Defect concealing image sensing device

Details Defect concealing image sensing device Defect concealing image sensing device

1983-11-29

1986-05-13

Rubinson, Gene Z.

Facsimile and static presentation processing

Facsimile

Recording apparatus

H04N 314

Patent

active

045890285

ABSTRACT:
A method for concealing defects in a video output signal from a photosensor array and an image sensing device operating in accordance with such a method in which positions of output lines from the array having an associated defect are marked by blowing respective fuses. Prior to scanning the normal photosensitive elements of the array, a line of dummy photosensing elements is activated and the resulting data patterns stored in a shift register. Subsequently, while the active photosensing elements are being read out, the shift register is operated to circulate the data stored therein. The output of the shift register is used to control connections to a video output terminal. Specifically, in the case that the respective output line from the array has no associated defect, the then-present output from the array is applied to the video output terminal, and in the case that the respective output line has an associated defect, the output from an adjacent line is applied to the video output terminal. Defects in the video output are thereby concealed.

REFERENCES:
patent: 3676590 (1972-06-01), Weimer
patent: 3959047 (1976-05-01), Alberts et al.
patent: 4250570 (1981-02-01), Tsang et al.
patent: 4400734 (1983-08-01), Davy

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