Modified automatic regressive filter and filtering method theref

Details Modified automatic regressive filter and filtering method theref Modified automatic regressive filter and filtering method theref

1997-06-23

1999-09-07

Lee, Thomas D.

Image analysis

Image enhancement or restoration

Image filter

382168, 382173, 348607, G06K 940, H04N 521

Patent

active

059499168

ABSTRACT:
A filtering method and a modified automatic regressive filter therefor are provided. The modified automatic regressive filter includes: a frame memory for storing one frame of the output of the filter; a frame difference generating portion for receiving the signal stored in the frame memory and an observed signal, to output a frame difference, and determining whether the current pixel belongs to a non-moving region or a moving region to output a moving index; a histogram generator for converting the frame difference of the non-moving region into a cumulative distribution function required for calculating the variance of noise in the non-moving region of the observed signal; and a selective filter output portion for selectively outputting the observed signal unaltered in the moving region and the signal passed via an adaptive filter having the gain calculated based on the output data of the histogram generator in the nonmoving region. Thus, a continuous moving signal is processed in real-time with high noise removing capability, and the edge of the moving target is preserved without being blurred.

REFERENCES:
patent: 4350998 (1982-09-01), Verhoeven
patent: 5237413 (1993-08-01), Israelsen et al.
patent: 5592226 (1997-01-01), Lee et al.
patent: 5764307 (1998-06-01), Ozcelik et al.

Affiliated with

Also associated with

Rating

Modified automatic regressive filter and filtering method theref does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Modified automatic regressive filter and filtering method theref, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modified automatic regressive filter and filtering method theref will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1812589