Frequency domain filtering of gradient image for contour detection

Zhi Guo Qu, Ping Wang, Ying Hui Gao, Peng Wang, Zhen Kang Shen

Research output: Contribution to journalArticlepeer-review

3 Scopus citations


A novel computational step, frequency-domain filtering of gradient image, is proposed to improve detection of object contours and region boundaries in natural scenes for gradient-based edge detectors. The step is inspired by analyzing the spectrum distribution of object contours and texture edges in the frequency domain of gradient image. We illustrate the principle and effect of the proposed step by adding it to the Canny edge detector. The resulting operator can selectively retain object contours, and meanwhile can dramatically reduce non-meaningful elements resulting from a texture background. Experimental results demonstrate the effectiveness of the proposed additional step. Crown

Original languageEnglish
Pages (from-to)1398-1401
Number of pages4
Issue number13
StatePublished - Jul 2013
Externally publishedYes


  • Contour detection
  • Edge detection
  • Frequency filtering
  • Gradient image


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