Method and a device for processing electric signals coming from

Details Method and a device for processing electric signals coming from Method and a device for processing electric signals coming from

1989-05-18

1991-06-11

Razavi, Michael

Image analysis

Histogram processing

For setting a threshold

382 67, 382 68, 358213, 35821328, G06K 700, G06K 920, H04N 314, H04N 5355

Patent

active

050239210

ABSTRACT:
The invention relates to a method and a device for processing an electric signal constituting the analysis of a line of an image and issued by linear detectors such as a strip (20) of adjacent photodetectors (such as 7, 8) which realize a sampling at a constant pitch. According to the invention, k analyses of the same line are carried out with respective lateral shifts of 1/k of the pitch of the photodetectors, an oversampled signal is generated by multiplexing the k samples, and the oversampled signal is submitted to a filtering inverse to the filtering inherent to the spatial smoothing. Thus, the degradation of the signal due to the folding of the spectrum and to the filtering inherent to the integration of the "light" on the photosensible surface of the photodetectors is reduced.

REFERENCES:
patent: 3697760 (1972-10-01), Biet et al.
patent: 4092632 (1978-05-01), Aqulnek
patent: 4147928 (1979-04-01), Crean et al.
patent: 4465939 (1984-08-01), Tamura
patent: 4467365 (1984-08-01), Murayama et al.
patent: 4712134 (1987-12-01), Murakami
patent: 4765564 (1988-08-01), Colvocoresses
patent: 4910401 (1990-03-01), Woods
patent: 4913539 (1990-04-01), Lewis
Patent Abstracts of Japan, vol. 6, No. 77 (E-106) [455], May 14, 1982, JP-A-57-14-250 (Canon K. K.), 25-01-1982.

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