Colour-reproduction algorithm for transmitting variable video frames and its application to capsule endoscopy

Healthcare Technology Letters

article

Tareq Khan¹  Ravi Shrestha¹  Md. Shamin Imtiaz¹  Khan A. Wahid¹ 

[1] Department of Electrical and Computer Engineering, University of Saskatchewan

关键词: endoscopes;    biomedical optical imaging;    medical image processing;    image colour analysis;    image sequences;    colour-reproduction algorithm;    wireless capsule endoscopy;    dictionary-based colour generation scheme;    grey-scale frames;    gastrointestinal diagnosis;    human intestine;    colour image data transmission;    variable video frame transmission;    video sequence;    colour similarity;   

DOI  :  10.1049/htl.2014.0086

学科分类：肠胃与肝脏病学

来源: Wiley

【 摘 要 】

Presented is a new power-efficient colour generation algorithm for wireless capsule endoscopy (WCE) application. In WCE, transmitting colour image data from the human intestine through radio frequency (RF) consumes a huge amount of power. The conventional way is to transmit all R , G and B components of all frames. Using the proposed dictionary-based colour generation scheme, instead of sending all R , G and B frames, first one colour frame is sent followed by a series of grey-scale frames. At the receiver end, the colour information is extracted from the colour frame and then added to colourise the grey-scale frames. After a certain number of grey-scale frames, another colour frame is sent followed by the same number of grey-scale frames. This process is repeated until the end of the video sequence to maintain the colour similarity. As a result, over 50% of RF transmission power can be saved using the proposed scheme, which will eventually lead to a battery life extension of the capsule by 4–7 h. The reproduced colour images have been evaluated both statistically and subjectively by professional gastroenterologists. The algorithm is finally implemented using a WCE prototype and the performance is validated using an ex-vivo trial.

【 授权许可】

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