TY - EJOU AU - Wang, Yangyang AU - Ni, Rongrong AU - Zhao, Yao AU - Xian, Min TI - Watermark Embedding for Direct Binary Searched Halftone Images by Adopting Visual Cryptography T2 - Computers, Materials \& Continua PY - 2018 VL - 55 IS - 2 SN - 1546-2226 AB - 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. KW - Data hiding KW - halftone KW - direct binary search KW - visual watermark DO - 10.3970/cmc.2018.01732