Image processing apparatus capable of appriopriately encoding and processing entered image signals in accordance with the image content
US4729035A · kind A · utility
28Cited by
13References
23Claims
0Family size
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Key dates
| Filing date | May 21, 1984 |
| Grant date | Mar 1, 1988 |
| Priority date | — |
| Expiry date | May 21, 2004 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/40062
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processing apparatus capable of varying the method of binary encoding and processing in accordance with the content of the image, such as black-and-white image versus an image with intermediate tonal rendition. The image content is identified by detecting the maximum and minimum values of mutually neighboring plural pixels, and comparing the maximum value with a first reference value, the minimum value with a second reference value, and the difference between the maximum and minimum values with a third reference value.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.