Gambling chip recognition system

• US 5,781,647 A
• Filed: 10/27/1997
• Issued: 07/14/1998
• Est. Priority Date: 10/05/1995
• Status: Expired due to Term

• Current Assignee: IGT (International Game Technology), SHFL Entertainment Incorporated (Scientific Games Corporation)
• Original Assignee: Digital Biometrics, Inc. (Advent International Corporation)
• Inventors: Klingert, Jack, Fishbine, Glenn M.
• Primary Examiner(s): PITTS, HAROLD I
• Application Number:
  US08/962,915
• Time in Patent Office: 260 Days
• Field of Search: 382/1, 382/375, 382/472
• US Class Current: 382/100
• CPC Class Codes: G07D 5/005 Testing the surface pattern, e.g. relief
• CPC Class Codes: G07D 5/02 Testing the dimensions, e.g. thickness, diameter; Testing the deformation
• CPC Class Codes: G07D 9/04 Hand- or motor-driven devices for counting coins counting mechanisms in general G06M
• CPC Class Codes: G07F 17/32 for games, toys, sports, or amusements

Abstract

A computer implemented gambling chip recognition system having the ability to capture an image of a stack of gambling chips and automatically processing the image to determine the number of chips within the stack and the value of each. The system processor determines the classification for each chip in a stack by way of processing performed in real time on the image of the stack of gambling chips. The system further includes the ability to communicate the information derived from the stack of gambling chips to a video monitor and the ability to communicate the information to a main database where information is being compiled and stored about an individual gambler.

Claims

1. A computer implemented gambling chip recognition system for automatically determining the number of chips and the value of each chip within a stacked pile of one or more chips comprising:

an imager for generating an image of at least one chip;

data storage electrically interconnected to said imager for storing at least a portion of said image,

said data storage storing a plurality of predetermined chip representations, wherein said plurality of predetermined chip representations define a gambling chip value classification system with each predetermined chip representation having a gambling chip value assigned thereto; and

a processor electrically interconnected to said data storage for processing said image to determine the number of chips within the stacked pile and generate a chip representation for each chip, said processor determining the number of chips within the stacked pile by identifying chip edges for each chip within said image.

2. The computer implemented gambling chip recognition system of claim 1 wherein said imager comprises:

an image converter for converting a video image to a digital image wherein each discrete pixel of data within said video image is represented digitally.

3. The computer implemented gambling chip recognition system of claim 2 wherein said image converter converts said video image to a digital image by converting each pixel of data within said frame of said video image to a digital representation.

4. The computer implemented gambling chip recognition system of claim 3 wherein said system stores said digital representation of said image.

10. The system of claim 1 wherein said data storage is an analog storage medium.

11. The system of claim 1 wherein said data storage is a digital storage medium.

12. The system of claim 1 wherein the portion of said image representing the stacked pile of chips is identified by computing a pixel variance value for pixels comprising said image and comparing each said pixel variance value to a threshold variance value.

13. The system of claim 1 wherein the edges of each individual chip within the stacked pile of chips is identified by computing a pixel variance value for pixels comprising said image, comparing each said pixel variance value to a threshold variance value and applying an edge detection filter to said pixels comprising said image.

5. A computer implemented method for determining the number of chips and the value assigned each chip within a stacked pile of one or more gambling chips comprising the steps of:

imaging the stacked pile of chips;

storing said image;

determining the number of chips within the stacked pile of chips by identifying chip edges for each chip within said image; and

determining a chip representation for each chip within the stacked pile of chips by comparing each said chip representation with a plurality of predetermined chip representations wherein each predetermined chip representation defines a casino chip having a specific monetary value.

14. The method of claim 5 wherein said processing step includes the steps of:

computing a pixel variance value for pixels comprising said image; and

comparing each said pixel variance value comprising said image to a threshold variance value to identify the portion of said image representing the stacked pile of chips.

15. The method of claim 5 wherein said processing step includes the steps of:

identifying the edges of each individual chip within the stacked pile of chips by computing a pixel variance value for pixels comprising said image;

comparing each said pixel variance value to a threshold variance value; and

applying an edge detection filter to said pixels comprising said image.

6. A gambling chip recognition system for automatically determining the number of chips and the value of each chip within a stacked pile of one or more chips comprising:

an imager for capturing a digital representation of an image representing the stacked pile of one or more chips;

data storage electrically connected to said processor and;

a processor electrically connected to said imager, said processor determining the number of chips within the stacked pile of one or more chips by identifying the edges of each chip, said edges of each chip identified by computing pixel variance value for pixels comprising said image, comparing said pixel variance values to a threshold variance values and applying an edge detection filter to said pixels comprising said image.

7. The gambling chip recognition system of claim 6 wherein said imager includes a video camera electrically connected to a frame grabber, said frame grabber capturing frames of video images generated by said video camera and converting said video images to digital representations.

8. The gambling chip recognition system of claim 6 wherein said data storage stores a plurality of predetermined chip representations, wherein said plurality of predetermined chip representations define a gambling chip value classification system with each predetermined chip representation having a gambling chip value assigned thereto.

9. The gambling chip recognition system of claim 6 wherein said processor processes said digital representations of said image representing the stacked pile of gambling chips to generate a chip representation for each chip and determine the number of chips, said processor compares each said chip representation against a plurality of predetermined chip representations to determine the value of each chip within the stacked pile.

16. The system of claim 6 wherein said data storage stores a plurality predetermined chip representations, wherein said plurality of predetermined chip representations define a gambling chip classification system with each predetermined chip representation having a gambling chip value assigned thereto, said processor generating a chip representation for each chip and comparing each said chip representation against said plurality of predetermined chip representations to determine the value of each chip within the stacked pile.