| Summary: | 碩士 === 國立中正大學 === 電機工程研究所 === 106 === Endoscopes are used for a wide range of purposes. The endoscope is mainly composed of a light source and a lens. Endoscopes are often used for examinations inside the body, such as the large intestine, stomach, etc. In addition to in vivo examination of the human body, minimally invasive surgery is also an endoscope-related application. Compared with the traditional surgery, minimally invasive surgery has the advantages of small wound and quick recovery. Minimally invasive surgery is performed through an endoscope. The light source and lens of the endoscope can be used to display the current situation from a monitor. The physician can treat or observe through the endoscope.
Since the surface of the internal organs is full of water, when the endoscope is used, the light source will have water reflection when it hits the surface of the organ. We call it Specular reflection. This Specular reflection will affect the doctor's diagnosis. This can cause shadowing to the organs. But most of the current literature focuses on the use of Inpainting. The method is to use the surrounding information to fill the Specular reflection. The result of this method is not the actual situation on the surface of the organ, and it is difficult for the doctor to believe.
This paper uses a background Sprite model to reconstruct the Specular reflection.
First, the Specular reflection will be detected and marked first. Next, we will calculate the Global motion estimation(GME) parameter. Integrate the endoscope image into the background Sprite model and form a progressive background Sprite model. Finally, get information from the momentary background Sprite model and reconstruct the Specular reflection.
The experiment result shows, this paper can effectively reconstruct the specular reflection and reconstructive result is actually the surface of the organ. However, the specular reflection of the endoscope image is not homogeneous, the effect of reconstruction can be strengthened.
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