Patent ID: RE39985

Claim:
An information reproducing system comprising: code reading means for reading a desired dot code from an information recording medium on which multimedia information including at least any one of audio information, image information and digital code data has been recorded in the form of a dot code which can optically be read , to provide an image signal corresponding to an image formed from said dot code that has been read ; binarizing means for generating binarized data from an said image signal corresponding to the dot code read by said code reading means ; and information reproducing means for restoring said binarized data generated by said binarizing means to original the multimedia information to reproduce and for reproducing the multimedia information, wherein said binarizing means includes: reference dot detection means which binarizes the image signal with a predetermined threshold value prior to generating binarized data so as to detect for detecting a reference dot from the said binarized code image data by use of a predetermined threshold value ; dot area measuring means for measuring the an area of the reference dot detected by said reference dot detection means; and threshold value modifying means for modifying the obtaining a modified threshold value derived in such a manner that the area measured by said dot area measuring means approaches a predetermined target value ; and , threshold value determining means for binarizing the image signal with the threshold value modified by said threshold value modifying means. wherein said binarizing means generates said binarized data from said image signal based on said modified threshold value.