Image signal processing apparatus
US5555095A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Mar 18, 1993 |
| Grant date | Sep 10, 1996 |
| Priority date | — |
| Expiry date | Mar 18, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/401
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image signal processing apparatus to realize a signal processing system and apparatus constitution, where an image signal inputted using a photoelectric conversion element, such as a CCD or a contact type image sensor, is obtained in a circuit of small scale with high picture quality. In order to solve various problems, data width of a signal referred to in a shading corrector, an MTF corrector and an error diffusion circuit is made b+f+j.ltoreq.8 per one pixel, the error component commonly possessed by plural pixels (N pixels) in the error diffusion circuit is made b+f+j'.ltoreq.8, the data width per one pixel being j'=j/N. Image signal processing is realized in this constitution, whereby the data width of a signal referred to in respective signal processings is reduced, and an image signal satisfying the accuracy of signal processing sufficiently and having a high picture quality can be obtained. For example, when a circuit is constituted by an LSI, the memory section can be easily mounted on the same LSI. A memory required in the image signal processing can be made 8 bits per one pixel and a cheap memory constitution can be utilized.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.