Open Access

ARTICLE

Watermark Embedding for Direct Binary Searched Halftone Images by Adopting Visual Cryptography

Yangyang Wang¹, Rongrong Ni^1,*, Yao Zhao¹, Min Xian²

1 Beijing Key Laboratory of Advanced Information Science and Network Technology, Institute of Information Science, Beijing Jiaotong University, Beijing 100044, China.
2 Department of Computer Science, University of Idaho, Idaho Falls , ID 83402, United States.

* Corresponding author: Rongrong Ni. Email: .

Computers, Materials & Continua 2018, 55(2), 255-265. https://doi.org/10.3970/cmc.2018.01732

Abstract

In this paper, two methods are proposed to embed visual watermark into direct binary search (DBS) halftone images, which are called Adjusted Direct Binary Search (ADBS) and Dual Adjusted Direct Binary Search (DADBS). DADBS is an improved version of ADBS. By using the proposed methods, the visual watermark will be embedded into two halftone images separately, thus, the watermark can be revealed when these two halftone images are overlaid. Experimental results show that both methods can achieve excellent image visual quality and decoded visual patterns.

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Keywords

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