Patent ID: 7672532

Claim:
A computer-implemented method of extracting a message code from a message carrier that is displayed on a display screen comprising: transmitting, with a computer, a first portion of a signal that defines an image of a high-intensity region, wherein the high-intensity region represents a first data bit value of the message code; transmitting, with the computer, a second portion of the signal that defines an image of a dithered region that absorbs overflowing charge from the high-intensity region, wherein the dithered region is located adjacent to the high-intensity region; and transmitting, with the computer, a third portion of the signal that defines an image of a low-intensity region, wherein the low-intensity region represents a second data bit value of the message code and is located adjacent to the dithered region; wherein the images of the high-intensity region, the dithered region, and the low-intensity region are captured from the display with a universal digital assistant and the message code is extracted from the images.