A Perceptual Image Sharpness Metric Based on Local Edge Gradient Analysis.
Christoph FeichtenhoferHannes FassoldPeter SchallauerPublished in: IEEE Signal Process. Lett. (2013)
Keyphrases
- edge detection
- image analysis
- gradient direction
- input image
- edge map
- image data
- single image
- image retrieval
- visual perception
- multiscale
- image features
- gradient information
- step edges
- image quality assessment
- gradient field
- grey level
- information content
- gradient magnitude
- gray value
- sobel operator
- image classification
- zero crossing
- image gradient
- edge detector
- image fidelity
- image editing
- image edges
- low level
- orientation histogram
- image segmentation
- quality assessment
- gradient orientation
- empirically derived
- similarity measure
- edge orientation
- gradient domain
- image quality metrics
- image quality
- edge pixels
- perceptual quality
- image enhancement
- vector field
- noise reduction