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The input stage of a TV-computer reading system for the blind Tsang, Robert Chuen Bong
Abstract
The input stage of a TV-computer reading system has been built using state-of-the-art integrated circuits. A stroboscopic sampling method is used. Programs are developed to rearrange the input data for later processing. The system is also available to work as an image enlarger for people with low-vision. Judging from the appearance of the final displays, the signal-to-noise ratio is acceptable. The possibility of incorporating an automatic focus device is examined and an algorithm is developed to this end. Best focus is obtained by adjusting the camera's lens to maximize the ‘T’ function which is related to the differences in the greyness between samples. The hardware and software are developed for the TV camera to work with a PDP-12 computer as an input system. Suggestions for further improvements of the system are also included.
Item Metadata
Title |
The input stage of a TV-computer reading system for the blind
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Creator | |
Publisher |
University of British Columbia
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Date Issued |
1973
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Description |
The input stage of a TV-computer reading system has been built using state-of-the-art integrated circuits. A stroboscopic sampling method is used. Programs are developed to rearrange the input data for later processing. The system is also available to work as an image enlarger for people with low-vision. Judging from the appearance of the final displays, the signal-to-noise ratio is acceptable. The possibility of incorporating an automatic focus device is examined and an algorithm is developed to this end. Best focus is obtained by adjusting the camera's lens to maximize the ‘T’ function which is related to the differences in the greyness between samples. The hardware and software are developed for the TV camera to work with a PDP-12 computer as an input system. Suggestions for further improvements of the system are also included.
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Genre | |
Type | |
Language |
eng
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Date Available |
2011-03-18
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Provider |
Vancouver : University of British Columbia Library
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Rights |
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.
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DOI |
10.14288/1.0101282
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URI | |
Degree | |
Program | |
Affiliation | |
Degree Grantor |
University of British Columbia
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Campus | |
Scholarly Level |
Graduate
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Aggregated Source Repository |
DSpace
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Item Media
Item Citations and Data
Rights
For non-commercial purposes only, such as research, private study and education. Additional conditions apply, see Terms of Use https://open.library.ubc.ca/terms_of_use.