Picture data reading device
AssigneeFuji Xerox Co., Ltd.
InventorsTadashi Yamamoto, Masami Kurata
Life of this patent
Estimating the term…
Abstract
A data reading device of the type employing a plurality of image sensors for reading separated colors is provided with a delay device in the processing circuitry of at least one of the image sensors. The delay device can be set to delay the signal output from the associated image sensor to an arithmetic circuit for a variable time corresponding to a multiple of the line scanning period. In this manner, the image sensors need not be so accurately positioned that the same line is read by each of the several sensors at the same time, but the picture data signals for the same line can nonetheless be fed to the arithmetic circuit simultaneously.
Claims7
A picture data reading device, comprising:
- an optical system for scanning an original line by line and for forming the image of picture data of a scanned position at a plurality of positions;
- one-dimensional image sensors respectively arranged at the image forming surfaces of said optical system, for subjecting picture data to photo-electric conversion for each line;
- means for binary-encoding picture signals outputted by said one-dimensional image sensors;
- and
- delay means for receiving, from among said picture signals thus binary-encoded, a picture signal other than one which is latest in reading in an auxiliary scanning direction, and for delaying said picture signal thus received by a time corresponding to the number of lines corresponding to a reading position difference between said picture signal and said latest picture signal.
A picture data reading device, comprising;
- an optical system for scanning an original line by line and for forming the image of picture data of a scanned position at a plurality of positions;
- one-dimensional image sensors respectively arranged at the image forming surfaces of said optical system, for subjecting picture data to photo-electric conversion for each line;
- means for binary-encoding picture signals outputted by said one-dimensional image sensors;
- and delay means for receiving, from among said picture signals thus binary-encoded, a picture signal other than one which is latest in reading in an auxiliary scanning direction, and for delaying said picture signal thus received by a time corresponding to the number of lines corresponding to a reading position difference between said picture signal and said latest picture signal, said delay means comprising a plurality of shift registers connected in series, outputs of said shift registers being provided to subsequent of said shift registers and to respective output lines,
- switch means receiving a plurality of inputs corresponding to said respective output lines and a direct line from one of said binary-encoding means, for selectively outputting the output of a selected one of said shift registers or that of said one binary-encoding means.
A picture data reading device, comprising;
- an optical system for scanning an original line by line and for forming the image of picture data of a scanned position at a plurality of positions;
- one-dimensional image sensors respectively arranged at the image forming surface of said optical system, for subjecting picture data to photo-electric conversion for each line;
- means for binary-encoding picture signals outputted by said one-dimensional image sensors;
- and
- delay means for receiving, from among said picture signals thus binary-encoded, a picture signal other than one which is latest in reading in an auxiliary scanning direction, and for delaying said picture signal thus received by a time corresponding to the number of lines corresponding to a reading position difference between said picture signal and said latest picture signal, wherein a pair of said image sensors are provided, and said delay means is inserted between the binary-encoding means associated with one of said image sensors and a following arithmetic circuit, said arithmetic circuit also receiving an output from the binary-encoding means associated with the other of said image sensors.
Dependencies are inferred from the claim text.