Kddi Corporation

Emi Myodo

Shigeyuki Sakazawa

Yasuhiro Takishima

A barcode-embedding area is obtained in a color image based on expression possibility by the juxtaposed additive color mixture and possibility of reading of pixels separately by a barcode reader (S), a color image in the barcode-embedding area is expressed by the juxtaposed additive color mixture, and color images for the code area and the background area, which are readable by the barcode reader, are created (S, S), a color-image-superimposed barcode image is created by using the color images for the code area and the background area, and the same color-image-superimposed barcode image is embedded in the barcode-embedding area (S), and the color-image-superimposed barcode image and the original color image are corrected if necessary (S, S).

Method, apparatus and computer program for embedding barcode in color image

First, a set of seed images that tally with each other are prepared (S). Next, a set of threshold matrices are created from the set of seed images (S). Next, a plurality of tally images are created from an input gray-scale image by using the set of threshold matrices (S). The tally images are combined, whereby the confidential image is decoded.

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Saitama, Japan

Emi Myodo