Digital imaging control with selective intensity resolution enhancement
US6788340B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 30, 1999 |
| Grant date | Sep 7, 2004 |
| Priority date | — |
| Expiry date | Dec 30, 2019 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N25/69
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
Image enhancement is automatically achieved by calibrating the reference voltage and gain of a differential amplifier and the integration interval so as to provide an input to a differential analog to digital converter (ADC) that utilizes the full dynamic range of the ADC. When used with a CMOS array, the imaging logic can be fabricated on a single chip with the array using combinational logic for fast, inexpensive calibration. Another advantageous feature is the ability to expand a desired portion of the luminance spectrum of the image in order to increase the digital resolution of the resulting image for that portion of the spectrum of interest.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.