Wireless Capsule Endoscope System And The Research For The Deblurring Of Endoscope Image

A wireless capsule endoscope could capture the images of the entire alimentary tract thus extending the vision of the diagnosing greatly. It could work in the digestive tract non-invasively and lighten the discomfort of patient. Swallowed by patients and then moved forward by a squirm of the gastrointestinal tract, the capsule endoscope can take photos for the entire alimentary tract until it is drained out of the body. Those are the weaknesses of a traditional wire endoscope. It is very important for health care area and the diagnoses of the alimentary tract illnesses to research the wireless endoscope system and its relative image processing technology.At the present time, primary researches pay more attention to the research on the system structure and the development of the special IC chips for the application rather than the blurred image and their restoration which produced by a variety of reasons during the work process. There are certain prominent phenomena in its clinical application. The cost of a capsule endoscope system containing special IC chips is very high and so the diagnoses cost also is very expensive. Another issue is the blur phenomenon occurs frequently for some endoscope images, but we are not able to control the pose or position of the capsule in the body or control it back to the blurred area to take photos again in the current technological conditions. The more blur the picture, the less the information provided for doctor to diagnose. It would seriously impact the clinical application future of the capsule endoscope. The main goal is to research lower cost and simpler structure wireless capsule endoscope and the restoration of the blurred endoscope image.The main contents and contributions of this paper are summarized as follows:1. The evolution and actuality of similar wireless capsule endoscope systems are thoroughly researched. The system overall scheme was designed based on these structures of both home and abroad. The main technical problems in the process of design and realization of this system are analyzed. A prototype capsule endoscope system was made. 2. Analyzing the optical principles of the space-invariant blur image in the alimentary tract and their characters in the frequency domain. Taking account of the characters of the endoscope image, this paper discusses the limitations of some estimation methods for the blur parameters and presents the correlation coefficient algorithm and the cepstrum algorithm to analyze the blurred image. The both methods could adapt well to the defocus and the motion blur simultaneously. An auto-classifying way is presented to delimitate both blur models. Furthermore, the combined blur model by both blur models also could be identified by an effective algorithm.3. Analyzing the optical principles of the space-variant blur image in the alimentary tract and paying attention to the estimation and restoration issue of the defocus model. It is still a difficult area to research the space-variant blur image includes not only the blur parameters identifying mission but also the restoration. This paper analyzes the limitation of the current popular parameter estimation methods for the space-variant blur image and then presents an interactive algorithm to estimate the space-variant blur parameter and to restore. The Error-Parameter analysis is improved to be applied to the identifying mission. Interactive modifying the auto analysis result according to the experience and the prior information or the information judged by people's perception. According to the result by the interactive identifying process, a restoration experiment for a space-variant defocused blur endoscope image is introduced.Although a non-invasive gastrointestinal inspecting system has been developed by the author, there still exists much research work to be done to make the system suitable for clinical applications. At the latter of this paper, a summary for all the research is presented and the future works for the project are introduced.