| US 7,590,305 B2 | ||
| Digital camera with built-in lens calibration table | ||
| Eran Steinberg, San Francisco, Calif. (US); Yury Prilutsky, San Mateo, Calif. (US); Peter Corcoran, Clargalway (Ireland); Adrian Zamfir, Bucuresti (Romania); and Petronel Bigioi, Galway (Ireland) | ||
| Assigned to FotoNation Vision Limited, Galway (Ireland) | ||
| Filed on May 10, 2004, as Appl. No. 10/842,244. | ||
| Application 10/842244 is a continuation in part of application No. 10/676820, filed on Sep. 30, 2003. | ||
| Prior Publication US 2005/0068452 A1, Mar. 31, 2005 | ||
| This patent is subject to a terminal disclaimer. | ||
| Int. Cl. H04N 5/225 (2006.01) | ||
| U.S. Cl. 382—275 [348/335] | 22 Claims |
| 1. A digital camera that automatically corrects dust artifact regions within acquired images, comprising:
(a) an optical system for acquiring an image including a lens assembly and an aperture stop;
(b) an electronic sensor array for collecting image data with multiple pixels that collectively correspond to the acquired
image;
(c) a lens calibration table corresponding to said optical system that includes information describing dust location and appearance
as a function of optical parameters at least including exit pupil dimension of the lens assembly, or distance of dust from
a surface of the electronic sensor array that corresponds to a focal plane of the lens assembly, or both;
(d) a master dust map describing a physical manifestation of dust artifacts on said sensor array;
(e) a manifestation of the master dust map for a specific lens and focal length, calculated as a transformation of the master
dust map based on the lens calibration table; and
(f) digital processing electronics including a processor for converting processing the digital data according to programming
instructions; and
(g) wherein said dust artifacts are corrected for said acquired image based on the manifestation of the master dust map.
|