Pars reticulataThe pars reticulata (SNpr) is a portion of the substantia nigra and is located lateral to the pars compacta. Most of the neurons that project out of the pars reticulata are inhibitory GABAergic neurons (i.e., these neurons release GABA, which is an inhibitory neurotransmitter). Neurons in the pars reticulata are much less densely packed than those in the pars compacta (they were sometimes named pars diffusa). They are smaller and thinner than the dopaminergic neurons and conversely identical and morphologically similar to the pallidal neurons (see primate basal ganglia).
Blob detectionIn computer vision, blob detection methods are aimed at detecting regions in a that differ in properties, such as brightness or color, compared to surrounding regions. Informally, a blob is a region of an image in which some properties are constant or approximately constant; all the points in a blob can be considered in some sense to be similar to each other. The most common method for blob detection is convolution.
Contre-illuminationvignette|Principe de l'éclairage Yehudi. La contre-illumination est une forme de camouflage actif utilisée par des animaux (mollusques céphalopodes, qui émettent une lumière ventrale par bioluminescence) et des prototypes militaires (camouflage via un éclairage diffus, éclairage Yehudi) qui leur permettent de se confondre avec leurs arrière-plans, à la fois en termes de luminosité et de longueur d'onde. Elle se distingue de l'ombre inversée, camouflage passif. Liste des méthodes de camouflage Camouflage Da
Active camouflageActive camouflage or adaptive camouflage is camouflage that adapts, often rapidly, to the surroundings of an object such as an animal or military vehicle. In theory, active camouflage could provide perfect concealment from visual detection. Active camouflage is used in several groups of animals, including reptiles on land, and cephalopod molluscs and flatfish in the sea. Animals achieve active camouflage both by color change and (among marine animals such as squid) by counter-illumination, with the use of bioluminescence.
Éclairage Yehudivignette|Principe de l'éclairage Yehudi. L'éclairage Yehudi est une technique de camouflage militaire développée par la Marine américaine dans les années 1940. Il consiste en une série de lampes placées sur le côté inférieur ou le bord d'attaque de l'aile d'un avion afin d'augmenter la luminosité de l'appareil pour qu'elle corresponde à celle du ciel. De cette manière, l'aéronef n'apparait plus comme un objet sombre dans un ciel et est donc plus difficile à repérer.
