Keyphrases
- input image
- estimation algorithm
- image features
- single image
- image data
- image content
- template matching
- image analysis
- image retrieval
- multiscale
- image collections
- image classification
- image representation
- image pixels
- spatial frequency
- orientation estimation
- region of interest
- location and orientation
- hough transform
- keypoints
- image database
- low level
- position and orientation
- spatial information
- image matching
- pixel values
- high resolution
- dominant orientation
- gaussian derivatives
- displacement estimation
- image segmentation
- test images
- segmentation method
- similarity measure
- feature extraction