Digital halftoning
Steganography in halftone images: conjugate error diffusion
Signal Processing - Special section: Security of data hiding technologies
Data hiding watermarking for halftone images
IEEE Transactions on Image Processing
Hybrid pixel-based data hiding and block-based watermarking for error-diffused halftone images
IEEE Transactions on Circuits and Systems for Video Technology
Data hiding in a halftone image using hamming code (15, 11)
ACIIDS'11 Proceedings of the Third international conference on Intelligent information and database systems - Volume Part II
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Most recent papers about visual cryptography for halftone images are dedicated to get a higher contrast decoded image. However, the hidden visual pattern often blends into the background image and leads to a confused image. In this paper, we propose an improved method for halftone image hiding. By using the proposed method, the background image can be eliminated and the hidden visual pattern can be revealed precisely. Experimental results show that the decoded visual patterns could reveal good visual quality under various kinds of input patterns. Furthermore, better visual quality can be obtained when more halftone images are overlaid.