A novel image scaling algorithm based on wavelet transform and polyphase filtering

Junwei Yang; Linhuang Wu; Yewang Chen; Weijie Yu; Shiyu Lin

doi:10.1117/12.2680046

27 June 2023 A novel image scaling algorithm based on wavelet transform and polyphase filtering

Junwei Yang, Linhuang Wu, Yewang Chen, Weijie Yu, Shiyu Lin

Proceedings Volume 12705, Fourteenth International Conference on Graphics and Image Processing (ICGIP 2022); 1270511 (2023) https://doi.org/10.1117/12.2680046
Event: Fourteenth International Conference on Graphics and Image Processing (ICGIP 2022), 2022, Nanjing, China

Abstract

Due to the poor performance of the traditional interpolation algorithms in terms of the video image scaling effect and the low algorithm complexity required by existing hardware implementations, a scaling algorithm based on wavelet reconstruction and polyphase filtering implementation is proposed. The method first extracts the pre-generated weight coefficients according to the scaling requirements that including scaled image quality, size, and processing speed. Furthermore, the filter coefficients are interpolated with the source image pixel points mapped by the target image through a polyphase filter. Moreover, the resulting interpolated image is selectively decomposed and reconstructed by Haar wavelet transform to generate super-resolution images. The experimental results show that the algorithm improves the scaling quality of the images both subjectively and objectively, while enhancing the processing speed of the images and achieving non-integer scaling.

Citation Download Citation

Junwei Yang, Linhuang Wu, Yewang Chen, Weijie Yu, and Shiyu Lin "A novel image scaling algorithm based on wavelet transform and polyphase filtering", Proc. SPIE 12705, Fourteenth International Conference on Graphics and Image Processing (ICGIP 2022), 1270511 (27 June 2023); https://doi.org/10.1117/12.2680046

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