基於彩色影像之可逆式資訊隱藏在快速響應矩陣碼的應用

Reversible Data Hiding in Color Image for QR code Applications

傅耀德(Yao-Der Fu)

指導教授 ： 王釋毅

國立高雄師範大學/科技學院/光電與通訊工程學系/碩士(2015年)

https://doi.org/10.6817/NKNU.2015.00001

摘要

摘要
QR code(快速響應矩陣碼)是由日本公司 Denso Wave所發明的二維的矩陣條碼，人們廣泛的利用智慧型手機去讀取QR code中的網址、文字資料或影像等。而可逆式資料隱藏(Reversible Data Hiding)是資訊隱藏的一個派系，其主要的目的在於媒體被嵌入秘密資訊，並取出隱藏的資訊後，媒體可以完整的還原成尚未被嵌入的狀態。在現今浮水印的技術中，可逆式資訊隱藏結合QR code為一種新發展的應用，主要在原始影像中插入QR code。掃描完QR code之後，將QR code至影像中移除，再使用資訊隱藏的技術得到原始影像。如何降低嵌入的資訊量及減少影像的失真為主要努力的重點。
本論文為基於彩色影像之可逆式資訊隱藏在快速響應矩陣碼的應用，提出依據QR code在對應的彩色影像中，使用像素的改變，產生可識別的浮水印。這個方法於人眼可識別的，接下來其他的資訊利用資訊隱藏技術藏入。最後在還原影像之後，仍然可以保有不失真，與原始影像相同。

關鍵字

資訊隱藏 ； 可逆式 ； QR code ； 彩色影像

並列摘要

Abstract
The Quick Response code (the QR code) is a two-dimensional matrix barcode which was invented by Denso Wave Japanese corporation. People utilize the smart phone to obtain information such as the URL, the text data, the image from the QR code. Reversible data hiding is a branch of steganography. The main characteristic of reversible data hiding is that the media (e.g., the pictures or the images) can be recovered to initial state after information is taken out. Reversible data hiding for QR code is a newly developed application in watermarking researches. In this issue, the presented method is to insert the QR code into the original image. After scanning the image containing the QR code, the QR code can be removed and the original image can be recovered by reversible data hiding. There are two key points in designing a reversible data hiding for QR code scheme: the lower hiding information and the reduced image distortion.
This paper proposes a reversible data hiding in color image for QR code applications. The proposed method enables to embed the QR code into the color image to produce visible watermark. First, the embedding approaches are based on the changing pixels. After the embedding process, it is visible to human. Some information is embedded by using reversible data hiding. It can be extracted watermark and recovered the original image completely.

並列關鍵字

Data hiding ； Reversible ； QR code ； Color image

參考文獻

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