Image signal processing method and image signal processing device
US5852648A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | May 22, 1997 |
| Grant date | Dec 22, 1998 |
| Priority date | — |
| Expiry date | May 22, 2017 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30021
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A display signal of high contrast is generated by processing an image signal that is acquired from a camera such as an infra-red or X-ray camera. The method involves: dividing a screen into polygons, finding signal intensities of pixels in these polygons by interpolation from the original image signal intensities of pixels corresponding to the vertices of these polygons as a signal intensity LF of a low frequency component; finding the signal intensities HF of high frequency components of these pixels by performing calculation to subtract the signal LF of this low frequency component from the original image signal S at each pixel; finding, for the signal intensities HF of these high frequency components, from a histogram showing the rate of occurrence numbers of the respective signal intensities, a transformation function IHS including the integrated values of these rate of occurrence numbers up to respective signal intensities; transforming the signal intensities of the high frequency components HF into display signal intensities DHF in accordance with this transformation function IHS; and finding the display signal DP of these pixels by adding to the display signals DHF of these …
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.