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- research-articleJuly 2023
Seeing Photons in Color
ACM Transactions on Graphics (TOG), Volume 42, Issue 4Article No.: 99, Pages 1–16https://doi.org/10.1145/3592438Megapixel single-photon avalanche diode (SPAD) arrays have been developed recently, opening up the possibility of deploying SPADs as generalpurpose passive cameras for photography and computer vision. However, most previous work on SPADs has been limited ...
- research-articleDecember 2016
Channel refined directional color filter array interpolation
ICIIP '16: Proceedings of the 1st International Conference on Intelligent Information ProcessingArticle No.: 49, Pages 1–6https://doi.org/10.1145/3028842.3028891In this paper, our proposed method has two contributions to demosaicking: first, different from conventional interpolation methods based on two directions or four directions, the proposed method exploits to a greater degree correlations among ...
- research-articleDecember 2016
Deep joint demosaicking and denoising
ACM Transactions on Graphics (TOG), Volume 35, Issue 6Article No.: 191, Pages 1–12https://doi.org/10.1145/2980179.2982399Demosaicking and denoising are the key first stages of the digital imaging pipeline but they are also a severely ill-posed problem that infers three color values per pixel from a single noisy measurement. Earlier methods rely on hand-crafted filters or ...
- research-articleAugust 2015
Multidirectional Weighted Interpolation and Refinement Method for Bayer Pattern CFA Demosaicking
IEEE Transactions on Circuits and Systems for Video Technology (IEEETCSVT), Volume 25, Issue 8Pages 1271–1282https://doi.org/10.1109/TCSVT.2014.2313896This paper presents a novel multidirectional weighted interpolation algorithm for color filter array interpolation. Our proposed method has two contributions to demosaicking. First, different from conventional interpolation methods based on two directions ...
- research-articleMay 2015
Penrose Demosaicking
IEEE Transactions on Image Processing (TIP), Volume 24, Issue 5Pages 1672–1684https://doi.org/10.1109/TIP.2015.2409569The 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 ...
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- ArticleDecember 2014
An Evaluation of Debayering Algorithms on GPU for Real-Time Panoramic Video Recording
ISM '14: Proceedings of the 2014 IEEE International Symposium on MultimediaPages 110–115https://doi.org/10.1109/ISM.2014.59Modern video cameras normally only capture a single color per pixel, commonly arranged in a Bayer pattern. This means that we must restore the missing color channels in the image or the video frame in post-processing, a process referred to as ...
- ArticleJuly 2012
An Improved Algorithm for Camera Model Identification Using Inter-channel Demosaicking Traces
IIH-MSP '12: Proceedings of the 2012 Eighth International Conference on Intelligent Information Hiding and Multimedia Signal ProcessingPages 325–330https://doi.org/10.1109/IIH-MSP.2012.85Most CFA (color filter array) interpolation-based digital image forensic methods characterize inter-pixel relationship with a linear model and use the estimated interpolation coefficients as features for image source camera identification. However, ...
- research-articleMarch 2011
A Geometric Method for Optimal Design of Color Filter Arrays
IEEE Transactions on Image Processing (TIP), Volume 20, Issue 3Pages 709–722https://doi.org/10.1109/TIP.2010.2077642A color filter array (CFA) used in a digital camera is a mosaic of spectrally selective filters, which allows only one color component to be sensed at each pixel. The missing two components of each pixel have to be estimated by methods known as ...
- ArticleJanuary 2011
Effective color-difference-based interpolation algorithm for CFA image demosaicking
MMM'11: Proceedings of the 17th international conference on Advances in multimedia modeling - Volume Part IPages 457–469This paper proposes an effective color-difference-based (ECDB) interpolation algorithm for CFA Image demosaicking. A CFA image consists of a set of spectrally selective filters which are arranged in an interleaved pattern such that only one of color ...
