Method and apparatus of correction image read signals by removin

Details Method and apparatus of correction image read signals by removin Method and apparatus of correction image read signals by removin

1992-06-23

1994-10-11

Razavi, Michael T.

Television

Camera, system and detail

Combined image signal generator and general image signal...

H04N 5335

Patent

active

053551648

ABSTRACT:
A method of correcting image read signals including the steps of reading an image line by line by a linear sensor; determining an average value when a plurality of lines of a plurality of blind pixels of the linear sensor are read, computing the signals read from the image by using the average value so as to correct an influence of a dark current of said linear sensor, and outputting said computed signal as the image read signal. According to the present invention, the dark current can be accurately obtained according to the read state without being affected by errors in measurement due to the variations in each of the one-line pixels or due to noise.

REFERENCES:
patent: 4293877 (1981-10-01), Tsunekawa et al.
patent: 4558366 (1985-12-01), Nagumo
patent: 5132801 (1992-07-01), Yamano
patent: 5153421 (1992-10-01), Tandon et al.

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