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Three-dimensional modeling method for eyeball

A three-dimensional modeling and eyeball technology, applied in the field of three-dimensional modeling, can solve problems such as deformation of scanned images, and achieve the effects of easy implementation, realistic reconstruction effects, and simple algorithms

Active Publication Date: 2013-10-09
珠海金联安警用技术研究发展中心有限公司
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Problems solved by technology

[0005] In modern ophthalmic 3D imaging, many use 3D ultrasound technology, which has the following disadvantages: The scanning time of the B-ultrasound probe is about 5-15s. During this period, the detection target moves relative to the probe, which will cause the scanning image to be deformed or defective. , called motion artifacts

Method used

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  • Three-dimensional modeling method for eyeball
  • Three-dimensional modeling method for eyeball
  • Three-dimensional modeling method for eyeball

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Embodiment Construction

[0024] like figure 1 Shown, a kind of three-dimensional modeling method of eyeball, this method comprises:

[0025] Step 1: Obtain multiple groups of fundus images of the eyeball through a single camera, and the images respectively describe the state of each angle of eyeball rotation. like figure 2 As shown, using eyeball rotation to generate continuous fundus two-dimensional image data, an image sequence is generated, such as image 3 shown.

[0026] Step 2, camera calibration is to establish an imaging model, determine the position and attribute parameters of the camera, and determine the correspondence between the object point and its image point in the space coordinate system. The calibration method of the camera is to fit through the least squares method to determine the transformation matrix of the three-dimensional space point mapping to the two-dimensional image point. An effective camera model, in addition to accurately recovering the three-dimensional informatio...

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Abstract

The invention relates to a three-dimensional modeling method for an eyeball. The method comprises the following steps of: acquiring images, calibrating a camera, extracting (identifying) features, matching the features, determining depth information, performing post processing on three-dimensional images and the like. The method particularly comprises the following steps of: 1, acquiring a plurality of groups of eyeball and eyebase images through a single camera: describing all the angle states of eyeball rotation respectively; 2, calibrating the camera: determining the position and the attribute parameter of the camera, and determining the corresponding relationship between an object point in a space coordinate system and an image point of the object point; 3, extracting the features and identifying the features; 4, calculating according to the selected features; 5, acquiring parallax images, and determining depth images and recovering scene 3D information; and 6, performing depth interpolation, error correction and precise improvement on the recovered scene. By the method, three-dimensional reestablishment is performed on an eyeball image sequence, the reestablishment effect is vivid, the speed is higher, and the stereoscopic impression of the images is strong. The method has the characteristics that: the method has a simple algorithm, is easy to implement, and the like.

Description

technical field [0001] The invention relates to a three-dimensional modeling method, in particular to a three-dimensional modeling method for generating a three-dimensional image of an eyeball. Background technique [0002] With the continuous development of medical science and technology and the accumulation of experience, X-ray plain film, ultrasound, CT, MRI and other imaging examination methods have been successively introduced into the diagnosis of eye diseases. The development of medical image visualization technology algorithms starts from basic image processing algorithms such as Fourier transform and convolution back projection, to MPR (multi-planar reformation, multi-level reconstruction), MTP (maximum intensity projection, maximum density projection method), to surface rendering and volumetric projection. painted. [0003] MPR is to rearrange the collected three-dimensional data (also known as voxel, Voxel) to display the section in any direction. And MIP is to ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06T17/00
Inventor 肖斌刘伟赵永兵
Owner 珠海金联安警用技术研究发展中心有限公司
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