Abstract
This paper proposes a method for decorating QR code, a kind of 2-dimensional barcode, with some illustrations inside the code in order to enhance the attractiveness and look-and-feel of the QR code. The proposed system formulates the task of finding appropriate positions, scales, and angles of illustrations, and solves the task by using general-purpose optimization solvers. The proposed system can therefore merge illustrations into the code without detracting machine-readability and stored information. This paper has shown that the proposed method could decorate still and anumated barcode images with illustrations inside the code.