Image processing for part inspection

• US 4,547,897 A
• Filed: 02/01/1983
• Issued: 10/15/1985
• Est. Priority Date: 02/01/1983
• Status: Expired due to Fees

• Current Assignee: Honeywell Incorporated (Honeywell International Inc.)
• Original Assignee: Honeywell Incorporated (Honeywell International Inc.)
• Inventors: Peterson, Russell H.
• Primary Examiner(s): Boudreau, Leo H.
• Application Number:
  US06/462,744
• Time in Patent Office: 987 Days
• Field of Search: 358/22, 358/27, 358/43, 358/44, 358/71, 358/101, 382/17, 382/8, 250/226, 356/425, 356/402, 356/405, 356/406, 356/408
• US Class Current: 382/162
• CPC Class Codes: H04N 9/75 Chroma key

Abstract

Apparatus for use with black and white processing systems to detect and identify color as observed by a color television camera including a chromakeyer which is set to select a particular color and submit this as part of the information to the image processing system.

Claims

1. The method of inspecting a manufactured item to determine a selected characteristic thereof comprising the steps of:

viewing an item with a color television camera to produce a video signal;

selecting a predetermined color with a chromakeyer connected to the camera to receive the video signal and to produce a modified signal wherein the selected color is highlighted;

assigning gray scale values based on hue to individual portions of the modified signal so that the highlighted portions receive higher gray scale values; and

comparing the higher gray scale values with predetermined values to determine the selected characteristic when a match occurs.

2. The method of claim 1 wherein the step of assigning gray scale values based on hue is assigning digital gray scale values and includes the additional step of storing the digital gray scale values in a memory of a computer, the predetermined values also being stored in the memory of the computer.

3. The method of claim 1 wherein the step of selecting a predetermined color includes the step of automatically selecting more than one predetermined color at a later time in accordance with a predetermined program.

4. Industrial inspection apparatus for inspecting a manufactured item and determining a desired characteristic thereof comprising:

a color television camera viewing the item and producing an electronic output representative of an image of the object;

a chromakeyer connected to said camera to receive the electronic output and operable to produce a modified output in which a selected color is highlighted; and

gray scale image processing apparatus connected to said chromakeyer to receive the modified output, said image processing apparatus assigning gray scale values to individual portions of the modified output with the selected color being assigned gray scale values which are higher than non-selected colors so that such higher values may be used for determining the desired characteristic of the item.

5. Apparatus according to claim 4 where the gray scale values are digital and said image processing apparatus includes a computer for storing the digital gray scale values in a memory, the computer being programmed to compare the digital gray scale values with predetermined values, a match indicating the desired characteristic.

6. Apparatus according to claim 4 wherein said chromakeyer includes a selector operable to change the selected color.

7. Apparatus according to claim 6 wherein said selector is operated in accordance with a predetermined program.