Lg Electronics Inc.

Video Enhancement Solutions LLC

Korea Advanced Institute of Science and Technology

Kyungpook National University Industry-academic Cooperation Foundation

Hyun Mun Kim

Young Su Lee

Jong Beom Ra

Sung Deuk Kim

Jun Young Kim

Hyun Deok Kim

Min Kyu Je

Shin Yoon Kim

Anna Seo

Byung Cheol Song

A surgical navigation system according to one embodiment may comprise: an electromagnetic wave generation unit; a first detection unit attached to a surgical site of an object to detect a position attached to the surgical site; a second detection unit installed in a patient-specific surgical guide instrument inserted into the surgical site to receive the electromagnetic wave and detect the position of the patient-specific surgical guide instrument; a third detection unit installed in the surgical instrument inserted into the surgical site to detect the position of the surgical instrument; an information processing unit for registering the position of the first detection unit and the position of the third detection unit and for tracking the position of the surgical instrument on the basis of the position of the first detection unit attached to the surgical site, by setting the position of the patient-specific surgical guide instrument as a reference position when the patient-specific surgical guide instrument is inserted into the surgical site; and a display unit for displaying information including the positions of the object and the patient-specific surgical guide instrument and the position of the surgical instrument.

Surgical navigation system

A method of coding a moving picture is provided that reduces blocking artifacts. The method can include defining a plurality of defining pixels S, S, and S, which are centered around a block boundary. If a default mode is selected then frequency information of the surroundings of the block boundary is obtained. A magnitude of a discontinuous component in a frequency domain belonging to the block boundary is adjusted based on a magnitude of a corresponding discontinuous component selected from a pixel contained entirely within a block adjacent the block boundary. The frequency domain adjustment is then applied to a spatial domain. Or, a DC offset mode can be selected to reduce blocking artifacts in smooth regions where there is little motion.

Method of reducing a blocking artifact when coding moving picture

A method of coding a moving picture reduces blocking artifacts. The method includes defining pixel sets S0, S1, S2 around a block boundary, selectively determining a deblocking mode as a default mode or a DC offset mode depending on the degree of blocking artifacts. If the default mode is selected, frequency information is obtained around the block boundary per pixel using a 4-point DCT kernel, for example, a magnitude of a discontinuous component belonging to the block boundary is replaced with a minimum magnitude of discontinuous components belonging to the surroundings of the block boundary in the frequency domain and the replacing step is applied to the spatial domain. If the DC offset mode is selected and a determination is made to perform DC offset mode, the blocking artifacts in a smooth region are removed in the DC offset mode.

Method of removing blocking artifacts in a coding system of a moving picture

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Rockville, MD, United States of America

Hyun Mun Kim