Companding algorithm to transform an image to a lower bit resolu

Details Companding algorithm to transform an image to a lower bit resolu Companding algorithm to transform an image to a lower bit resolu

1997-09-30

1999-12-28

Rogers, Scott

Image analysis

Image compression or coding

Quantization

382168, 382271, 358429, 358455, 358466, 348222, 348231, G06K 938, G06T 900, G06T 540, H04N 141

Patent

active

060092068

ABSTRACT:
What is disclosed is a mapping circuit configured to map a range of captured intensity values to a companded intensity level based upon the density of captured intensity values present in the captured image. Also provided is a companding circuit coupled to the mapping circuit, the companding circuit configured to replace each pixel of the captured image with a corresponding mapped intensity value pixel. The companding circuit and mapping circuit are configured to preserve image characteristics.

REFERENCES:
patent: 4326258 (1982-04-01), De La Guardia
patent: 4493106 (1985-01-01), Farhangi et al.
patent: 4922340 (1990-05-01), Iwai
patent: 5680477 (1997-10-01), Asada
patent: 5715378 (1998-02-01), Fujimoto et al.

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