Median filtering forensics based on discriminative multi-scale sparse coding.
Zunli HuShilin WangPublished in: GlobalSIP (2017)
Keyphrases
- median filtering
- sparse coding
- multiscale
- sparse codes
- natural images
- image representation
- dictionary learning
- discriminative dictionary
- median filter
- post processing
- sparse representation
- unsupervised learning
- image classification
- linear combination
- image patches
- generative model
- scale space
- jpeg compression
- image processing
- vector field
- image denoising
- feature extraction
- denoising
- object recognition
- image enhancement
- semi supervised
- higher order
- edge detection
- image segmentation
- computer vision
- visual words
- test images
- object detection
- input image