Penrose demosaicking

IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society
Chenyan BaiYen-Wei Chen

Abstract

The Penrose pixel layout, an aperiodic pixel layout in rhombus Penrose tiling, has been shown to substantially outperform the existing square pixel layout in super-resolution. However, it was tested only on grayscale images. To study its performance on color images, we have to reconstruct regular color images from Penrose raw images, i.e., images with only one color component at each Penrose pixel, resulting in the problem of demosaicking from Penrose pixels. Penrose demosaicking is more difficult than regular demosaicking, because none of the color components of the reconstructed regular color images are available. Therefore, most of the traditional demosaicking methods do not apply. We develop a sparse representation-based method for Penrose demosaicking. Extensive experiments show that Penrose pixel layout outperforms regular pixel layouts in terms of both perceptual evaluation and S-CIELAB. The Penrose pixel layout is unique among all irregular layouts because it is uniformly three-colorable and it has only two pixel shapes, thick and thin rhombi, making its manufacturing relatively easy.

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Citations

Feb 19, 2016·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society· Chenyan Bai Jian Yu
Jun 3, 2016·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society·Jiqing WuLuc Van Gool
Mar 14, 2017·IEEE Transactions on Image Processing : a Publication of the IEEE Signal Processing Society· Jia Li Jian Yu

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