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1. WO1991000673 - A TECHNIQUE FOR SCANNING A MICROFILM IMAGE MOVING AT A VARIABLE SPEED

Publication Number WO/1991/000673
Publication Date 10.01.1991
International Application No. PCT/US1990/003649
International Filing Date 26.06.1990
Chapter 2 Demand Filed 14.01.1991
IPC
G03B 21/11 2006.01
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
21Projectors or projection-type viewers; Accessories therefor
10Projectors with built-in or built-on screen
11for microfilm reading
G03B 27/32 2006.01
GPHYSICS
03PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
BAPPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
27Photographic printing apparatus
32Projection printing apparatus, e.g. enlarger, copying camera
G06F 17/30 2006.01
GPHYSICS
06COMPUTING; CALCULATING OR COUNTING
FELECTRIC DIGITAL DATA PROCESSING
17Digital computing or data processing equipment or methods, specially adapted for specific functions
30Information retrieval; Database structures therefor
H04N 1/028 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
1Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
024Details of scanning heads
028for picture-information pick-up
H04N 1/19 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
1Scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission; Details thereof
04Scanning arrangements
19using multi-element arrays
H04N 5/253 2006.01
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
222Studio circuitry; Studio devices; Studio equipment
253Picture signal generating by scanning motion picture films or slide opaques, e.g. for telecine
CPC
H04N 5/253
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
222Studio circuitry; Studio devices; Studio equipment ; ; Cameras comprising an electronic image sensor, e.g. digital cameras, video cameras, TV cameras, video cameras, camcorders, webcams, camera modules for embedding in other devices, e.g. mobile phones, computers or vehicles
253Picture signal generating by scanning motion picture films or slide opaques, e.g. for telecine
H04N 5/335
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
5Details of television systems
30Transforming light or analogous information into electric information
335using solid-state image sensors [SSIS]
H04N 7/18
HELECTRICITY
04ELECTRIC COMMUNICATION TECHNIQUE
NPICTORIAL COMMUNICATION, e.g. TELEVISION
7Television systems
18Closed circuit television systems, i.e. systems in which the signal is not broadcast
Applicants
  • EASTMAN KODAK COMPANY [US/US]; 343 State Street Rochester, NY 14650-2201, US
Inventors
  • MORTON, Roger, Roy, Adams; US
Agents
  • ARNDT, Dennis, R.; 343 State Street Rochester, NY 14650-2201, US
Priority Data
373,84526.06.1989US
Publication Language English (EN)
Filing Language English (EN)
Designated States
Title
(EN) A TECHNIQUE FOR SCANNING A MICROFILM IMAGE MOVING AT A VARIABLE SPEED
(FR) TECHNIQUE DE BALAYAGE D'UNE IMAGE DE MICROFILM A VITESSE VARIABLE
Abstract
(EN)
A technique, particularly for use in an image retrieval or image management system, for scanning a succession of microfilm images that moves within a film transport mechanism at a variable user adjusted speed in order to implement an effective 'search' mode of operation. Specifically, this technique relies on operating a CCD scanner at a constant clock rate, e.g. its maximum clock rate, while individual lines in a microfilm image are moving in front of the scanner at a rate that is faster than the integration time of the scanner. As such, the scanner generates a succession of composite lines of pixel data in which each pixel in such a line represents an average value of a corresponding group of vertically adjacent full resolution line spacings situated across an area of the microfilm image, where the number of line spacings in the area equals the value of a ratio of the user controlled speed of the microfilm to the speed of the microfilm when scanned at full resolution. Each composite line of data is then replicated a number of times typically equal to the number of full resolution line spacings in the scanned area associated therewith in order to form an associated group of identical lines of pixel data which, in turn, is stored in successive lines in a frame store memory. The entire contents of the frame store memory are read in succession and applied to a video display terminal to provide a subsequent full size display of the scanned image.
(FR)
Technique, utile en particulier dans un système d'extraction d'images ou de gestion d'images, permettant de balayer une série d'images de microfilm se déplaçant dans un mécanisme de transport de film à une vitesse variable réglée par l'utilisateur, de manière à effectuer une mode opératoire de 'recherche' efficace. Plus particulièrement, ladite technique fait appel à un balayage CCD fonctionnant à une fréquence d'horloge constante, par exemple, à sa fréquence maximale, tandis que des lignes individuelles disposées dans une image de microfilm se déplacent devant ledit balayeur à une fréquence supérieure au temps d'intégration de balayage. Le scanner produit, de cette manière, une série de lignes composites de données de pixels, chaque pixel d'une telle ligne représentant une moyenne d'un groupe correspondant d'espacements de lignes à résolution totale verticalement adjacentes et situées sur une zone de l'image de microfilm. Le nombre d'espacements de lignes dans ladite zone est égal à la valeur d'un rapport entre la vitesse du microfilm réglée par l'utilisateur et la vitesse du microfilm lorsqu'il est balayé à résolution totale. Chaque ligne composite de données est ensuite répétée un certain nombre de fois, ledit nombre étant, typiquement, égal au nombre d'espacements de lignes à résolution totale diposés dans la zone balayée associée à ceux-ci de manière à créer un groupe associé de lignes identiques de données de pixels. Ce groupe est à son tour, emmagasiné dans une série de lignes située dans une mémoire d'images. Les éléments du contenu total de ladite mémoire d'images sont sortis successivement et envoyés à un terminal d'affichage vidéo de manière à réaliser ensuite une visualisation à grandeur nature de l'image balayée.
Also published as
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