Casino Chip Fraud Detection with ToF Depth Measurement
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Solution Overview
Problem
Existing casino fraud detection systems face challenges in accurately determining chip amounts due to blind spots and overlapping chips, and cannot detect sophisticated fraud methods like card squeegee or dealer-player conspiracies.
Innovation Solution
A fraud detection system using a game recording apparatus, image analyzing apparatus, and control device with artificial intelligence and deep learning capabilities to analyze chip and card positions, types, and amounts, and compare them against win/lose results to detect fraud.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If surveillance cameras are used to monitor chip movement, then fraud detection capability is improved, but measurement precision deteriorates due to blind spots and overlapping chips
Solution Approach 1:
The patent transitions from two-dimensional camera imaging to three-dimensional depth information acquisition using time-of-flight (ToF) measurement. By measuring the time for light to travel to and from the chip surface, the system obtains depth data that enables accurate chip quantity determination even when chips overlap or are in blind spots, resolving the measurement precision issue while maintaining fraud detection capability
Solution Approach 2:
The patent replaces the mechanical/optical limitation of traditional camera-based monitoring with a light-based time-of-flight measurement system. Instead of relying on visual recognition that fails with overlapping chips, the system uses optical time measurement to directly quantify chip presence, eliminating the measurement precision problem while preserving fraud detection reliability
2Measurement precision
If multiple cameras are added to eliminate blind spots, then measurement precision is improved, but device complexity increases
Solution Approach 1:
The patent makes the imaging device multi-functional by integrating both traditional imaging capability and time-of-flight measurement capability into a single system. This allows the device to perform both visual monitoring and accurate chip quantity measurement using the same hardware platform, avoiding the need for multiple separate cameras and reducing system complexity
Solution Approach 2:
The patent combines the imaging function and depth measurement function into a single integrated system. By merging these functions, the patent eliminates the need for multiple separate camera systems while achieving accurate chip quantity determination, thus reducing device complexity while improving measurement precision
Data Source
AI summary
A fraud detection system which detects fraud in a game of performing collection and redemption of chips in accordance with a win or lose result includes a camera which captures an image of chips contained in a chip tray of a dealer, an image analyzing apparatus which analyses the image captured by the camera to detect an amount of the chips contained in the chip tray, a card distribution device which determines a win or lose result of a game, and a control device which compares the win or lose result of the game and the amount of the chips contained in the chip tray before and after collection and redemption of the chips to detect fraud.