Image processing apparatus
US4817174A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Jan 21, 1987 |
| Grant date | Mar 28, 1989 |
| Priority date | — |
| Expiry date | Jan 21, 2007 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20192
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
An image processing apparatus includes a density detector for detecting the density of an image by a CCD. The CCD has a plurality of sets of pixels, each set of pixels is defined by the neighboring pixels. The apparatus also includes a calculator for calculating the sum of the image densities detected by the pixels of each set and for further calculating a difference between the sums. If the difference is greater than a predetermined level, it means that the contour is present between the sets of pixels. An image processing unit is provided for increasing or decreasing the density of the image for the contour enhancement when the contour is detected.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.