title: Colour-reproduction algorithm for transmitting variable video frames and its application to capsule endoscopy.
abstract: 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.
authors.affiliation: Department of Electrical and Computer Engineering , University of Saskatchewan , Saskatoon , Saskatchewan S7N5A9 , Canada.
authors.forename: Tareq
authors.initials: T
authors.lastname: Khan
authors.affiliation: Department of Electrical and Computer Engineering , University of Saskatchewan , Saskatoon , Saskatchewan S7N5A9 , Canada.
authors.forename: Ravi
authors.initials: R
authors.lastname: Shrestha
authors.affiliation: Department of Electrical and Computer Engineering , University of Saskatchewan , Saskatoon , Saskatchewan S7N5A9 , Canada.
authors.forename: Md Shamin
authors.initials: MS
authors.lastname: Imtiaz
authors.affiliation: Department of Electrical and Computer Engineering , University of Saskatchewan , Saskatoon , Saskatchewan S7N5A9 , Canada.
authors.forename: Khan A
authors.initials: KA
authors.lastname: Wahid
keywords: biomedical optical imaging; colour image data transmission; colour similarity; colour-reproduction algorithm; dictionary-based colour generation scheme; endoscopes; gastrointestinal diagnosis; grey-scale frames; human intestine; image colour analysis; image sequences; medical image processing; variable video frame transmission; video sequence; wireless capsule endoscopy