Color to gray and back: color embedding into textured gray images

@article{Braun2005ColorTG,
  title={Color to gray and back: color embedding into textured gray images},
  author={Karen M. Braun and Ricardo L. de Queiroz},
  journal={IEEE Transactions on Image Processing},
  year={2005},
  volume={15},
  pages={1464-1470}
}
We have developed a reversible method to convert color graphics and pictures to gray images. The method is based on mapping colors to low-visibility high-frequency textures that are applied onto the gray image. After receiving a monochrome textured image, the decoder can identify the textures and recover the color information. More specifically, the image is textured by carrying a subband (wavelet) transform and replacing bandpass subbands by the chrominance signals. The low-pass subband is the… CONTINUE READING
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