Fractional Wavelet Filter for Camera Sensor Node with external Flash and extremely little RAM

Stephan Rein; Stephan Lehmann; Clemens Gühmann

4th International ICST Mobile Multimedia Communications Conference

Research Article

Fractional Wavelet Filter for Camera Sensor Node with external Flash and extremely little RAM

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Cite: BibTeX Plain Text

@INPROCEEDINGS{10.4108/ICST.MOBIMEDIA2008.4026,
    author={Stephan Rein and Stephan Lehmann and Clemens G\'{y}hmann},
    title={Fractional Wavelet Filter for Camera Sensor Node with external Flash and extremely little RAM},
    proceedings={4th International ICST Mobile Multimedia Communications Conference},
    publisher={ICST},
    proceedings_a={MOBIMEDIA},
    year={2010},
    month={5},
    keywords={Fractional wavelet filter Camera sensor node Flash memory},
    doi={10.4108/ICST.MOBIMEDIA2008.4026}
}

Stephan Rein
Stephan Lehmann
Clemens Gühmann
Year: 2010
Fractional Wavelet Filter for Camera Sensor Node with external Flash and extremely little RAM
MOBIMEDIA
ICST
DOI: 10.4108/ICST.MOBIMEDIA2008.4026

Stephan Rein¹^,*, Stephan Lehmann¹^,*, Clemens Gühmann¹^,*

1: Wavelet Application Group, Department of Energy and Automation Technology, Chair of Electronic Measurement and Diagnostic Technology, Technische Universität Berlin.

*Contact email: stephan.rein@tu-berlin.de, stephan.lehmann@tu-berlin.de, clemens.guehmann@tu-berlin.de

Abstract

This paper introduces the fractional wavelet filter as a technique to compute fractional values of each wavelet subband, thus allowing a low-cost camera sensor node with less than 2 kByte RAM to perform a multi-level 9/7 picture wavelet transform. The picture dimension can be 256x256 using fixed-point arithmetic and 128x128 using floating-point arithmetic. The technique is applied to a typical 16 Bit sensor node architecture with external flash memory, which allows to line-wisely read and write picture data.

Keywords: Fractional wavelet filter Camera sensor node Flash memory

Published: 2010-05-16
Publisher: ICST
Modified: 2010-05-16

: http://dx.doi.org/10.4108/ICST.MOBIMEDIA2008.4026

Fractional Wavelet Filter for Camera Sensor Node with external Flash and extremely little RAM

Abstract

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