CA1207373A - Commande de niveau d'exposition dynamique pour tube cathodique source de lumiere - Google Patents

Commande de niveau d'exposition dynamique pour tube cathodique source de lumiere

Info

Publication number
CA1207373A
CA1207373A CA000445041A CA445041A CA1207373A CA 1207373 A CA1207373 A CA 1207373A CA 000445041 A CA000445041 A CA 000445041A CA 445041 A CA445041 A CA 445041A CA 1207373 A CA1207373 A CA 1207373A
Authority
CA
Canada
Prior art keywords
exposure
control means
prescan
density
contrast
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired
Application number
CA000445041A
Other languages
English (en)
Inventor
Walter L. Mcintosh
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Logetronics Inc
Original Assignee
Logetronics Inc
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority claimed from US06/270,758 external-priority patent/US4344699A/en
Application filed by Logetronics Inc filed Critical Logetronics Inc
Priority to CA000445041A priority Critical patent/CA1207373A/fr
Application granted granted Critical
Publication of CA1207373A publication Critical patent/CA1207373A/fr
Expired legal-status Critical Current

Links

Landscapes

  • Projection-Type Copiers In General (AREA)
CA000445041A 1981-06-05 1984-01-10 Commande de niveau d'exposition dynamique pour tube cathodique source de lumiere Expired CA1207373A (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CA000445041A CA1207373A (fr) 1981-06-05 1984-01-10 Commande de niveau d'exposition dynamique pour tube cathodique source de lumiere

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
US270,758 1981-06-05
US06/270,758 US4344699A (en) 1981-06-05 1981-06-05 Exposure and contrast determination by prescanning in electronic photoprinting systems
CA000392563A CA1177411A (fr) 1981-06-05 1981-12-17 Dispositif de controle du niveau d'exposition et de la correction du contraste par balayage preliminaire pour systemes de reprographie electronique
CA000445041A CA1207373A (fr) 1981-06-05 1984-01-10 Commande de niveau d'exposition dynamique pour tube cathodique source de lumiere

Related Parent Applications (1)

Application Number Title Priority Date Filing Date
CA000392563A Division CA1177411A (fr) 1981-06-05 1981-12-17 Dispositif de controle du niveau d'exposition et de la correction du contraste par balayage preliminaire pour systemes de reprographie electronique

Publications (1)

Publication Number Publication Date
CA1207373A true CA1207373A (fr) 1986-07-08

Family

ID=25669512

Family Applications (2)

Application Number Title Priority Date Filing Date
CA000445041A Expired CA1207373A (fr) 1981-06-05 1984-01-10 Commande de niveau d'exposition dynamique pour tube cathodique source de lumiere
CA000445042A Expired CA1207374A (fr) 1981-06-05 1984-01-10 Dispositif d'impression photgraphique par contact

Family Applications After (1)

Application Number Title Priority Date Filing Date
CA000445042A Expired CA1207374A (fr) 1981-06-05 1984-01-10 Dispositif d'impression photgraphique par contact

Country Status (1)

Country Link
CA (2) CA1207373A (fr)

Also Published As

Publication number Publication date
CA1207374A (fr) 1986-07-08

Similar Documents

Publication Publication Date Title
US4344699A (en) Exposure and contrast determination by prescanning in electronic photoprinting systems
US4394089A (en) Color photoprinting with a scanning memory mask
US4265532A (en) Photo printing by intensity and velocity modulation
US5528339A (en) Color image reproduction of scenes with color enhancement and preferential tone mapping
US3790275A (en) Method and apparatus for sensing radiation derived from information bearing media
EP0221131B1 (fr) Procede de traitement d'images numeriques bimodales
EP0221133B1 (fr) Procede pour detecter et imprimer des images photographiques en couleur exposees par un agent eclairant a bande spectrale etroite
US4168121A (en) Automatic snow/beach correction for photographic printer
US3400632A (en) Method of photographic reproduction and apparatus therefor
EP0221111B1 (fr) Procede de correction des couleurs d'images numeriques
US5703700A (en) Method of enhancing a print of a transparency
US3455632A (en) Method of classifying photographic material
JPH0616152B2 (ja) カラーネガ原板からカラープリントを作成するための方法
US3041932A (en) Photographic colour reproduction apparatus
JPH02118642A (ja) 写真的に作られたマスクを使用する乾式ドツトエツチングによる色修正方法
CA1230291A (fr) Analyse automatique des couleurs basee sur le rapport minimum/maximum du niveau video
CA1207373A (fr) Commande de niveau d'exposition dynamique pour tube cathodique source de lumiere
US5003381A (en) Method and apparatus for point-by-point reproduction of an original
US2921512A (en) Photographic printing
US2968214A (en) Modification of the light response from a coloured original
US2985086A (en) Photographic printing
US3668311A (en) Method and system for simulating halftones
US3019703A (en) Photographic colour reproduction apparatus
JPS5910943A (ja) カラ−写真焼付装置
US5081486A (en) Process for the preparation of photographic color copies from copy masters

Legal Events

Date Code Title Description
MKEX Expiry