A Text Watermarking Based on the Dilation Operation of Mathematical Morphology
Zhang Chun · Computers & Security · 2009
The capacity of the word-shifting coding text watermarking is limited for text image's small character spacing. By constructing two kinds of structure elements, the dilation operation of mathematical morphology is done to increase the character spacing and simultaneously maintain the integrity of the strokes high visual quality in this paper. Based on word-shifting coding, the theoretical results and the empirical data have showed that embedding capacity of the processed image is much higher than that of the unprocessed image.