Imaging system for correction of perceptual distortion in wide angle images
US5999660A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jul 26, 1995 |
| Grant date | Dec 7, 1999 |
| Priority date | — |
| Expiry date | Jul 26, 2015 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T3/12
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
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.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.