Controlling systems and methods for scanning and inspecting images

• US 5,119,190 A
• Filed: 10/24/1989
• Issued: 06/02/1992
• Est. Priority Date: 03/11/1963
• Status: Expired due to Term

• Current Assignee: Champion Manufacturing Industries, Inc.
• Original Assignee: Champion Manufacturing Industries, Inc.
• Inventors: Lemelson, Jerome H.
• Primary Examiner(s): Peng, John K.
• Application Number:
  US07/426,080
• Time in Patent Office: 952 Days
• Field of Search: 358/125, 358/126, 358/106, 358/93
• US Class Current: 348/95
• CPC Class Codes: B07C 5/10 measured by light-responsive means sorting according to colour B07C5/342
• CPC Class Codes: G01B 11/022 by means of tv-camera scanning
• CPC Class Codes: G06T 1/0014 Image feed-back for automatic industrial control, e.g. robot with camera robots B25J19/023
• CPC Class Codes: G07D 7/12 Visible light, infrared or ultraviolet radiation
• CPC Class Codes: G08B 13/19602 Image analysis to detect motion of the intruder, e.g. by frame subtraction
• CPC Class Codes: G08B 13/1963 Arrangements allowing camera rotation to change view, e.g. pivoting camera, pan-tilt and zoom [PTZ]
• CPC Class Codes: G08B 13/19634 Electrical details of the system, e.g. component blocks for carrying out specific functions
• CPC Class Codes: G08B 13/19652 Systems using zones in a single scene defined for different treatment, e.g. outer zone gives pre-alarm, inner zone gives alarm
• CPC Class Codes: H04N 5/782 on tape

Abstract

An automatic scanning apparatus and method for detecting the presence of one or more objects in an image field under investigation or inspection. Electro-optical scanning means, such as a television camera, is employed to scan an image field and generate output electrical signals which vary in accordancd with variations in the optical characteristics of the matter and objects in the image field scanned. Such signals are computer processed and analyzed to generate coded electrical signals which define optical characteristics of portion of the image field scanned, such as objects or the images scanned, their shape, color of a combination of color and shape. Electronic means is provided to generate further coded electrical signals which indicate the presence of one or more objects in the image field scanned and may be used to effect intelligent indications thereof, to control one or more devices such as a motor or motors, and/or to provide information for computational purposes to be processed and utilized by a computer. In one form, that shape of an object or objects is detected and coded signals generated are employed to effect a comparison of such shape with information relating to the shapes of known objects to identify the object or objects scanned. In another form, the color or surface charcteristics of an object is detected and resulting signals indicative thereof are compared with information derived from a memory to identify either the object or its color or surface characteristics. In a third form both shape and color are detected and compared with recorded information for identification purposes.

Claims

1. A method for controlling scanning of an image field by a camera comprising:

a) scanning an image field with a camera and generating output video signals which vary in accordance with variations in the image field scanned;

b) generating coded electrical signals indicative of the content of at least a portion of the image field scanned;

c) computer analyzing said coded electrical signals and detecting when a select condition exists in the image field scanned and generating further coded electrical signals indicative of said select condition; and

d) applying said further coded signals to control the scanning operation.

2. A method in accordance with claim 1 wherein said control of the scanning operation comprises one or more of the steps of:

a) stopping movement of said camera in scanning a field to maintain said camera scanning the field containing said select condition;

b) adjusting said camera to focus upon a portion of the image field containing said select condition;

c) controlling the scanning operation to cause scanning of a select area of the image field containing said select condition to be effected a number of times; and

d) operating an indicating means to intelligibly indicate information about the select condition.

3. A method in accordance with claim 1 wherein the step of adjusting said camera includes the step of controlling a motor coupled to said camera.

4. A method in accordance with claim 1 furthe comprising the step of applying said further coded signals to control a device for operating on an object in the image field being scanned.

5. A method in accordance with claim 1 wherein the step of operating an indicating means to intelligibly indicate information about the select condition further comprising indicating the location of said select condition in the image field scanned.

