Keyphrases
- error diffusion
- gray scale
- image quality
- quantization error
- human visual system
- gray level
- inverse halftoning
- halftoning algorithm
- noise shaping
- frequency domain
- color images
- binary images
- color palette
- color reproduction
- blue noise
- input image
- compression ratio
- mid frequency
- halftone images
- gray scale images
- data hiding
- computer vision
- visual quality
- co occurrence
- high quality