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Sight glass visual angle tracking method based on image transformation matrix

A transformation matrix and speculum technology, which is applied in image data processing, 3D modeling, instruments, etc., can solve the problems that the virtual scalpel cannot be changed, achieve the effect of accurate virtual surgery process, improve the degree of realism, and improve the training effect

Active Publication Date: 2013-09-04
ZHEJIANG UNIV OF TECH
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Problems solved by technology

The observation angle of the current surgical training system is mostly specified by the user and cannot be changed with the movement of the virtual scalpel

Method used

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  • Sight glass visual angle tracking method based on image transformation matrix
  • Sight glass visual angle tracking method based on image transformation matrix
  • Sight glass visual angle tracking method based on image transformation matrix

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Embodiment Construction

[0030] The present invention will be described in further detail below in conjunction with accompanying drawing:

[0031] Refer to attached Figure 1-3 ,

[0032] A method for tracking the angle of view of a looking glass based on a graph transformation matrix, mainly comprising the following three steps:

[0033] Step 1, obtain the spatial parameters of the digital scalpel in the virtual space:

[0034] The spatial parameters include camera position (Position), camera focus (Focus Point) and upward direction (View Up). The camera position is the position of the virtual camera point on the digital scalpel, simulating the position of the camera in real surgery ; The camera focus is the focus position of the viewing angle, which is mainly used to form the line of sight vector together with the camera position; the upward direction is the positive direction of the y-axis of the viewing plane; by establishing a virtual space in the computer and setting a coordinate axis for the ...

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Abstract

The invention discloses a sight glass visual angle tracking method based on an image transformation matrix, and belongs to the field of computer graphics in the information technical field. Sight glass visual angles of a scalpel can be displayed in a virtual surgery training system. An algorithm based on the image transformation matrix is provided. A visual angle which can move along with a knife in the virtual surgery training system can be constructed by changing space coordinate positions of several fixed points, and therefore the effects of the sight glass visual angles can be achieved. According to the sight glass visual angle tracking method based on the image transformation matrix, absolute variables are adopted, accumulative errors of data collected in a knife moving process are reduced, steady state errors are eliminated through calibration in initialization, meanwhile, the visual angle can be in linkage with multiple machines, relative operations in a true surgery are completely restored, calculation quantity is small, and disturbance resisting capacity is good.

Description

technical field [0001] The invention relates to the field of computer graphics under the field of information technology. Background technique [0002] Neurosurgery is currently an important means of treating neurosurgical diseases, but due to the complex structure of brain organs and the proximity of some lesions to important tissues and organs, neurosurgery is complex and challenging. Therefore, it is of great significance to accurately display brain structural information such as brain functional areas and nerve fiber direction, and provide a high-fidelity surgical training system to improve the level of brain neurosurgery. [0003] The current domestic and foreign surgical training system research has made some progress, such as the United States Intuitive Surgical successfully developed the Da Vinci surgical robot system, and has been put into commercial use; Harvard Medical School Surgical Planning Laboratory Peter C.Everett et al. The software system developed by peo...

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Application Information

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IPC IPC(8): G06T17/00G06T19/00
Inventor 刘衍志白雪琛冯远静禹鑫燚叶峰陈蒙奇洪凌郭冰冰
Owner ZHEJIANG UNIV OF TECH
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