منابع مشابه
Seeing lightness in the dark.
From intense sunlight in bright snow down to a moonless night in a dark forest, we can use light to recognize objects and guide our actions. This remarkable range mainly rests on having two different types of photoreceptors, the rods and the cones. The cones are active under daylight conditions, allowing high acuity and color vision. Rods are mainly active under very dim illumination conditions...
متن کاملLightness Perception: Seeing One Color through Another
A newly described and dramatic visual illusion suggests that the retinal image is decomposed by the brain into overlapping layers, not into contiguous frameworks of illumination.
متن کاملBiological Optics: Seeing Colours in the Dark
The intensity threshold of colour vision has been behaviourally tested in birds; the results show that parrots lose colour vision in brighter light than humans.
متن کاملSeeing People in the Dark: Face Recognition in Infrared Images
An IR image of the human face presents its unique heat-signature and can be used for recognition. The characteristics of IR images maintain advantages over visible light images, and can be used to improve algorithms of human face recognition in several aspects. IR images are obviously invariant under extreme lighting conditions (including complete darkness). The main findings of this research a...
متن کامل“Seeing” in the Dark: Neuromorphic VLSI Modeling of Bat Echolocation
E choes are a major part of our daily auditory lives. Yet, very few of us are even aware that we use them constantly to understand the space around us. The bats of the suborder Microchiroptera have made echo detection their primary sensory modality for guiding agile flight in cluttered, threedimensional (3-D) environments and for capturing flying insects in complete darkness. The attempt to und...
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ژورنال
عنوان ژورنال: Current Biology
سال: 2017
ISSN: 0960-9822
DOI: 10.1016/j.cub.2017.05.008