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Hilbert 곡선 Scan 방법을 이용한 의학 영상의 압축 방법에 관한 연구
지영준,박광석 대한의용생체공학회 1993 의공학회지 Vol.14 No.1
For efficient storage and transmission of medical images, the requirement of image com pression is increasing. Because differences between reconstructed images and original images are related with errors In the diagnosis, lossless compression is generally preferred in mod- ical images. in Run Length Coding which is one of the lossless compression method, we have applied modified scanning direction based on the Hilbert curve, which is a kind of space fill ins curve. We have substituted the traditional raster scanning by Hilbert curve direction scanning. Using this method, we have studied enhancement of compression efficiency for medical images.
池永俊 건국대학교 교육대학원 1986 敎育論叢 Vol.6 No.-
The linear group play an important role in the study of geometry. And from the viewpoint of Euclidean geometry the most transformations are those that preserve distances. In this paper we studied some of the geometric and topological properties of Rⁿand proved the followings. 1. Geometric properties (1) If a A ∈0(n) is reflection in a hyperplain H in RⁿB ∈O(n), then BAB^-1 is reflection in the hyper-plane HB^-1, (2) O(n) is generated by reflections. (3) Any isometry is affine. (4) Any isometry can be expressed as the product of at most (n+1) reflections. 2. Topological properties (1) GL (n, R) is homeomorphic to O(n) × T_+(n). (2) I (Rⁿ) is homeomorphic to O(n) ×Rⁿ.
지영준,우지환,Chee, Young-Joon,Woo, Jih-Wan 대한의용생체공학회 2010 의공학회지 Vol.31 No.5
This article presents a review of technologies for an endoscope. The classification according to the clinical applications and the imaging modalities are summarized. The major parts are focused on describing the gastrointestinal endoscope's structures and mechanisms. The details of the image enhanced endoscopic techniques, such as NBI (narrow band imaging), OCT (optical coherence tomography), and EUS (endoscopic ultrasound), are also explained. Finally, the trend of NOTES (natural orifice transluminal endoscopic surgery) which is new fusion technology in the field of endoscopic diagnosis and surgery is introduced.