Human visual system model
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.
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- enA 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.
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- enA 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.
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- Human visual system model
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- enHuman visual system model
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- Category:Image processing
- Cathode-ray tube
- Chroma subsampling
- Color television
- Complex system
- Computer vision
- Data compression
- Depth perception
- Flicker fusion threshold
- Hollow-face illusion
- Image processing
- Interlaced video
- JPEG
- Lossy compression
- Low-pass filter
- Mach bands
- Motion estimation
- Peripheral vision
- Psychoacoustics
- Steganography
- Video processing
- Visual perception
- Visual system
- Watermark
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- 4n5Ah
- m.03nrdpm
- Q5939193
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- Category:Image processing
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- Human visual system model?oldid=1112408714&ns=0
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- 3248
- Wikipage page ID
- 15728786
- Wikipage revision ID
- 1112408714
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