Abstract: An image pickup apparatus includes the following units. An image pickup unit captures an image and outputs an analog image signal. A conversion unit converts the analog image signal into a digital image signal. A synchronization signal generation unit generates a synchronization signal to be supplied to the image pickup unit and the conversion unit, and supplies the synchronization signal to the image pickup unit. An adjustment unit adjusts the timing at which the synchronization signal generated by the synchronization signal generation unit is supplied to the conversion unit, and supplies the synchronization signal to the conversion unit. The adjustment unit is disposed in a position such that the adjustment unit is affected by the self-heating of the image pickup unit.

Abstract: When an auto document feeder feeds an original to an original image reading platen, a CCD line sensor reads the original along the main scanning direction perpendicular to the feeding direction of the original. A string detection circuit detects a streak parallel to the feeding direction in the image. A string correction circuit corrects the detected streak. In particular, for a predetermined number of sub-scanning positions that are located in the same main scanning position as the main scanning position at which the streak has been detected by the string detection circuit and that exist subsequent to the sub-scanning position at which the streak has been detected, correction is performed by the string correction circuit even when no streak is detected by the string detection circuit.

Abstract: An image pickup apparatus includes the following units. An image pickup unit captures an image and outputs an analog image signal. A conversion unit converts the analog image signal into a digital image signal. A synchronization signal generation unit generates a synchronization signal to be supplied to the image pickup unit and the conversion unit, and supplies the synchronization signal to the image pickup unit. An adjustment unit adjusts the timing at which the synchronization signal generated by the synchronization signal generation unit is supplied to the conversion unit, and supplies the synchronization signal to the conversion unit. The adjustment unit is disposed in a position such that the adjustment unit is affected by the self-heating of the image pickup unit.

Abstract: There is disclosed a proof-printing machine comprising an elongated table for mounting a printing plate thereon detachably which is supported by a base frame, a carriage means being movable along the table in the longitudinal direction hereof, a head means being mounted on the carriage means, a doctor blade means for applying ink onto the printing plate so supported by the head means as to be adjustable of its angle and contact pressure against the printing plate, a cylindrical press drum being supported by the head means so as to be rotatable about the axis thereof and adjustable of its contact pressure against the printing plate onto the peripheral surface of which a blank material to be printed is fixed, a pair of timing belt means for transferring the carriage each of which is spanned between a pair of pulleys provided at each end portion of the side wall of the table respectively, a pulse motor for driving said timing belt means, and control means for driving the pulse motor according to a predetermined