Unique sensing system and method for reading playing cards

• US 7,769,232 B2
• Filed: 06/13/2005
• Issued: 08/03/2010
• Est. Priority Date: 07/17/2003
• Status: Expired due to Fees

• Current Assignee: Sg Gaming, Inc. (Scientific Games Corporation)
• Original Assignee: SHFL Entertainment Incorporated (Scientific Games Corporation)
• Inventors: Downs, Justin G. III
• Primary Examiner(s): Chawan; Sheela C
• Application Number:
  US11/152,475
• Publication Number:
  US 20050242500A1
• Time in Patent Office: 1,877 Days
• Field of Search: 273/149.R, 273/292, 273/274, 273/149.P, 273/148.R, 273/309, 273/303, 463 11- 42, 209/587, 209/547, 209/939, 382/100, 382/181
• US Class Current: 382/181
• CPC Class Codes: A63F 1/14 Card dealers
• CPC Class Codes: A63F 2009/2425 Scanners, e.g. for scanning regular characters

Abstract

A sensing system for determining the rank and suit of playing cards is disclosed. The system includes a sensing module capable of reading a line of data from a printed image, a position sensor and a hardware component that combines the signals from the sensing module and position sensor, converts the signal to binary values and compares the converted signal to stored signals. The comparisons are correlated to identify card rank and Suit. The system can be used in a playing card delivery shoe used to control the game of baccarat. The shoe may be a customary dealing shoe equipped with a sensing module, or may be a mechanized shoe. The mechanized shoe may comprise a) an area for receiving a first set of playing cards useful in the play of the casino table card game of baccarat; b) first card mover that moves playing cards from the first set to a playing card staging area wherein at least one playing card is staged in an order by which playing cards are removed from the first set of and moved to the playing card staging area; c) second playing card mover that moves playing cards from the playing card staging area to a delivery area wherein playing cards removed from the staging area to the delivery shoe are moved in the same order by which playing cards were removed from the first set of playing cards and moved to the playing card staging area; and d) playing card reading sensors that read at least one playing card value of each playing card separately after each playing card has been removed from the area for receiving the first set of playing cards and before removal from the playing card delivery area One exemplary sensing system is a CIS line scanning system with an associated card position sensor and a FPGA hardware element.

Claims

1. A sensing apparatus for the determination of at least one of rank or suit of a playing card comprising:

a line scanner capable of scanning a line crossing an area of a card representing rank and/or suit;

a card position sensor; and

a hardware component capable of receiving signals from the line imager and card position sensor, wherein the hardware component forms a vector set from the output from the imager, and compares the vector set to known reference vector sets by correlation in hardware logic circuits without running software to determine rank and suit of a card.

2. The apparatus of claim 1 wherein an output signal from the line scanner is at least one of voltage vs. time, binary data and gray scale data.

3. The apparatus of claim 1 wherein the line scanner comprises a contact image line sensing array and line scanning is initiated by signals from the card position sensor.

4. The apparatus of claim 1 wherein the hardware component is a FPGA or ASIC.

5. The apparatus of claim 1, wherein the card position sensor is selected from the group consisting of:

a CIS sensing array, an optical sensor, ultrasonic sensor, capacitive sensor, inductive sensor, eddy current sensor and microwave sensor.

6. The apparatus of claim 1 and further comprising correlating the vector set with known reference vector sets to identify the at least one of a suit or rank of the playing card.

7. A dealing shoe capable of determining at least one of a rank and value of cards, comprising:

a housing for holding cards to be dealt;

an output opening for removal of cards from the housing; and

a sensing system of claim 1 located proximate the output opening.

8. The dealing shoe of claim 7, and further comprising a logic module capable of controlling the game of Baccarat, the logic module comprising:

a hardware component; and

a microcontroller, the microcontroller comprising;

a card ID module;

a game control module and a configuration module.

9. The dealing shoe of claim 7, and further comprising a card moving mechanism for moving cards from an infeed area to the output opening, wherein cards are sensed before reaching the output opening.

