Patent ID: 6058225
Filing Date: 2000-05-02
Classification: G06K

Abstract:
An information reproduction system comprising:a light source for lighting optically readable dot codes in pulses when the dot codes are optically read from a recording medium by manual scanning, said recording medium having the dot codes recorded thereon to represent multimedia data including at least one of audio data, image data and digital code data;an image pick-up unit which picks up images of the dot codes when the dot codes are lit in pulses by said light source during the manual scanning;a processor which processes image signals respectively corresponding to the picked up images of the dot codes so as to restore the multimedia data represented by the dot codes;an output device which reproduces and outputs the multimedia data based on an output signal from said processor;a detector which detects reflection light amounts from the recording medium having the dot codes recorded thereon when the dot codes are lit in pulses by said light source during the manual scanning; anda controller which controls a pulse width of said light source pulses in accordance with the reflection light amounts detected by said detector,wherein the pulse width of said light source pulses is set to correspond to a period of an exposure of said image pick-up unit.