Method for rendering digital radiographic images for display based on independent control of fundamental image quality parameters
US7822256B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Jul 28, 2008 |
| Grant date | Oct 26, 2010 |
| Priority date | — |
| Expiry date | Dec 22, 2028 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG06T2207/20016
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
A system for enhancing a digital image. The system includes: means for providing a digital image; means for decomposing the provided digital image into a multi-frequency band representation of four frequency bands as follows: a lowest frequency band image which represents large-sized features in the digital image; a low-to-mid frequency band image which represents mid-sized features of the digital image; a mid-to-high frequency band image which represents the small-sized features in the digital image; and a highest frequency band which represents very fine detail in the digital image; means for manipulating said low-to-mid frequency band image to produce a contrast effect without affecting the overall dynamic range of said digital image; means for multiplying each of said high-frequency band images with a gain factor; means for summing together said unmodified low frequency band image and said modified high-frequency band images to produce a reconstructed digital image; and means for mapping said reconstructed digital image through a tone-scale look-up table to map said reconstructed digital image to optical densities.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.