Method for detecting/processing image information

• US 4,837,711 A
• Filed: 04/21/1986
• Issued: 06/06/1989
• Est. Priority Date: 04/20/1985
• Status: Expired due to Term

• Current Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Original Assignee: Fuji Photo Film Co Limited (Fujifilm Holdings Corporation)
• Inventors: Suzuki, Kenji
• Primary Examiner(s): Harkcom, Gary V.
• Assistant Examiner(s): Zimmerman, Mark K.
• Application Number:
  US06/854,560
• Time in Patent Office: 1,142 Days
• Field of Search: 382/30, 382/45, 382/46, 382/48, 382/23, 355/35, 355/38, 355/55, 355/56, 364/523, 364/559, 378/99, 378/100, 358/288
• US Class Current: 358/1.1
• CPC Class Codes: G03B 27/735 in dependence upon automatic analysis of the original

Abstract

In photographic printing systems, it is necessary to detect image information of an original film to determine printing exposure amount for optimum prints. When an image sensor is used as a detector or for detecting image information, the detection area in the image sensor should correspond exactly with the detected area on the film. Particularly, when images are measured by separation into three colors of RGB (Red, Green, Blue), color registration among RGB should be attained. Image information can be automatically and accurately detected and processed without needing mechanical positional adjustment of the image sensor(s).

Claims

1. A method for detecting/processing image information comprising the steps of:

receiving light from images with an image sensor;

digitally detecting, on a pixel by pixel basis, image information data of an entire area through which said image sensor receives light;

storing said information data in a memory;

processing said stored information data, wherein memory addresses of tables containing said information data are made to correspond with sensor coordinates of said image sensor;

photometrically measuring a reference film negative having a mark at a frame reference position;

calculating the amount of deviation between (a) a sensor coordinate which corresponds to said frame reference position, and (b) a reference coordinate of said sensor;

calculating values of frame coordinates corresponding to each pixel point of said sensor coordinates;

writing said values in said data information tables;

photometrically measuring said images and storing information corresponding thereto in said memory; and

simultaneously,

processing said image information in accordance with said memory addresses of said frame coordinates obtained by referring to said data information tables;

wherein said images and said image sensor are fixed, and reading out area of said memory is operatively variable.

2. A method for detecting/processing image information as claimed in claim 1, wherein said frame reference position is set at one point and said deviation in the longitudinal and lateral directions is corrected based on said set point.

3. A method for detecting/processing image information as claimed in claim 1, wherein two frame reference positions are set and said deviation in the longitudinal and lateral directions as well as inclination are corrected based on said two frame reference positions.

4. A method for detecting/processing image information as claimed in claim 1, wherein said frame reference position is automatically obtained by photometrically measuring an aperture of a film negative carrier.

5. A method for detecting/processing color image information comprising the steps of:

receiving light from images with an image sensor;

digitally detecting, on a pixel by pixel basis, image information data of an entire area through which said image sensor receives light;

storing said information data in a memory;

processing said stored information data, wherein memory addresses of tables containing said information data are made to correspond with sensor coordinates of said image sensor;

photometrically measuring a reference film negative having a mark at a frame reference position;

calculating the amount of deviation between (a) a sensor coordinate which corresponds to said frame reference position, and (b) a reference coordinate of said sensor;

calculating values of frame coordinates corresponding to each pixel point of said sensor coordinates;

writing said values in said data information tables;

photometrically measuring said images and storing information corresponding thereto in said memory; and

simultaneously,

processing said image information in accordance with said memory addresses of said frame coordinates obtained by referring to said data information tables;

wherein said frame reference position is automatically obtained by photometrically measuring an aperture of a film negative carrier.

6. A method for detecting/processing image information comprising the steps of:

separating light containing all colors from color images into separate beams of monochromatic light of plural colors;

respectively receiving said separate light beams with plural image sensors;

digitally detecting, on a pixel by pixel basis, image information data of an entire area through which said image sensors receive light;

storing said information data in a memory;

processing said stored information data, wherein memory addresses of tables containing said information data are made to correspond with sensor coordinates of respective said image sensors;

photometrically measuring a reference film negative having a mark at a frame reference position;

calculating the amount of deviation, for each sensor, between (a) a sensor coordinate which corresponds to said frame reference position, and (b) a reference coordinate of said sensor;

calculating values of frame coordinates corresponding to each pixel point of said sensor coordinates;

writing said values in said data information tables;

photometrically measuring said images and storing information corresponding thereto in said memory; and

,

processing said image information in accordance with said memory addresses of said frame coordinates obtained by referring to said data information tables;

wherein said frame reference position is automatically obtained by photometrically measuring an aperture of a film negative carrier.

7. A method for detecting/processing color information as claimed in claim 6, wherein said color images are fixed and said image sensors are movable relative to said color images.

8. A method for detecting/processing color image information as claimed in claim 6, wherein said frame reference position is set at one point and said deviation in the longitudinal and lateral directions is corrected based on said set point.

9. A method for detecting/processing color image information as claimed in claim 6, wherein two frame reference positions are set and said deviation in the longitudinal and lateral directions as well as inclination are corrected based on said two frame reference positions.

10. A method for detecting/processing color image information as claimed in claim 6, wherein said sensors and said images are fixed, and reading out area of said memory is operatively variable.

11. A method for detecting/processing image information comprising the steps of:

receiving light from images with an image sensor;

digitally detecting, on a pixel by pixel basis, image information data of an entire area through which said image sensor receives light;

storing said information data in a memory;

processing said stored information, wherein memory addresses in a first information data table correspond with sensor coordinates of said image sensor;

photometrically measuring a reference film negative having a mark at a frame reference position;

calculating the amount of deviation between (a) a sensor coordinate which corresponds to said frame reference position, and (b) a reference coordinate of said sensor;

reading out positional data on size information from said first information data table for each feeding direction and for each size;

obtaining start addresses, where a specific point on an effective area for each case is stored, from said calculated amount of deviation;

writing said start addresses in a second information data table;

photometrically measuring said images and storing information corresponding thereto in said memory in case of ordinary measurement;

processing said images in accordance with said start addresses of said frame coordinate obtained by referring to said second data table;

wherein said images and said image sensor are fixed, and reading out area of said memory is operatively variable.