This project will explore another tamper-resistance method using computer vision technique to protect the product at the PCB assembly level. Every time the device is powered on, the image of the PCB is captured and compared with the reference image to check whether suspicious components have been inserted into the device. The approach used in this project is background subtraction with image registration as the pre-processing step to enhance accuracy. With this approach, most of the test objects are detected successfully, even for small objects such as a 1.25 × 2 mm SMD capacitor or even a 0.25mm diameter AWG30 wire. Although there is much work to be done before this approach becomes available on real devices, this project successfully demonstrates the idea of using computer vision in this anti-tampering application.
This project is initiated by VeriFone Singapore Pte Ltd under the industry collaboration scheme.