensity with respect to a projected area in a specified direction at a specified point on a real or imaginary surface. 1 Hue is a shared property between the perceptual and scene-linear frameworks. The following dimensions of color are used by darktable: hue An attribute of visual perception in which an area appears to be similar to one of the colors red, yellow, green, or blue, or to a combination of adjacent pairs of these colors considered in a closed ring. These two frameworks provide us with metrics and dimensions to analyze color and allow us to change some of its properties while preserving others. A perceptual, psychological, framework that stacks the brain’s corrections on top of the retina signal, using color spaces such as CIE Lab 1976, CIE Luv 1976, CIE CAM 2016 and JzAzBz (2017).A scene-linear, physiological, framework, that mostly focuses on the response of the retina cone cells, using color spaces such as CIE XYZ 1931 or CIE LMS 2006,.
There are two frameworks within which color properties may be analyzed and described: In color science, each of these terms has a precise meaning. 🔗definitionsĬolor properties like “saturation”, “brightness” or “lightness” have passed into common usage but are largely misused and often used to mean different things. This section defines the perceptual properties of color, both conceptually and quantitatively, in order to characterize and quantify the creative and corrective adjustments made to color in darktable.
0 kommentar(er)
