מערכות ראיה ושמיעה visual and auditory systems. spectrum
Post on 20-Dec-2015
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מערכות ראיה ושמיעהVisual and Auditory SystemsVisual and Auditory Systems
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Spectrum
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Photometry• Measuring light …
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Colorimetry• Modeling of color sensation
• Color addition• Color subtraction• Image processing
(noise removal, edge detection, compression, inpainintg etc.)
Bayer filter
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Colorimetry• CIE
standard observer
• RGBcolor addition
• HSV• CMYK
color subtraction
• YIQ, YUVtelevision broadcasting
• YCbCrdigital television transmission, JPEG
CIE gamut
HSV gamut
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• Dichromatism:
Colorimetry
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The Human Visual System (HVS)
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The Human Visual System (HVS)
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Vision Research• Physiology• Psychophysics
Automatic Gain Control
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Hermann’sGrid
Vision Research
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Vision Research• HVS is sensitive to:
• Local features.• Spatial frequency (gratings).
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Contrast Sensitivity Function
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Signal Representation• How does the HVS represent
images?• Fourier series.• Gabor functions.• Wavelets
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The Ear
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Subjective Hearing
• Properties of the human auditory system are utilized in audio compression algorithms such as MP3.
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