Apparatus and method for processing image for reproducing a point of intersection of a black line and a line of another color

• US 5,870,531 A
• Filed: 07/24/1997
• Issued: 02/09/1999
• Est. Priority Date: 03/22/1990
• Status: Expired due to Term

• Current Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Original Assignee: Canon Kabushiki Kaisha (Canon Inc.)
• Inventors: Shimizu, Hideaki, Sakai, Masanori
• Primary Examiner(s): ROGERS, SCOTT A
• Application Number:
  US08/899,892
• Time in Patent Office: 565 Days
• Field of Search: 395/109, 358/518, 358/530, 358/529, 358/520, 358/521, 358/523, 358/501, 358/540, 358/502, 358/503, 358/537, 382/167
• US Class Current: 358/1.9
• CPC Class Codes: H04N 1/56 Processing of colour picture signals H04N1/52 takes precedence
• CPC Class Codes: H04N 1/58 Edge or detail enhancement; Noise or error suppression, e.g. colour misregistration correction H04N1/62 takes precedence

Abstract

The present invention relates to an image processing apparatus and a method of forming an image by separating color information into two or more color information items. The boundary of images is compensated, the images being the images formed by an analog recording system for forming an image on a recording medium by removing a predetermined color component from an original document image and a digital recording system for forming an image on said recording medium by extracting a predetermined color component from said original document image. Therefore, if a slight positional deviation takes place between images formed by the analog recording system and the digital recording system, a want of color information can be prevented. Therefore, the deviation can be satisfactorily compensated so that an original image can be correctly reproduced.

Claims

1. An image processing method comprising the step of:

inputting image data representing a first line image which is black and a second line image which is another color; and

reproducing a point of intersection between a first line image and the second line image with both black and the other color.

2. An image processing method according to claim 1, wherein the image data is read by CCD scanner.

3. An image processing method according to claim 1, wherein in said reproducing step, reproduction is performed using an electronic photograph type printer.

4. An image method according to claim 1, wherein the first color is red and said second color is black.

5. An image processing method comprising the steps of:

inputting image data representing a first color and a second color; and

generating image data to reproduce a boundary between a first area having the first color and a second area having the second color with both the first color and the second color.

6. An image processing method according to claim 5, wherein the image data is read by a CCD scanner.

7. An image processing method according to claim 5, wherein, in said reproducing step, reproduction is performed using an electronic photograph type printer.

8. An image processing method according to claim 5, wherein the first color is red and the second color is black.