Jia-Jin Tsai

Learn More
This study presents a reasonable computational complexity watermarking algorithm to embed hidden pattern into two or more halftone images with Adaptive Noise-Balanced Error Diffusion (ANBEDF). One halftone image is obtained by traditional error diffusion, and the others are obtained by ANBEDF. The visual decoded hidden pattern can be detected when the(More)
Nowadays, most multimedia is stored in compressed bit stream format to save the storage apace or transmission time. This study proposes a novel technique for embedding flexible amounts of data in the bitmap of the improved Ordered Dither Block Truncation Coding (ODBTC) image, where the ordered dithering is used to dither the quantized BTC image to avoid the(More)
  • 1