TY - JOUR AU - Lee, Jia-Hong AU - Wu, Mei-Yi AU - Wu, Hong-Jie PY - 2010 DA - 2010/11/12 TI - A New Inverse Halftoning Method Using Reversible Data Hiding for Halftone Images JO - EURASIP Journal on Advances in Signal Processing SP - 430235 VL - 2010 IS - 1 AB - A new inverse halftoning algorithm based on reversible data hiding techniques for halftone images is proposed in this paper. The proposed scheme has the advantages of two commonly used methods, the lookup table (LUT) and Gaussian filtering methods. We embed a part of important LUT templates into a halftone image and restore the lossless image after these templates have been extracted. Then a hybrid method is performed to reconstruct a grayscale image from the halftone image. In the image reconstruction process, the halftone image is scanned pixel by pixel. If the scanned pattern surrounding a pixel appeared in the LUT templates, a gray value is directly predicted using the LUT value; otherwise, it is predicted using Gaussian filtering. Experimental results show that the reconstructed grayscale images using the proposed scheme own better quality than both the LUT and Gaussian filtering methods. SN - 1687-6180 UR - https://doi.org/10.1155/2010/430235 DO - 10.1155/2010/430235 ID - Lee2010 ER -