A Low-Cost Imaging Method to Avoid Hand Shake Blur for Cell Phone Cameras

Luo, Lei; Chong, Jong‐Wha

doi:10.1587/transinf.e95.d.1702

Cited by 2 publications

(2 citation statements)

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“…Quality issues, such as blurring and noise, are generated due to the decrease in the photodiode area [1], especially in low luminance environments. In contrast to conventional post-processingbased image enhancement methods [2], [3], Color Filter Array (CFA)-based approaches directly address these issues using high-sensitivity sensors, and thus have become increasingly popular with consumer electronics manufacturers [4].…”

Section: Introductionmentioning

confidence: 99%

An Improved White-RGB Color Filter Array Based CMOS Imaging System for Cell Phones in Low-Light Environments

Wang

Chong

2014

IEICE Trans. Inf. & Syst.

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SUMMARYIn this paper, a novel White-RGB (WRGB) color filter array-based imaging system for cell phone is presented to reduce noise and reproduce color in low illumination. The core process is based on adaptive diagonal color separation to recover color components from a white signal using diagonal reference blocks and location-based color ratio estimation in the luminance space. The experiments, which are compared with the RGB and state-of-the-art WRGB approaches, show that our imaging system performs well for various spatial frequency images and color restoration in low-light environments.

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Section: Introductionmentioning

confidence: 99%

An Improved White-RGB Color Filter Array Based CMOS Imaging System for Cell Phones in Low-Light Environments

Wang

Chong

2014

IEICE Trans. Inf. & Syst.

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“…2 However, sensitivity is a main weakness of complementary metal oxide semiconductor (CMOS) sensors. 4,5 In contrast to conventional postprocessing-based image enhancement methods, color filter array (CFA)-based approaches directly address these issues using high-sensitivity sensors and, thus, have become increasingly popular with consumer electronics manufacturers. 3 Quality issues, such as blurring and noise, are generated due to the decrease in the photodiode area.…”

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confidence: 99%

Improved nonlocal fuzzy color segmentation-based color reconstruction hybrid approach for white-RGB imaging systems

Wang

Chong

2014

J. Electron. Imaging

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Conventional local-based color reconstruction for a white-RGB (WRGB) imaging system relies excessively on reference pixels. Therefore, it is sensitive to noisy interference. To address this issue, we propose an improved nonlocal fuzzy color segmentation-based color reconstruction hybrid approach for a WRGB imaging system. Unlike local-based approaches, we attempt to reproduce color information based on the statistical color distribution of the raw sensor data. According to the distribution analysis, the color distribution (histogram and cumulative distribution function) is close to that of the full-resolution image. However, brief histogram matching gives rise to zipper artifacts, which result from the multicombination of the red, green, and blue corresponding to one white. Therefore, a hybrid color segmentation is proposed to address this issue. The first step is a brief sorting-based color segmentation in the hue channel. Fuzzy-based color segmentation is then utilized to acquire more subregions in the proposed saturation space. Finally, fast histogram matching is carried out to obtain the full-color information for the white pixel for each region. Compared with state-of-the-art approaches, the proposed nonlocal hybrid approach is capable of significantly reducing the influence of noise with higher peak signal-to-noise ratios. Furthermore, according to the hybrid color segmentation, zipper artifacts are successfully avoided. Downloaded From: http://electronicimaging.spiedigitallibrary.org/ on 05/15/2015 Terms of Use: http://spiedl.org/terms Journal of Electronic Imaging 063008-7 Nov∕Dec 2014 • Vol. 23(6) Wang and Chong: Improved nonlocal fuzzy color segmentation-based color reconstruction hybrid approach. . . Downloaded From: http://electronicimaging.spiedigitallibrary.org/ on 05/15/2015 Terms of Use: http://spiedl.org/terms Chang-shuai Wang received his BS degree in communication engineering from Harbin Wang and Chong: Improved nonlocal fuzzy color segmentation-based color reconstruction hybrid approach. . . Downloaded From: http://electronicimaging.spiedigitallibrary.org/ on 05/15/2015 Terms of Use: http://spiedl.org/terms

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A Low-Cost Imaging Method to Avoid Hand Shake Blur for Cell Phone Cameras

Cited by 2 publications

References 6 publications

An Improved White-RGB Color Filter Array Based CMOS Imaging System for Cell Phones in Low-Light Environments

An Improved White-RGB Color Filter Array Based CMOS Imaging System for Cell Phones in Low-Light Environments

Improved nonlocal fuzzy color segmentation-based color reconstruction hybrid approach for white-RGB imaging systems

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