vision
DESCRIPTION
Vision. Unit 4: Sensation & Perception. The Stimulus Input: Light Energy. Transduction (transform) Wavelength Hue (color) Wavelength Intensity Wave amplitude. Electromagnetic Energy Spectrum. Electromagnetic Energy Spectrum. Electromagnetic Energy Spectrum. - PowerPoint PPT PresentationTRANSCRIPT
![Page 1: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/1.jpg)
VisionUnit 4: Sensation & Perception
![Page 2: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/2.jpg)
The Stimulus Input: Light Energy
• Transduction (transform)• Wavelength• Hue (color)
–Wavelength• Intensity
–Wave amplitude
![Page 3: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/3.jpg)
Electromagnetic Energy Spectrum
![Page 4: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/4.jpg)
Electromagnetic Energy Spectrum
![Page 5: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/5.jpg)
Electromagnetic Energy Spectrum
![Page 6: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/6.jpg)
The Physical Property of Waves
![Page 7: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/7.jpg)
The Physical Property of Waves
![Page 8: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/8.jpg)
The Physical Property of Waves
![Page 9: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/9.jpg)
The Physical Property of Waves
![Page 10: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/10.jpg)
The Physical Property of Waves
![Page 11: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/11.jpg)
The Eye
• Cornea• Pupil• Iris• Lens
–accommodation• Retina
![Page 12: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/12.jpg)
The Structure of the Eye
![Page 13: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/13.jpg)
The Structure of the Eye
Cornea = outer covering of the eye.
![Page 14: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/14.jpg)
The Structure of the Eye
Pupil = the adjustable opening in the center of the eye through which light enters.
![Page 15: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/15.jpg)
The Structure of the Eye
Iris = a ring of muscle tissue that forms the colored portion of the eye around the pupil and controls the size of the pupil opening.
• The iris dilates/constricts in response to changing light intensity
![Page 16: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/16.jpg)
The Structure of the Eye
Lens = the transparent structure behind the pupil that changes shape to help focus images on the retina.
![Page 17: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/17.jpg)
The Structure of the Eye
Retina = the light-sensitive inner surface of the eye, containing the receptor rods and cones plus layers of neurons that begin the
processing of visual information.
![Page 18: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/18.jpg)
The EyeThe Retina
• Rods and Cones
RodsCones
![Page 19: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/19.jpg)
Rods versus Cones
![Page 20: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/20.jpg)
The Retina’s Reaction to Light
![Page 21: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/21.jpg)
The Retina’s Reaction to Light
![Page 22: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/22.jpg)
The Retina’s Reaction to Light
![Page 23: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/23.jpg)
The Retina’s Reaction to Light
![Page 24: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/24.jpg)
The Retina’s Reaction to Light
![Page 25: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/25.jpg)
The EyeThe Retina
• Optic nerve• Blind spot• Fovea
![Page 26: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/26.jpg)
The Structure of the Eye
Blind Spot = the point at which the optic nerve leaves the eye, creating a “blind” spot because no receptor cells are located there.
![Page 27: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/27.jpg)
The Structure of the Eye
Fovea = the central focal point in the retina, around which the eye’s cones cluster.
![Page 28: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/28.jpg)
The Structure of the Eye
Optic Nerve = the nerve that carries neural impulses from the eye to the brain.
![Page 29: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/29.jpg)
Visual Information ProcessingVisual Cortex
![Page 30: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/30.jpg)
Pathways from the eyes to the visual cortex
![Page 31: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/31.jpg)
Pathways from the eyes to the visual cortex
![Page 32: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/32.jpg)
Pathways from the eyes to the visual cortex
![Page 33: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/33.jpg)
Pathways from the eyes to the visual cortex
![Page 34: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/34.jpg)
Visual Information ProcessingFeature Detection
• Feature detectors
![Page 35: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/35.jpg)
Visual Information ProcessingParallel Processing
• Parallel processing–Blind sight
![Page 36: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/36.jpg)
Visual information processing
![Page 37: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/37.jpg)
Visual information processing
![Page 38: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/38.jpg)
Visual information processing
![Page 39: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/39.jpg)
Visual information processing
![Page 40: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/40.jpg)
Visual information processing
![Page 41: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/41.jpg)
Visual information processing
![Page 42: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/42.jpg)
Color Vision
• Young-Helmholtz trichromatic (three color) theory–Red – Green - Blue–Monochromatic
vision–Dichromatic
vision
![Page 43: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/43.jpg)
Color Vision
• Opponent-process theory–Three sets of colors
• Red-green• Blue-yellow• Black-white
–Afterimage
![Page 44: Vision](https://reader035.vdocument.in/reader035/viewer/2022062810/56815d7e550346895dcb8b87/html5/thumbnails/44.jpg)
After image