A gradient-based optimization approach for reduction of blocking artifacts in JPEG images.
Reza Pourreza-ShahriSiamak YousefiNasser KehtarnavazPublished in: Signal Process. Image Commun. (2014)
Keyphrases
- jpeg images
- blocking artifacts
- discrete cosine transform
- compressed images
- dct coefficients
- block boundaries
- dct domain
- image compression
- low bit rate
- image quality
- post processing
- transform domain
- visual quality
- high frequency
- reconstructed image
- bitstream
- human visual system
- compressed domain
- preprocessing
- image blocks
- compression ratio
- filter bank
- bit rate
- image data