Identifying an area of interest using histogram data arranged in predetermined sequence
US5588071A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 26, 1994 |
| Grant date | Dec 24, 1996 |
| Priority date | — |
| Expiry date | Oct 26, 2014 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/30061
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A method for automatic analysis and enhancement of digitized images to identify the area of interest (AOI) from background areas divides a digitized image into a number of regions, and calculates histograms of gray scale or density for each region. An image of the regions in histogram space is created according to a selected sequence of the regions, chosen to preserve spatial proximity. This image is then processed by peak detection to identify features grouped spatially and by similarity of histograms. From this the AOI is identified, and the contrast enhancement is applied to the original image, according to the characteristics of the output device. The method is particularly adapted for enhancing medical X-ray images, for output to viewing devices.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.