Keyphrases
- gray images
- color images
- color information
- data compression
- binary images
- gray level
- black and white
- preprocessing step
- edge detection
- low pass
- color space
- gray value
- gray scale
- inverse halftoning
- halftone images
- color features
- local binary pattern
- principal component analysis
- image processing
- dimensionality reduction
- input image
- preprocessing
- feature extraction