- research-articleDecember 2010
Demosaicking and zooming for color filter array via residual image reconstruction
ICIMCS '10: Proceedings of the Second International Conference on Internet Multimedia Computing and ServicePages 139–142https://doi.org/10.1145/1937728.1937761A novel strategy of demosaicking and zooming for Color Filter Array via residual image reconstruction is presented. The proposed scheme depends on certain demosaicking and zooming techniques. Given demosaicking and zooming methods, a residual image ...
- research-articleDecember 2010
Selection of optimal spectral sensitivity functions for color filter arrays
IEEE Transactions on Image Processing (TIP), Volume 19, Issue 12Pages 3190–3203https://doi.org/10.1109/TIP.2010.2051622A color image meant for human consumption can be appropriately displayed only if at least three distinct color channels are present. Typical digital cameras acquire three-color images with only one sensor. A color filter array (CFA) is placed on the ...
- research-articleAugust 2010
Demosaicking by alternating projections: theory and fast one-step implementation
IEEE Transactions on Image Processing (TIP), Volume 19, Issue 8Pages 2085–2098https://doi.org/10.1109/TIP.2010.2045710Color image demosaicking is a key process in the digital imaging pipeline. In this paper, we study a well-known and influential demosaicking algorithm based upon alternating projections (AP), proposed by Gunturk, Altunbasak and Mersereau in 2002. Since ...
- ArticleNovember 2009
A generic variational approach for demosaicking from an arbitrary color filter array
We propose a method to demosaick images acquired with a completely arbitrary color filter array (CFA). We adopt a variational approach where the reconstructed image has maximal smoothness under the constraint of consistency with the measurements. This ...
- ArticleNovember 2009
Joint demosaicking and denoising with space-varying filters
In a digital camera usually images are captured using a Color Filter Array (CFA), requiring a demosaicking process to reconstruct the full resolution color image. Often also a denoising step is necessary to remove the noise introduced by the sensor. In ...
- ArticleNovember 2009
A new color filter array with optimal sensing properties
We propose a new color filter array (CFA) with optimal characteristics for the acquisition of color scenes, since the luminance and chrominance information is encoded in the mosaicked image with the best achievable robustness to aliasing and noise. Our ...
- ArticleNovember 2009
A new random color filter array with good spectral properties
We propose in this work a new random pattern with R,G,B colors, which can be used to design color filter arrays (CFA) with good spectral properties, since the chrominance is modulated at high frequencies. Hence, the demosaicking artifacts appear as ...
- ArticleNovember 2009
A case for denoising before demosaicking color filter array data
Asilomar'09: Proceedings of the 43rd Asilomar conference on Signals, systems and computersPages 860–864Denoising algorithms are well developed for grayscale and color images, but not as well for color filter array (CFA) data. Consequently, the common color imaging pipeline demosaics CFA data before denoising. In this paper we explore the noise-related ...
- research-articleNovember 2009
Efficient Compression for Sampled Color Images
IEEE Transactions on Consumer Electronics (ITOCE), Volume 55, Issue 4Pages 2090–2096https://doi.org/10.1109/TCE.2009.5373773Single image sensors with color filter arrays have been widely used in color imaging systems. In typical applications, sampled color images obtained using a single sensor are first interpolated and then compressed. In this paper, we propose an efficient ...
- research-articleOctober 2009
Regularization approaches to demosaicking
IEEE Transactions on Image Processing (TIP), Volume 18, Issue 10Pages 2209–2220https://doi.org/10.1109/TIP.2009.2025092Demosaicking is the process of reconstructing a full resolution color image from the sampled data acquired by a digital camera that apply a color filter array to a single sensor. In this paper, we propose a regularization approach to demosaicking, ...
- research-articleSeptember 2009
A pixel-based digital photo authentication framework via demosaicking inter-pixel correlation
MM&Sec '09: Proceedings of the 11th ACM workshop on Multimedia and securityPages 125–130https://doi.org/10.1145/1597817.1597839Demosaicked images possess spatially periodic inter-pixel correlation, because interpolation strategies at any logically equivalent spatial pixel location are identical. Taking this statistical characteristic, much research on imaging forensics has been ...