Image processing apparatus in which filtering is selected for input image characteristics
US5392137A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Apr 28, 1993 |
| Grant date | Feb 21, 1995 |
| Priority date | — |
| Expiry date | Apr 28, 2013 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/4092
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
An image processing apparatus includes a reading part for optically reading an input image signal from an original document, a first filtering part for outputting a first image signal by processing the input image signal through an edge sharpening filter, a second filtering part for outputting a second image signal by processing the input image signal through a smoothing filter, a detecting part for detecting an edge quantity of the input image signal, a correcting part for outputting a first edge quantity by correcting the edge quantity, a mixing part for mixing two image signals from among the input image signal, the first image signal, and the second image signal in accordance with a mixing factor so that an image signal obtained by the mixing is output to a recording unit, and a mixing control part for determining the mixing factor in response to the first edge quantity output from the correcting part, and for supplying the mixing factor to the mixing part.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.