Open AccessColour‐reproduction algorithm for transmitting variable video frames and its application to capsule endoscopy
Author(s) -
Khan Tareq,
Shrestha Ravi,
Imtiaz Md. Shamin,
Wahid Khan A.
Publication year - 2015
Publication title -
healthcare technology letters
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.45
H-Index - 19
ISSN - 2053-3713
DOI - 10.1049/htl.2014.0086
Subject(s) - computer science , frame (networking) , computer vision , artificial intelligence , similarity (geometry) , scale (ratio) , image (mathematics) , telecommunications , physics , quantum mechanics
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.