Abstract
In this paper, validity of the identification of rubber/photopolymer stamps produced from the same character design inspection was done. Stamps produced from the same character design have the same stamp face and their impressed images are expected to be too similar to be identified. Ten rubber stamps and 10 photopolymer stamps were used for the examination. The template matching between the standard image and other stamped images was performed with the rubber stamp images and photopolymer stamp images. Intra-individual variance and inter-individual variance of stamped images were calculated and compared. The average of the matching rate of intra-individual variance was compared with the average of the matching rate of inter-individual variance. The results showed no significant difference between these averages. The inseparability of the intra-individual variance and the inter-individual variance suggested the difficulty in the stamp identification.
