Method for producing a third image that clarifies the differences between two images which are allocated to one another

• US 4,979,222 A
• Filed: 02/21/1990
• Issued: 12/18/1990
• Est. Priority Date: 02/21/1989
• Status: Expired due to Fees

• Current Assignee: Joerg Weber
• Original Assignee: Joerg Weber
• Inventors: Weber, Joerg
• Primary Examiner(s): Boudreau, Leo H.
• Assistant Examiner(s): Fallon, Steven P.
• Application Number:
  US07/483,085
• Time in Patent Office: 300 Days
• Field of Search: 382/6, 382/1, 382/22, 382/27, 382/30, 382/34, 382/4
• US Class Current: 382/254
• CPC Class Codes: G06T 1/00 General purpose image data processing
• CPC Class Codes: G06T 5/50 using two or more images, e.g. averaging or subtraction

Abstract

A method for producing a third image that clarifies the differences between two images which are allocated to one another is proposed in which the regions in which a parameter value of the image signals of the first image is greater than the parameter value of the image signals of the second image are reproduced by strips extending in a first direction and those regions in which the parameter value of the image signals of the second image is greater than the parameter value of the image signals of the first image are reproduced by strips extending in a second direction that extends at a right angle relative to the first direction, and the strips alternately correspond to the image signals of the first image and to image signals of the second image.

Claims

1. A method for producing a third image that clarifies the differences between two images which are allocated to one another, comprising the steps of:

acquiring first image signals corresponding to the picture elements of a first image;

acquiring second image signals corresponding to the picture elements of a second image;

acquiring third image signals corresponding to the picture elements of a third image by

forming matrices composed of 2×

2 image signals of mutually-adjacent picture elements (1₀₀, 1₀₁, 1₁₀, 1₁₁) of the first image,

forming matrices composed of 2×

2 image signals of mutually-adjacent picture elements (2₀₀, 2₀₁, 2₁₀, 2₁₁) of the second image;

forming matrices composed of 2×

2 image signals of mutually-adjacent picture elements of the third image by allocating the image signals of the first picture elements (1₀₀) of the matrices of the first image to the corresponding picture elements of the third image;

allocating the image signals of the second picture elements (2₁₁) of the matrices of the second image lying diagonally opposite the first picture elements to the corresponding picture elements of the third image;

allocating the image signals of third picture elements (1₀₁ or, respectively, 2₀₁) of the matrices of the first and of the second image that are greater with respect to a predetermined parameter to the corresponding picture elements of the third image; and

allocating the image signals of fourth picture elements (1₁₀, or, respectively, 2₁₀) of the matrices of the first image and of the second image lying diagonally opposite one another that are smaller than the image signals of the third picture elements with respect to a predetermined parameter to the corresponding picture elements of the third image,

whereby the regions in which the parameter value of the image signals of the first image is greater than the parameter value of the image signals of the second image are produced in the reproduced image by strips extending in a first direction and the regions in which the parameter value of the image signals of the second image is greater than the parameter value of the image signals of the first image are reproduced in the reproduced image by strips extending in a second direction that extends at a right angle relative to the first direction, and the strips alternately correspond to the image signals of the first image and to the image signals of the second image.

2. The method of claim 1, and further defined by the step of:

selecting and applying brightness as the parameter value of the image signals in the steps of allocating the image signals of the third picture elements and the image signals of the fourth picture elements.