Noise eliminator

Details Noise eliminator Noise eliminator

2011-04-12

2011-04-12

Aggarwal, Yogesh K (Department: 2622)

Television

Camera, system and detail

Combined image signal generator and general image signal...

C348S243000, C348S246000, C348S247000

Reexamination Certificate

active

07924329

ABSTRACT:
A noise eliminator is provided which can highly compress and store dark current noise components while maintaining characteristics, including many high frequency components. A noise distribution analysis section10determines the magnitude distribution of dark current noise components of at least some pixels, and then computes the threshold and typical values for quantization based on this distribution. A quantization section12quantizes the dark current noise components based on the computed threshold value, and a memory14stores the quantized dark current noise components. An inverse quantization section16inversely quantizes the quantized dark current noise components stored in the memory14with reference to the typical value computed by the noise distribution analysis section10. The inversely quantized dark current noise components are supplied to a subtraction section18, and the subtraction section18subtracts the inversely quantized dark current noise components from an image signal.

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patent: PCT/JP2005/019138 (2007-04-01), None

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