Method of identifying defective pixels in digital images, and me

Details Method of identifying defective pixels in digital images, and me Method of identifying defective pixels in digital images, and me

1997-09-05

1999-11-09

Rogers, Scott

Image analysis

Image enhancement or restoration

Variable threshold, gain, or slice level

382275, 382205, G06K 940, G06K 946, G06T 500

Patent

active

059829460

ABSTRACT:
A method of identifying defective pixels included in a digital image. The method includes the steps of designating a pixel adjacent the defective pixels in the digital image, setting an evaluation area, setting a defective pixel candidate, computing, as a line average, an average pixel value of each of lines above, below, leftward and rightward of the defective pixel candidate, diminishing the evaluation area by selecting an upper line, a lower line, a left line and a right line, computing a threshold pixel value for determining the defective pixels, from an average pixel value of each line, and comparing values of all pixels with the threshold pixel value to determine the defective pixels.

REFERENCES:
patent: 5365604 (1994-11-01), Kwok et al.
patent: 5598226 (1997-01-01), Kokaram
patent: 5623558 (1997-04-01), Billawala et al.
patent: 5805216 (1995-05-01), Tabei et al.

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