24 January 2012 Real-time, multidirectional 2D fast wavelet transform and its denoised sharpening application
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Abstract
This paper presents a real-time multi-directional 2D fast wavelet transform. As a real-time implementation of wavelet, small pixel windows in raster scan order are sequentially used as inputs to the transform instead of full image frame. This approach is corresponding to a recent image sensor releasing image pixels in line-by-line scanning order. The proposed method has high locality property so as to achieve low-latency real-time implementation adequate for recent mobile highly cost-effective application and it uses multi-directional decomposition which enables the transform to reduce the directional artifacts often occurring in conventional two-directional separable decomposition wavelet. As a possible application of the proposed wavelet, denoised sharpening algorithm was devised and the result is presented, representing the enhancement of directional and blocking artifacts problem.
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B. J. Baek, B. J. Baek, T. C. Kim, T. C. Kim, } "Real-time, multidirectional 2D fast wavelet transform and its denoised sharpening application", Proc. SPIE 8299, Digital Photography VIII, 82990T (24 January 2012); doi: 10.1117/12.909562; https://doi.org/10.1117/12.909562
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