Apparatus and method for detecting distortions in processed image data
US5621821A · kind A · utility
Assignees
Inventors
Key dates
| Filing date | Dec 28, 1994 |
| Grant date | Apr 15, 1997 |
| Priority date | — |
| Expiry date | Dec 28, 2014 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N1/622
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A system for the analysis of image data 48 that has been subject to one or more processing operations is described. The image data is displayed using a display palette 30 which maps pixel values PV to displayable appearances RGB, I. Under user control, a sub-section of the pixel values are mapped to enhanced displayable appearances so as to make small variations in the pixel values more visible. A palette scale 54 illustrating the mapping being performed by the palette 30 is displayed adjacent to the image 48 being analyzed. In addition, a graph 60 of the variation of pixel value along a given analysis line 62 is displayed to assist quantative analysis.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.