Contour detection improved by frequency domain filtering of gradient image.
Zhiguo QuYinghui GaoPing WangPeng WangXiansi TanZhenkang ShenPublished in: Sci. China Inf. Sci. (2014)
Keyphrases
- frequency domain
- contour detection
- cross correlation
- bandpass
- directional filtering
- fourier transform
- spatial domain
- image segmentation
- image data
- input image
- multiscale
- power spectra
- template matching
- image features
- edge detection
- region segmentation
- image representation
- image regions
- segmentation algorithm
- image content
- single image
- fast fourier transform
- filter bank
- image classification
- spectral signatures
- feature extraction
- low pass
- subband
- denoising
- pixel level
- mid frequency
- image analysis
- image retrieval
- perceptual grouping
- edge map
- keypoints
- binary images
- feature points
- video sequences
- feature selection