DEVICE VERIFICATION USING PRINTED PATTERNS AND OPTICAL SENSING

摘要

A device verification method includes the steps of providing a device including a memory and a print pattern generator communicatively coupled to the memory, the print pattern generator generating image data based at least in part on a first value actually stored in a first memory location in the memory; printing the image data to produce a printed verification pattern; scanning the printed verification pattern to generate a verification value; reading a memorized value purportedly stored in the first memory location of the memory; comparing the memorized value with the verification value; and evaluating the device based on a result of the comparing step.