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New edge-directed interpolation
Abstract
This paper proposes an edge-directed interpolation algorithm for natural images. The basic idea is to first estimate local covariance coefficients from a low-resolution image and then use these covariance estimates to adapt the interpolation at a higher resolution based on the geometric duality between the low-resolution covariance and the high-resolution covariance. The edge-directed property of covariance-based adaptation attributes to its capability of tuning the interpolation coefficients to match an arbitrarily oriented step edge. A hybrid approach of switching between bilinear interpolation and covariance-based adaptive interpolation is proposed to reduce the overall computational complexity. Two important applications of the new interpolation algorithm are studied: resolution enhancement of grayscale images and reconstruction of color images from CCD samples. Simulation results demonstrate that our new interpolation algorithm substantially improves the subjective quality of the interpolated images over conventional linear interpolation.
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Citations
Cited by
Photo-Realistic Single Image Super-Resolution Using a Generative Adversarial Network
Ledig, C., Theis, L., Huszar, F., Caballero, J., Cunningham, A., Acosta, A., Aitken, A., Tejani, A., Totz, J., Wang, Z., et al. (2017) · 2017 IEEE Conference on Computer Vision and Pattern Recognition (CVPR) · doi:10.1109/cvpr.2017.19 · Cited by 12,696
An edge-guided image interpolation algorithm via directional filtering and data fusion
Zhang, L., & Wu, X. (2006) · IEEE Transactions on Image Processing · doi:10.1109/tip.2006.877407 · Cited by 1,020
Image super-resolution using gradient profile prior
Sun, J., Xu, Z., & Shum, H.-Y. (2008) · 2008 IEEE Conference on Computer Vision and Pattern Recognition · doi:10.1109/cvpr.2008.4587659 · Cited by 916
Yu, G., Sapiro, G., & Mallat, S. (2012) · IEEE Transactions on Image Processing · doi:10.1109/tip.2011.2176743 · Cited by 561
Metadata
- Authors
- Li, X., & Orchard, M. T.
- Venue
- IEEE Transactions on Image Processing
- Published
- 2001
- Volume
- 10
- Issue
- 10
- Pages
- 1521-1527
- ISSN
- 1057-7149 (ISSN-L)
- OpenAlex
- W2172128189
- Cited by
- 2,023
- References
- 0
- FWCI
- 15.25
- Type
- journal article
- Language
- en
- Open access
- closed
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- Li, X., & Orchard, M. T. (2001). New edge-directed interpolation. IEEE Transactions on Image Processing. https://doi.org/10.1109/83.951537
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