10. An apparatus according to claim 1 comprising a playing card delivery shoe for use in the play of the casino table card game of at least one of baccarat or blackjack from which delivery shoe cards may be dealt comprising a) an area for receiving a first set of playing cards useful in the play of the casino table card game of at least one of blackjack or baccarat;

b) first card mover that moves playing cards from the first set to a playing card staging area wherein at least one playing card is staged in an order by which playing cards are removed from the first set of and moved to the playing card staging area;

c) second playing card mover that moves playing cards from the playing card staging area to a delivery area wherein playing cards removed from the staging area to the delivery shoe are moved in the same order by which playing cards were removed from the first set of playing cards and moved to the playing card staging area; and

d) playing card reading sensors that read at least one playing card value of each playing card separately;

wherein there is a direct or indirect communication link between the playing card reading sensors and a processor, which processor analyzes said data according to rules of play of the game of at least one of blackjack or baccarat and determines results of play for a round of play based upon said data.

11. An apparatus according to claim 1 comprising a card delivery shoe for use in the play of baccarat or blackjack, the shoe having a storage end and a delivery end, the shoe storing a first set of cards in the storage end and allowing manual removal of cards from the delivery end, at least one first sensor in the delivery end that senses when a card is absent from the delivery end and sends a signal to a motor that a card is to be delivered to the delivery end, a card reading sensor, and a motor that mechanically delivers a card to the delivery end of the shoe, wherein there is a communication link between the card reading sensors and a processor, which processor analyzes said data according to rules of play of the game of baccarat or blackjack and determines results of play for a round of play of baccarat or blackjack based upon said data.

12. An apparatus for reading symbols from playing cards comprising:

a contact image sensor line scanning array; and

a card motion sensor, wherein the motion sensor triggers operation of the imager to provide vector signals from playing card symbols passed over the image system to hardware logic circuits that determine suit and rank without running software.

13. The apparatus of claim 12 and further comprising a hardware component capable of receiving input from the contact image line scanning array and the card motion sensor and determining at least one of a card rank and card suit.

14. The apparatus of claim 13 wherein the imager provides spaced line scans of the playing card symbols.

15. The apparatus of claim 14 wherein the signals are provided to an FPGA or ASIC to identify the at least one of a suit or rank of the playing card imaged while software is running on tasks other than determining rank and suit of a card.

16. An apparatus for reading symbols from playing cards comprising:

a line imager that images at spaced intervals on playing cards in at least a region of the card where suit and rank symbols are provided on the playing cards;

a card position sensor; and

a hardware logic circuit component that receives data from the line imager and determines at least one of suit and rank of an imaged playing card without running software for the purpose of analyzing sensed data to determine rank and suit.

17. A method of identifying the rank and suit of a playing card comprising:

automatically taking spaced line scans of rank and or suit symbols printed on a playing card to create operating signals relating to less than all of the area of the symbols; and

hardware correlating the signals with known signals to identify the rank and suit by closest correlation of the scanned symbols and the known symbols without running software for the purpose of analyzing sensed data to determine rank and suit, wherein the operating signals comprise signals indicative of at least one of voltage vs. time, binary values and gray scale values within a range of gray scale values.

18. The method of claim 17 where the spaced line scans are triggered by motion or timing sensors operating when a playing card is moving.

19. A method for identifying suit and rank symbols on playing cards comprising:

passing an area of a card bearing symbols on a playing card over a line scanner, taking at least one line scan of each symbol, providing a signal from the imager to hardware logic circuits that operates without running software to determine rank and suit, and the hardware identifying suit and rank of the playing card from the provided signals, wherein identifying suit and rank based from the provided signal comprises providing a signal indicative of at least gray scale values of the line image and the values are then converted to binary values.

20. The method of claim 19 wherein said imager comprises a contact image line scanning system.

21. The method of claim 19 and further comprising identifying a card position wherein card position information is combined with line scanning information and is correlated to stored reference vector sets in a field programmable gated array to determine suit and rank.

22. The method of claim 21 wherein information of at least one of suit and rank from the field programmable gated array is stored in a database.

23. The method of claim 22 wherein information stored in said database is mined by a processor.

24. The method of claim 21 wherein information of at least one of suit and rank from the field programmable gated array is stored in a card identification module.