Imaging system for correction of perceptual distortion in wide angle images
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United States of America Patent
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Dec 7, 1999
Grant Date -
N/A
app pub date -
Jul 26, 1995
filing date -
Jul 26, 1995
priority date (Note) -
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Abstract
An imaging system which corrects perceptual distortion in wide angle picture balances between direct view distortion and linear perspective distortion. The two kinds of distortion are balanced according to a transformation ratio. The balancing can be expressed as: and .phi.=.o slashed. where .rho. and .phi. are the transformed polar coordinates corresponding to the original polar coordinates r and .o slashed., .lambda. is the transformation ratio defining the amount of each transform to be used, and R is the size of the new image. This can also be effected by a lens having the transfer characteristic whereby B=tan .beta./K; where K is between 1 and 2.
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