In this paper, we propose an architecture design of QR code
tracing system on the World Wide Web and a robust data
hiding technique for this application using 8x8 Discrete Cosine
Transform (DCT) based transform. In the next section we will
describe the overall system and components. We will also
explain about data hiding algorithm that is used in the data
hiding process module. We also use the histogram of DC image
parameter as indexing key in the target database, which will be
used to retrieve the original image from the source database in
order to make the final decision whether the image being
questioned is really copyrighted. The DC image also can serve
as a thumbnail version of the original-size image and can be
used for rapid browsing.