6. A method for controlling scanning of an image field by a scanning device comprising:

a) scanning an image field with said scanning device and generating first electrical signals which vary in accordance variations in the image field scanned;

b) generating coded electrical signals indicative of the content of at least a portion of the image field scanned;

c) computer analyzing said coded electrical signals and detecting when a select condition exists in the image field scanned and generating further coded electrical signals indicative of said select condition; and

d) applying said further coded signals to control operation of said scanning device.

7. A method in accordance with claim 6 wherein said step of applying said furthe coded signals to control operation of said scanning device comprises the steps of:

a) stopping movement of said scanning device to maintain said device scanning the field containing said select condition; and

b) adjusting said scanning device to focus upon at least a portion of said field containing said select condition.

8. A method in accordance with claim 6 wherein said step of applying said further electrical signals to control the operation of said scanning device further comprises the steps of:

a) controlling the scanning operation to cause scanning of a select area of the image field containing said select condition to be effected a number of times, and

b) operating an indicating means to intelligibly indicate the select condition and the location thereof in the image field scanned.

9. A method in accordance with claim 6 wherein the step of adjusting said scanning device includes the step of controlling a motor coupled to said scanning device.

10. A method in accordance with claim 7 further comprising the step of applying said further coded electrical signals to control means for operating on an object in the image field scanned.

11. A method in accordance with claim 6 wherein the step of adjusting said scanning device includes the step of controlling a plurality of motors coupled to said scanning device.

12. A method in accordance with claim 7 wherein the step of applying said further coded electrical signals to control means for operating on an object includes the step of controlling a plurality of motors coupled to and driving said operation means.

13. A system for controlling scanning of an image field by a scanning device comprising:

a) scanning means for scanning an image field and generating output signals which vary in accordance with variations in the image field scanned;

b) means for generating coded electrical signals indicative of the content of at least a portion of the image field scanned;

c) means for analyzing said coded electrical signals and detecting when a select condition exists in the image field scanned, and for generating further coded electrical signals indicative of said select condition; and

d) means for applying said further coded electrical signals control the operation of said scanning means.

14. A system in accordance with claim 13 wherein said scanning means comprises an electro-optical scanner.

15. A system in accordance with claim 13 further comprising means coupled to said scanning means for maintaining said scanning means scanning the field containing said select condition.

16. A system in accordance with claim 15 further comprising control means coupled to said scanning means for focusing said scanning with respect to at least a portion of the image field scanned containing said select condition.

17. A system in accordance with claim 16 further comprising actuating means coupled to said means for analyzing said further coded electrical signals for affecting said select condition in response to said further coded electrical signals.

18. A system in accordance with claim 15, wherein said scanning means includes motor means responsive to said means for stopping movement of said scanning means.

19. A system in accordance with claim 16 wherein said control means includes motor means responsive to said further coded electrical signals for altering the focus of said scanning means.

20. A system in accordance with claim 17 wherein said actuating means includes at least one motor which is responsive to said further coded electrical signals.

21. A system in accordance with claim 13 wherein said scanning means comprises an electronic camera.

22. A system in accordance with claim 13 wherein said scanning means comprises an x-ray device.

23. A method for controlling the scanning of an object by a plurality of scanning devices, comprising:

a) causing each of the scanning devices to scan at least a portion of the object and to generate first electrical signals which vary in accordance with variations in the image scanned;

b) generating coded electrical signals in response to the first electrical signals generated by the scanning devices, the coded electrical signals being indicative of the content of at least a portion of the image field scanned by the scanning devices;

c) computer analyzing the coded electrical signals to evaluate the content of the image field scanned by the scanning devices; and

d) generating further coded electrical signals in response to the computer analysis to further control operation of the scanning devices.

24. The method of claim 23 further comprising the step of causing at least one of the plural scanning devices to scan a different portion of the object.

25. The method of claim 23 wherein each of the scanning devices scans a field having a different optical characteristic therein.

26. The method of claim 23 further comprising the step of comparing the coded electrical signals with standard signals recorded in memory.

27. The method of claim 23 further comprising the step of applying said further coded electrical signals to control means for operating on the object being scanned.