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Computationally Efficient Locally Adaptive Demosaicing of Color Filter Array Images Using the Dual-Tree Complex Wavelet Packet Transform

机译:使用双树复数小波包变换的彩色滤光器阵列图像的高效计算局部自适应去马赛克

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摘要

Most digital cameras use an array of alternating color filters to capture the varied colors in a scene with a single sensor chip. Reconstruction of a full color image from such a color mosaic is what constitutes demosaicing. In this paper, a technique is proposed that performs this demosaicing in a way that incurs a very low computational cost. This is done through a (dual-tree complex) wavelet interpretation of the demosaicing problem. By using a novel locally adaptive approach for demosaicing (complex) wavelet coefficients, we show that many of the common demosaicing artifacts can be avoided in an efficient way. Results demonstrate that the proposed method is competitive with respect to the current state of the art, but incurs a lower computational cost. The wavelet approach also allows for computationally effective denoising or deblurring approaches.
机译:大多数数码相机使用一个交替的滤色镜阵列,以单个传感器芯片捕获场景中的各种颜色。从这样的彩色马赛克重建全彩色图像就是去马赛克。在本文中,提出了一种以降低计算成本的方式执行去马赛克的技术。通过对去马赛克问题的(双树复数)小波解释来完成。通过使用新颖的局部自适应方法进行去马赛克(复数)小波系数,我们表明可以有效地避免许多常见的去马赛克伪像。结果表明,所提出的方法相对于当前技术水平是有竞争力的,但是产生了较低的计算成本。小波方法还允许计算有效的降噪或去模糊方法。

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