Towards relative gradient and its applications

Yang Wang; Hongzhi Liu; Zhonghai Wu

doi:10.1117/12.2179516

4 March 2015 Towards relative gradient and its applications

Yang Wang, Hongzhi Liu, Zhonghai Wu

Proceedings Volume 9443, Sixth International Conference on Graphic and Image Processing (ICGIP 2014); 94432Z (2015) https://doi.org/10.1117/12.2179516
Event: Sixth International Conference on Graphic and Image Processing (ICGIP 2014), 2014, Beijing, China

Abstract

Image gradients which present directional changes of pixel values in an image are widely considered as important clues for salient features like edges. However, it is difficult to distinguish edges from details which also have large gradients merely based on gradients. In this paper, we propose a novel model called relative gradient which can overcome the problem and better distinguish edges from flat regions and details. We demonstrate the effectiveness of our model by improving some representative algorithms using the relative gradient instead of traditional gradient in contexts of edge detection and non-linear filtering. More applications can be found in image processing, analysis and related tasks.

Citation Download Citation

Yang Wang, Hongzhi Liu, and Zhonghai Wu "Towards relative gradient and its applications", Proc. SPIE 9443, Sixth International Conference on Graphic and Image Processing (ICGIP 2014), 94432Z (4 March 2015); https://doi.org/10.1117/12.2179516

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