threshold contrast

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threshold contrast [′thresh‚hōld ¦kän‚trast]

(optics)

The smallest contrast of luminance (or brightness) that is perceptible to the human eye under specified conditions of adaptation luminance and target visual angle. Also known as contrast sensitivity; contrast threshold; liminal contrast.

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No references found			With the threshold contrast set to 5% (CIE, 1987), this definition yields the following expression: [V. Blind contrast enhancement assessment by gradient ratioing at visible ... by Hautiere, Nicolas; Tarel, Jean-Philippe; Aubert, Didier; Dumont, Eric / Image Analysis and Stereology			three-room plan three-shift cyclic mining three-space three-state logic element three-tier three-tier client/server Three-Toed Woodpecker three-way strap three-way switch three-wire generator three-wire system threefold threeling threesome threnody Threonine thresh Thresher thresher shark Threshing threshing barn Threshing Barn Fodders Threshing Floor threshing machine threshold threshold contrast threshold current Threshold Density threshold depth threshold detector Threshold Device threshold dose threshold element threshold frequency threshold illuminance threshold lights threshold limit value threshold of audibility threshold of detectability threshold of feelings Threshold of Hearing threshold of intelligibility for speech Threshold of Pain threshold of reaction Threshold of Stimulation Threshold Signal threshold speed threshold switch threshold treatment threshold value threshold velocity			Thresher-Separator Threshers Threshers threshes threshes threshes threshing threshing threshing threshing barn Threshing Barn Fodders threshing floor threshing floor threshing floors threshing floors threshing machine threshing machine Threshing machines Threshing machines threshold threshold threshold threshold threshold threshold threshold threshold agreement Threshold Ambient Level Threshold and Merge Prefixes Threshold Collision-Induced Dissociation threshold contrast Threshold Contrast Detail Detectability Threshold Crossing Alarm Threshold Crossing Alert Threshold Crossing Height Threshold Crossing Height Downwind Threshold Crossing Height Upwind threshold current Threshold Density threshold depth threshold detector Threshold Device threshold dose threshold dose threshold dose threshold dose threshold dose threshold dose Threshold Effects Concentration threshold element threshold element Threshold Error Correction Model threshold erythema dose threshold erythema dose threshold erythema dose threshold erythema dose threshold erythema dose Threshold Exceeds Condition threshold exposure threshold exposure threshold exposure

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