PURPOSE: To provide a tablet identification system for automatically judging whether or not a selected tablet coincides with a specified brand at the time of automatically selecting and wrapping the tablet of the specified brand by an automatic tablet wrapping machine and to obtain a stable identified result by eliminating the influence of illumination fluctuation at the time of photographing the tablet.

CONSTITUTION: The tablet is placed on a black background board to which a white marker is attached and it is photographed by a television camera. Then, the density value of the entire picture is corrected so as to let the density value of the marker inside the photographed picture be a prescribed reference value. Then, a tablet area inside the picture is corrected to fixed position and direction and a feature vector is extracted from the picture. As the feature vector, the density value vector of the picture is used. The distance of the feature vector and the reference vector of the specified brand stored in a dictionary file 110 is obtained and it is judged that the tablet is the one of the specified brand when the distance is within an allowable value r.σ determined by the dispersion degree σ of the specified brand.