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Class Information
Number: 348/615
Name: Television > Image signal processing circuitry specific to television > Noise or undesired signal reduction > Blackspot or shading correction (e.g., corrects for fixed pattern defects)
Description: Subject matter including apparatus to compensate for the variations in brightness level over different areas of a given reproduced picture due to unequal characteristics of, or imperfections in, an image signal generator.
Patents under this class:
| Patent Number |
Title Of Patent |
Date Issued |
| 7567724 |
Image processing apparatus, image processing method, program of image processing method, and recording medium in which program of image processing method has been recorded |
Jul. 28, 2009 |
| 7508430 |
Method for locally reducing row noise |
Mar. 24, 2009 |
| 7450181 |
Bit-depth extension with models of equivalent input visual noise |
Nov. 11, 2008 |
| 7327384 |
Gamut false color display |
Feb. 5, 2008 |
| 7294817 |
System and methods for determining nonuniformity correction parameters in detector-array imaging |
Nov. 13, 2007 |
| 7215383 |
Coherent light despeckling |
May. 8, 2007 |
| 7209180 |
Video output device |
Apr. 24, 2007 |
| 7202894 |
Method and apparatus for real time identification and correction of pixel defects for image sensor arrays |
Apr. 10, 2007 |
| 7184098 |
Cyclic data signal averaging system and method for use in video display systems |
Feb. 27, 2007 |
| 7148933 |
Projector having alignment optics and electronics |
Dec. 12, 2006 |
| 7084911 |
Black level calibration method for imager with hysteresis comparison and adaptive step size |
Aug. 1, 2006 |
| 7075569 |
Image processing apparatus for performing shading correction on synthesized images |
Jul. 11, 2006 |
| 6963373 |
Image processing apparatus which reduces noise by adjusting the transition timing |
Nov. 8, 2005 |
| 6958785 |
Method and apparatus for determining and correcting for illumination variations in a digital projector |
Oct. 25, 2005 |
| 6859493 |
Apparatus and method for the recovery of compression constants in the encoded domain |
Feb. 22, 2005 |
| RE38574 |
Method and apparatus for reducing visibility of damping wires in aperture grill display tubes |
Aug. 31, 2004 |
| 6768518 |
Method and apparatus for removing a checkerboard-like noise artifact from a captured composite NTSC video frame |
Jul. 27, 2004 |
| 6741666 |
Device and method for transforming a digital signal |
May. 25, 2004 |
| 6737625 |
Bad pixel detection and correction in an image sensing device |
May. 18, 2004 |
| 6650372 |
Dynamic change of flicker filter |
Nov. 18, 2003 |
| 6559895 |
Analog memory and image processing system for reducing fixed pattern noise |
May. 6, 2003 |
| 6535617 |
Removal of fixed pattern noise and other fixed patterns from media signals |
Mar. 18, 2003 |
| 6493039 |
Method and apparatus for white noise reduction in video images |
Dec. 10, 2002 |
| 6490008 |
Method for removing a checkerboard-like noise artifact from a captured composite NTSC video frame |
Dec. 3, 2002 |
| 6466273 |
Analog FIFO memory device |
Oct. 15, 2002 |
| 6456337 |
Moving image correcting circuit for display device |
Sep. 24, 2002 |
| 6441867 |
Bit-depth extension of digital displays using noise |
Aug. 27, 2002 |
| 6363118 |
Apparatus and method for the recovery of compression constants in the encoded domain |
Mar. 26, 2002 |
| 6359662 |
Method and system for compensating for defects in a multi-light valve display system |
Mar. 19, 2002 |
| 6310660 |
Video signal dropout detector |
Oct. 30, 2001 |
| 6233019 |
Image converter and image converting method for improving image quality |
May. 15, 2001 |
| 6166782 |
Method and apparatus for reducing visibility of damping wires in aperture grill display tubes |
Dec. 26, 2000 |
| 6034724 |
Imaging device utilizing a line-crawling correction coefficient |
Mar. 7, 2000 |
| 5969709 |
Field emission display driver |
Oct. 19, 1999 |
| 5959680 |
Method and apparatus for reducing flicker in the television display of network application data |
Sep. 28, 1999 |
| 5886750 |
Television receiver including shading correction without deteriorating S/N ratio |
Mar. 23, 1999 |
| 5805216 |
Defective pixel correction circuit |
Sep. 8, 1998 |
| 5751340 |
Method and apparatus for reducing the inherently dark grid pattern from the video display of images from fiber optic bundles |
May. 12, 1998 |
| 5748257 |
Picture information detecting apparatus for a video signal |
May. 5, 1998 |
| 5583578 |
Projection-type video display apparatus capable of correcting an asymmetrical brightness distribution |
Dec. 10, 1996 |
| 5576562 |
Solid-state imaging device |
Nov. 19, 1996 |
| 5534945 |
System and method for providing black diffusion in video image processing |
Jul. 9, 1996 |
| 5495298 |
Apparatus for concealing detected erroneous data in a digital image signal |
Feb. 27, 1996 |
| 5446501 |
Three-dimensional median and recursive filtering apparatus and method for video image enhancement |
Aug. 29, 1995 |
| 5430502 |
Apparatus for eliminating moire pattern effects resulting from the use of different display resolution with a fixed size shadow mask |
Jul. 4, 1995 |
| 5416516 |
Solid-state image pickup apparatus having a defect detecting mode |
May. 16, 1995 |
| 5412489 |
Shading correction having a line memory read which generates an average reference level from a plurality of lines of a reference plate |
May. 2, 1995 |
| 5410365 |
Video camera with coarse analog and fine digital black level adjustment |
Apr. 25, 1995 |
| 5343302 |
Video camera with improved shading correction using clipped parabolic wave signal |
Aug. 30, 1994 |
| 5337088 |
Method of correcting an image signal decoded in block units |
Aug. 9, 1994 |
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