| dbo:abstract |
A human visual system model (HVS model) is used by image processing, video processing and computer vision experts to deal with biological and psychological processes that are not yet fully understood. Such a model is used to simplify the behaviours of what is a very complex system. As our knowledge of the true visual system improves, the model is updated. Psychovisual study is the study of the psychology of vision. The human visual system model can be used to produce desired effects in perception and vision. Examples of using an HVS model include color television, lossy compression, and Cathode-ray tube (CRT) television. Originally it was thought that colour television required too high a bandwidth for the then available technology. Then it was noticed that the colour resolution of the HVS was much lower than the brightness resolution; this allowed colour to be squeezed into the signal by chroma subsampling. Another example is lossy image compression, like JPEG. Our HVS model says that we cannot see high frequency detail so in JPEG we can quantise these components without a perceptible loss of quality. Similar concepts are applied in audio compression, where sound frequencies inaudible to humans are bandstop filtered. Several HVS features are derived from evolution, when we needed to defend ourselves or hunt for food. We often see demonstrations of HVS features when we are looking at optical illusions. (en) |
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dbr:Visual_perception dbr:Visual_system dbr:Depth_perception dbr:Psychoacoustics dbr:Complex_system dbr:Peripheral_vision dbr:Steganography dbr:Hollow-face_illusion dbr:Low-pass_filter dbr:Color_television dbr:Computer_vision dbr:Mach_bands dbr:Data_compression dbc:Image_processing dbr:Flicker_fusion_threshold dbr:Chroma_subsampling dbr:JPEG dbr:Interlaced_video dbr:Cathode-ray_tube dbr:Lossy_compression dbr:Watermark dbr:Image_processing dbr:Video_processing dbr:Motion_estimation |
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| rdfs:comment |
A human visual system model (HVS model) is used by image processing, video processing and computer vision experts to deal with biological and psychological processes that are not yet fully understood. Such a model is used to simplify the behaviours of what is a very complex system. As our knowledge of the true visual system improves, the model is updated. Psychovisual study is the study of the psychology of vision. (en) |
| rdfs:label |
Human visual system model (en) |
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freebase:Human visual system model wikidata:Human visual system model https://global.dbpedia.org/id/4n5Ah |
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wikipedia-en:Human_visual_system_model?oldid=1112408714&ns=0 |
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dbr:HVS |
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