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Method and its device for real scene space structure of secondary concave curve surface reflective imagining

A construction method and imaging device technology, applied in the field of optical imaging, can solve problems such as unnatural and realistic visual effects, high cost of fisheye lenses, and difficulty in obtaining model parameters, etc., and achieve good imaging visual effects, smooth changes, and low cost.

Inactive Publication Date: 2006-01-04
NAT UNIV OF DEFENSE TECH
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  • Description
  • Claims
  • Application Information

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Problems solved by technology

But its disadvantages are: in general, it is difficult to obtain the model parameters of a specific fisheye perspective lens, and it is impossible to accurately calculate the projection transformation of fisheye images. If approximate calculations are used, the final visual effect is not natural and realistic; in addition, the cost of fisheye lenses is very high. High, if you customize the fisheye lens with specified model parameters, the cost will be even higher

Method used

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  • Method and its device for real scene space structure of secondary concave curve surface reflective imagining
  • Method and its device for real scene space structure of secondary concave curve surface reflective imagining
  • Method and its device for real scene space structure of secondary concave curve surface reflective imagining

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Embodiment 1

[0035] Embodiment 1: The specific process, steps and formulas of projection transformation calculation are demonstrated below by taking a conical reflective surface, a telecentric lens combined with a cylindrical real scene space model as an example.

[0036] Projective transformation is divided into four steps:

[0037] 1. Map the pixels on the image plane captured by the camera to the side surface of the cone;

[0038] 2. Map the pixel points on the side surface of the cone to the side surface of the cylinder;

[0039] 3. Vertically cut the side surface of the cylinder and expand it into a plane, so that the pixels on the cylinder surface are stored in the form of two-dimensional coordinates;

[0040] 4. Carry out back projection transformation from the cylindrical real scene image, and reconstruct the human eye field image corresponding to each line of sight direction in the cylindrical space.

[0041] Such as Figure 4 and Figure 5 As shown, assume that the perspectiv...

Embodiment 2

[0057] Example 2: Although there are many combination modes, practice has proved that the imaging effect of using parabolic reflective surfaces, hyperboloids and traditional perspective lenses is better, and although different combinations have differences in calculation details, the calculation ideas and processes are the same . In the following, only the special case of the combination of parabolic reflective surface, traditional perspective lens and cylindrical model is given, and the practical projection transformation formula is given, and the transformation process is ignored.

[0058] Such as Figure 6 and Figure 7 As shown, A is the viewpoint, O is the origin of the three-dimensional coordinates, C is the bottom focus of the camera, and the paraboloid equation is y=ax 2 +b, the radius of the base of the paraboloid is r, AO=h, OC=l, the focal length is f, the distance from point O to the bottom of the cylinder is k, the width of the film is w, and the height is H. S...

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Abstract

First, the imaged scene forms the reflected image in the reflected imaging surface of the secondary convex lens; then, the light axis of the imaging lens is aligned to the center of reflected imaging surface of the secondary convex lens and the focus length of the secondary convex lens is regulated to make the reflected image in the imaging surface of the secondary convex lens imaged clearly with the imaging lens. Based on optical principle, all the pixels of the reflected image are projecting converted and calculated to find out corresponding to pixel points in virtual real scene space model, so as to create real scene image essential for constituting virtual real scene space model. The device includes secondary convex lens, imaging lens, photosensing imaging device and computer, and the imaging lens light axis is superposed with central line of the reflecting imaging surface of the secondary convex lens. The present invention can form digital real scene image fast and automatically.

Description

technical field [0001] The present invention mainly relates to the field of optical imaging, in particular to a kind of reflective imaging principle using a highly smooth quadratic convex surface with good reflective performance to quickly and automatically construct a digital real scene space, and then reproduce and provide users with natural browsing according to human visual habits. Real-scene space construction method and device for quadratic convex surface reflection imaging. Background technique [0002] The wide field of view digital real scene space system with 360-degree omnidirectional roaming and browsing has broad application prospects in security monitoring, virtual tourism, education and entertainment, and military fields. Its core is based on the real image / video data collected by cameras / cameras Above, the 360-degree digital real-scene space model and corresponding image data established after computer processing. The existing technology is to use the digita...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B27/22G02B13/18H04N17/00G06T15/00
Inventor 张茂军徐玮王炜曹宗胜张军包卫东高辉武德峰马力赵亮李国辉图丹甘亚莉熊志辉
Owner NAT UNIV OF DEFENSE TECH