Image compression in video radio transmission for capsule endoscopy

Turgis, David; Puers, Robert

doi:10.1016/j.sna.2005.05.016

Cited by 49 publications

(33 citation statements)

References 5 publications

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“…The capsule acquisition rate was 5Hz with a frame resolution of 256×256 pixels. Motion JPEG has been set as benchmark, since this codec is used in current capsule endoscopes [2]. For a fair comparison, Motion JPEG has also been used to code the key frames and the WZ hash in the proposed codec.…”

Section: Resultsmentioning

confidence: 99%

“…Current capsule video chips employ conventional coding schemes operating in the low-complexity, intraframe mode, i.e., Motion JPEG [2]. Anchored in distributed source coding (DSC) fundamentals [3], a strong candidate to fulfill the aforementioned demands is DVC [4], a reverse paradigm enabling separate encoding and joint decoding of video signals.…”

Section: Introductionmentioning

confidence: 99%

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Distributed coding of endoscopic video

Deligiannis

Verbist

Barbarien

et al. 2011

2011 18th IEEE International Conference on Image Processing

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Triggered by the challenging prerequisites of wireless capsule endoscopic video technology, this paper presents a novel distributed video coding (DVC) scheme, which employs an original hash-based side-information creation method at the decoder. In contrast to existing DVC schemes, the proposed codec generates high quality side-information at the decoder, even under the strenuous motion conditions encountered in endoscopic video. Performance evaluation using broad endoscopic video material shows that the proposed approach brings notable and consistent compression gains over various state-of-the-art video codecs at the additional benefit of vastly reduced encoding complexity.Index Terms-Video capsule endoscopy, distributed video coding, hash-driven overlapped block motion estimation.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Distributed coding of endoscopic video

Deligiannis

Verbist

Barbarien

et al. 2011

2011 18th IEEE International Conference on Image Processing

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“…Contemporary capsule video chips employ conventional coding schemes operating in a low-complexity, intra-frame mode, i.e., Motion JPEG [34], or even no compression at all. Current capsule endoscopic video systems operate at modest frame resolutions, e.g., 256 × 256 pixels, and frame rates, e.g., 2-5 Hz, on a battery life time of approximately 7 h. Future generations of capsule endoscopes are intended to transmit at increased resolution, frame rate, and battery life time and will therefore require efficient video compression at a computational cost as low as possible.…”

Section: Wireless Capsule Endoscopymentioning

confidence: 99%

“…In the set of experiments comprising capsule endoscopic video content, Motion JPEG has been set as benchmark, since this technology is commonly employed in up-to-date capsule endoscopes [34]. To enable a fair comparison, Motion JPEG has also been employed to code the key and the hash frames in the proposed codec.…”

Section: Evaluation On Endoscopic Video Sequencesmentioning

confidence: 99%

Wyner-Ziv video coding for wireless lightweight multimedia applications

Deligiannis

Verbist

Iossifides

et al. 2012

J Wireless Com Network

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Wireless video communications promote promising opportunities involving commercial applications on a grand scale as well as highly specialized niche markets. In this regard, the design of efficient video coding systems, meeting such key requirements as low power, mobility and low complexity, is a challenging problem. The solution can be found in fundamental information theoretic results, which gave rise to the distributed video coding (DVC) paradigm, under which lightweight video encoding schemes can be engineered. This article presents a new hashbased DVC architecture incorporating a novel motion-compensated multi-hypothesis prediction technique. The presented method is able to adapt to the regional variations in temporal correlation in a frame. The proposed codec enables scalable Wyner-Ziv video coding and provides state-of-the-art distributed video compression performance. The key novelty of this article is the expansion of the application domain of DVC from conventional video material to medical imaging. Wireless capsule endoscopy in particular, which is essentially wireless video recording in a pill, is proven to be an important application field. The low complexity encoding characteristics, the ability of the novel motion-compensated multi-hypothesis prediction technique to adapt to regional degrees of temporal correlation (which is of crucial importance in the context of endoscopic video content), and the high compression performance make the proposed distributed video codec a strong candidate for future lightweight (medical) imaging applications.

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“…It has been already reported in literature [2], [3] that the endoscopic capsule can approximately reach only one megabit per second transmission bitrate due to limitation of power consumption and severe attenuation of radio waves in a human body. Because the CMOS sensor having VGA resolution (640×480 pixels) delivers 2.45×10 6 bits per image, it is obvious that without data compression transmission of one image would last more than 2 seconds spending quite a lot of energy.…”

Section: Introductionmentioning

confidence: 99%

Hardware Implementation Aspects of New Low Complexity Image Coding Algorithm for Wireless Capsule Endoscopy

Turcza

Zieliński

Duplaga

2008

Computational Science – ICCS 2008

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Abstract. The paper presents hardware implementation aspects of new efficient image compression algorithm designed for wireless capsule endoscopy with Bayer color filter array (CFA). Since power limitation, small size conditions and specific image data format (CFA) exclude application of traditional image compression techniques dedicated ones are necessary. Discussed algorithm is based on integer version of discrete cosine transform (DCT). Therefore it has low complexity and power consumption. It is demonstrated that the performance of proposed algorithm is comparable to the performance of JPEG2000 -very complex, sophisticated wavelet based coder. In the paper a VLSI coder architecture is proposed and power requirements are discussed.

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Image compression in video radio transmission for capsule endoscopy

Cited by 49 publications

References 5 publications

Distributed coding of endoscopic video

Distributed coding of endoscopic video

Wyner-Ziv video coding for wireless lightweight multimedia applications

Hardware Implementation Aspects of New Low Complexity Image Coding Algorithm for Wireless Capsule Endoscopy

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