Method for correcting images obtained by an array of photosensitive points
US8780246B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Dec 9, 2009 |
| Grant date | Jul 15, 2014 |
| Priority date | — |
| Expiry date | Nov 3, 2030 |
Classification
- Technology area (CPC H)Electricity
- CPC primaryH04N23/30
- WIPO fieldAudio-visual technology
- WIPO sectorElectrical engineering
Abstract
A method for correcting an image obtained by a matrix of photosensitive points finds particular utility when the matrix is subjected to an electromagnetic disturbance. The method of correction comprises a first step of row-by-row reading of the matrix. The signals read during a first reading of each row represent the charges accumulated subsequent to exposure of the matrix to luminous radiation and make it possible to form, for each column of the matrix, a discrete signal. The signals read during a second reading represent the charges accumulated in the absence of exposure and form, for each column of the matrix, a discrete signal. In a second step of the method, a signal corresponding substantially to the signal which would have been formed at the time of the first reading in the absence of exposure is determined. In a third step, the signal is subtracted column by column from the signal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.