Agfa Gevaert Nv

Afga-gevaert Nv

Patrick M Pandelaers

Jean A Van Daele

Dirk L Costrop

Frank C Trouillard

In an imaging system having at least two optically butted CCD sensors disposed in angular relation to each other and onto which light images are projected by means of a light beam splitter, the correct spacial position of the sensors is determined providing the beam splitter with mounting surfaces on which the respective sensors are mounted and the sensors with lateral surfaces, and utilizing mounting members for the opposite ends of each sensor, each mounting member having a base surface and a supporting surface extending in true rectangular fashion thereon. The base surface of each mounting member is adhesively bonded to one of the mounting surfaces of the beam splitter and its supporting surface is adhesively bonded to a lateral surface of a sensor, such bonding being effected after each sensor has been correctly aligned.

Optically butted electro-optical components

A method and an apparatus for generating correcting signals for correcting the video output signal of an electro-optical document reading apparatus of the line-wise scanning type are disclosed. The method of the invention employs a successive approximation procedure for determining the correcting factors pertaining to pixels within each scanning line, the checking cycles of the procedures corresponding with each correction word however are nested.

Video output signal correcting method and apparatus

A signal-processing device for transforming a digital image signal, that has been obtained by sampling and digitization of a video signal obtained by line-wise scanning of an original, to a binary image signal wherein zero points of the two-dimensional second difference of the digital video signal are determined in order to detect contrast transitions in the original. Unwanted noise components in the video signal are eliminated by masking the second-difference signal.

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Brussels, Belgium

Patrick M Pandelaers