Lightness
Lightness is a visual perception of the luminance of an object. It is often judged relative to a similarly lit object. In colorimetry and color appearance models, lightness is a prediction of how an illuminated color will appear to a standard observer. While luminance is a linear measurement of light, lightness is a linear prediction of the human perception of that light. This is because human vision's lightness perception is non-linear relative to light. Doubling the quantity of light does not result in a doubling in perceived lightness, only a modest increase.
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- enA full-color image shows a high-contrast and quite dramatic scene of a fire breather with a large orange-yellow flame extending from his lips. He wears dark but colorful orange-red clothing.
- enA grayscale image showing the CIELAB lightness component of the photograph appears to be a faithful rendering of the scene: it looks roughly like a black-and-white photograph taken on panchromatic film would look, with clear detail in the flame, which is much brighter than the man's outfit or the background.
- enA grayscale image showing the HSL lightness component of the photograph renders the flame, as approximately middle gray, and ruins the dramatic effect of the original by radically reducing its contrast.
- enA grayscale image showing the HSV value component of the photograph leaves the flame completely white , and the man's clothing much too bright.
- enA grayscale image showing the component average of the photograph is much a less convincing facsimile of the color photograph, with reduced contrast, especially with its flame darker than in the original.
- enA grayscale image showing the luma appears roughly similar to the CIELAB lightness image, but is a bit brighter in areas which were originally very colorful.
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- enFig 2a. The sRGB gamut mapped in CIELAB space. Notice that the lines pointing to the red, green, and blue primaries are not evenly spaced by hue angle, and are of unequal length. The primaries also have different L* values.
- enFig 2b. The Adobe RGB gamut mapped in CIELAB space. Also notice that these two RGB spaces have different gamuts, and thus will have different HSL and HSV representations.
- enFig. 1a. Color photograph .
- enFig. 1b. CIELAB L* .
- enFig. 1c. Rec. 601 luma
- enFig. 1e. HSV value V.
- enFig. 1f. HSL lightness L.
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- Comment
- enLightness is a visual perception of the luminance of an object. It is often judged relative to a similarly lit object. In colorimetry and color appearance models, lightness is a prediction of how an illuminated color will appear to a standard observer. While luminance is a linear measurement of light, lightness is a linear prediction of the human perception of that light. This is because human vision's lightness perception is non-linear relative to light. Doubling the quantity of light does not result in a doubling in perceived lightness, only a modest increase.
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- enLightness is a visual perception of the luminance of an object. It is often judged relative to a similarly lit object. In colorimetry and color appearance models, lightness is a prediction of how an illuminated color will appear to a standard observer. While luminance is a linear measurement of light, lightness is a linear prediction of the human perception of that light. This is because human vision's lightness perception is non-linear relative to light. Doubling the quantity of light does not result in a doubling in perceived lightness, only a modest increase. The symbol for perceptual lightness is usually either as used in CIECAM02 or as used in CIELAB and CIELUV. ("Lstar") is not to be confused with as used for luminance. In some color ordering systems such as Munsell, Lightness is referenced as value. Chiaroscuro and Tenebrism both take advantage of dramatic contrasts of value to heighten drama in art. Artists may also employ shading, subtle manipulation of value.
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- enFire breathing 2 Luc Viatour.jpg
- enFire-breather 601 Luma Y'.jpg
- enFire-breather CIELAB L*.jpg
- enFire-breather HSL L.jpg
- enFire-breather HSV V.jpg
- enFire-breather mean I.jpg
- enadobergb-in-cielab.png
- ensrgb-in-cielab.png
- Is primary topic of
- Lightness
- Label
- enLightness
- Link from a Wikipage to another Wikipage
- Adobe RGB color space
- Albert Henry Munsell
- Alexander Ector Orr Munsell
- Brightness
- Candela per square metre
- Category:Color
- Category:Photometry
- Category:Vision
- Chiaroscuro
- CIE 1931 color space
- CIE 1964 color space
- CIECAM02
- CIECAM97s
- CIELAB
- CIELAB color space
- CIELUV
- CIE XYZ
- Color
- Color appearance model
- Color difference
- Colorfulness
- Colorimetry
- Contrast effect
- Cube root
- Deane B. Judd
- Diffuser (optics)
- Domina Eberle Spencer
- Dorothea Jameson
- Dorothy Nickerson
- Eastman Kodak
- Extrapolation
- File:ColorValue.svg
- File:Lightness approximations.svg
- Gamma correction
- Grey card
- Günter Wyszecki
- Harry John McNicholas
- Helmholtz–Kohlrausch effect
- International Commission on Illumination
- Irwin G. Priest
- Isaac Hahn Godlove
- Jason L. Saunderson
- Kasson S. Gibson
- Leo Hurvich
- Louise L. Sloan
- Luminance
- Magnesium oxide
- Michaelis–Menten kinetics
- Middle gray
- Munsell color system
- Optical Society of America
- Parry Moon
- Power-law
- Purkinje effect
- Relative luminance
- Shading
- Sidney Newhall
- Sigmoid function
- SRGB
- Stevens' power law
- Stevens's power law
- Subtractive color
- Television
- Tenebrism
- Tint, shade and tone
- Weber–Fechner law
- White point
- SameAs
- Helligkeit (Farbe)
- Intensiteit (kleur)
- Kebercahayaan
- Ligheid
- Luminosidad (color)
- Luminosidade (cor)
- Luminosité (colorimétrie)
- Lyshet
- m.0280ptk
- Q19426
- rWyq
- Tono (pittura)
- Светлата
- Светлота (цвет)
- إضاءة اللون
- روشنی
- 明度
- Subject
- Category:Color
- Category:Photometry
- Category:Vision
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- Wikipage page ID
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- Wikipage revision ID
- 1115703348
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