公开(公告)号：US3662341A

公开(公告)日：1972-05-09

申请号：US3662341D

申请日：1970-09-25

Applicant: IBM

Inventor： BAUMGARTNER RICHARD J ,  LOVGREN JEFFREY L ,  MCCULLOUGH JOHN W

IPC: G06K9/34 ,  G06K9/04

CPC classification number: G06K9/34 ,  G06K2209/01

Abstract: A method and apparatus for gating segmentation scheme generators in accordance with a detected video signal. A video operator signal derived from detected video signals is compared with a threshold signal. One of a plurality of segmentation scheme generators is gated on in accordance with the comparison of the video operator signal and the threshold signal.

Abstract translation: 一种根据检测到的视频信号门控分割方案生成器的方法和装置。 将从检测到的视频信号导出的视频操作者信号与阈值信号进行比较。 根据视频操作者信号和阈值信号的比较，门控多个分割方案生成器之一。

公开(公告)号：DE3485009D1

公开(公告)日：1991-10-10

申请号：DE3485009

申请日：1984-11-09

Applicant: IBM

Inventor： BHEND RICHARD B ,  KEILLOR ROBERT D ,  LOVGREN JEFFREY L ,  MERCER JOHN R ,  GAEBELEIN GEORG N

IPC: H04N1/04 ,  H04N1/047 ,  H04N1/12 ,  H04N1/17 ,  H04N1/193 ,  H04N1/36

Abstract: Scanning apparatus for generating data representing images on a document (10) includes a solid state time integrating photodetector array (12) and means for cycling the array to generate data signals representing the images, a document transport system (22, 30) for relatively moving the array and the document (10) to optically present successive images to said array and a synchronisation device (40) for handling the data. The synchronisation device comprises means (24, 26, 28) responsive to movement of the document relative to the array for producing an enabling pulse signal each time the document has moved a predetermined amount with respect to the array, means (103, 105) for producing clock pulse signals to cycle the linear array, and logic means (121, 123, 125) responsive to the enabling pulse signals and the clock pulse signals for gating out for further processing only those data signals generated by the array upon the occurrence of a predetermined relationship between the times of occurrence of one of the enabling pulse signals and one of the clock pulse signals.

公开(公告)号：CA1216929A

公开(公告)日：1987-01-20

申请号：CA464022

申请日：1984-09-26

Applicant: IBM

Inventor： BHEND RICHARD B ,  KEILLOR ROBERT D ,  LOVGREN JEFFREY L ,  MERCER JOHN R ,  GAEBELEIN GEORG N

IPC: H04N1/04 ,  H04N1/047 ,  H04N1/12 ,  H04N1/17 ,  H04N1/193 ,  H04N1/36

Abstract: A variable time integrating period to accomplish distortion free synchronization of the scanning rate to the document transport speed when the transport speed is within a predetermined tolerance with respect to it's nominal speed is disclosed. The data levels provided by the scanner are then multiplied by an appropriate correction factor to compensate for the varied amount of light accumulated by the time integrating photo sensor array because of the varied integration time. When the document speed must be reduced to a value less than the predetermined tolerance, the system of the invention resorts to the technique of selecting only certain scans and discarding the data from other scans. Scan selection is found to be economically accomplished by selecting those scans which were time integrating when an emitter pulse occurred.

公开(公告)号：FR2401482A1

公开(公告)日：1979-03-23

申请号：FR7819406

申请日：1978-06-20

Applicant: IBM

Inventor： CASTRODALE DANIEL O ,  LOVGREN JEFFREY L ,  RUSSEL RALPH A ,  SHIDLER KARL A

IPC: G11B5/02 ,  G11B5/17 ,  G11B5/265 ,  G11B5/27