Keyphrases
- human visual system
- qr codes
- human vision
- color perception
- human perceptual
- qr code
- image quality
- barcode
- human perception
- error diffusion
- retinex theory
- visual quality
- wavelet domain
- saliency map
- color images
- color information
- visual information
- linked data
- virtual space
- watermark embedding
- augmented reality
- pixel values
- color vision
- image features
- high quality