7. Contrast
7.1 Definition
When we observe an object, either visually or with an optical instrument, we perceive it by its apparent luminance. However, this object is never present against a black background, so it stands out against this background, which also has a perceptible apparent luminance.
Given two sources of luminances L
1
and L
2
, we can define two quantities characterizing the contrast of source 1 with respect to source 2 :
The Ultimate Scientific and Technical Reference
This article is included in
Electronics
This offer includes:
Knowledge Base
Updated and enriched with articles validated by our scientific committees
Services
A set of exclusive tools to complement the resources
Practical Path
Operational and didactic, to guarantee the acquisition of transversal skills
Doc & Quiz
Interactive articles with quizzes, for constructive reading
Contrast
Atmospheric turbulence
The Ultimate Scientific and Technical Reference
