Resolution enhancement and zoom by degradation estimates
US4517599A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 1983 |
| Grant date | May 14, 1985 |
| Priority date | — |
| Expiry date | Jan 27, 2003 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N5/208
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
In this invention, the resolution is enhanced by first effectively decreasing the scan angle subtended between adjacent samples significantly below that of the Rayleigh limit to obtain an image blurred by the point spread function (or diffraction pattern) of the aperture. The next step is to process this blurred image to at least partially remove the blur. The unblurring process consists of convolving this finely sampled blurred image with a specially designed convolution mask. This mask effectively outputs an enhanced pixel at each step of the convolution. The mask simultaneously performs the equivalent of the following operations: PA0 (1) blur the image again; PA0 (2) subtract this reblurred image from the original image to form degradation estimates; and PA0 (3) add the estimates of the losses back into the original image.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.