human visual systems and perception n.
Download
Skip this Video
Loading SlideShow in 5 Seconds..
Human Visual Systems and Perception PowerPoint Presentation
Download Presentation
Human Visual Systems and Perception

Loading in 2 Seconds...

play fullscreen
1 / 15

Human Visual Systems and Perception - PowerPoint PPT Presentation


  • 355 Views
  • Uploaded on

Human Visual Systems and Perception. C. Edward Chow. Image in Human Eye. Rod and Cone Cell Distribution. Contrast Illusion . Demystify Illusion with Mach Bend Effect. Spatial Frequencies. Image can be considered as superposition of gratings of different spatial frequencies (cycles/degree).

loader
I am the owner, or an agent authorized to act on behalf of the owner, of the copyrighted work described.
capcha
Download Presentation

PowerPoint Slideshow about 'Human Visual Systems and Perception' - katherine


An Image/Link below is provided (as is) to download presentation

Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author.While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server.


- - - - - - - - - - - - - - - - - - - - - - - - - - E N D - - - - - - - - - - - - - - - - - - - - - - - - - -
Presentation Transcript
spatial frequencies
Spatial Frequencies
  • Image can be considered as superposition of gratings of different spatial frequencies (cycles/degree).

chow

visual acuity
Visual Acuity
  • Visual acuity: the smallest angular separation at which the individual lines can be distinguished.
  • Depend on contrast ratio and keenness of your eyes. 1.7’ is normal assumption= 60/(2*1.7’)~18 cycles/degree

chow

tristimulus curves
Tristimulus Curves
  • Devise a system with simple numbers to represents all colors. (How about all positive numbers?)
  • x,y,z are proportion of X primary, Y primary, Z primary (supersaturated red, green and blue)
  • x=X/(X+Y+Z); y=Y /(X+Y+Z); z=1-x-y

chow

cie x y z system
CIE {X,Y,Z} system
  • CIE: Commission Internationale de I’Eclairage, The International commission on color standards)
  • Figure 2.17b shows the corresponding amount of primaries needed to match all wavelengths of visible spectrum.

chow