Keyphrases
- error diffusion
- gray scale
- image quality
- multiresolution
- human visual system
- quantization error
- gray level
- inverse halftoning
- frequency domain
- d mesh
- halftoning algorithm
- noise shaping
- halftone images
- mid frequency
- gray scale images
- data hiding
- visual quality
- binary images
- color palette
- high quality
- high level
- image processing