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Fast image drafting method based on depth drawing

A technology of image rendering and depth map, which is applied in image data processing, 2D image generation, instruments, etc. It can solve the problems of cumbersome calibration and time-consuming, and achieve the effects of good production effect, reduced calculation amount, and small distortion

Inactive Publication Date: 2008-09-24
安徽沃孚医疗科技有限公司
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Problems solved by technology

However, such projection and backprojection are computationally expensive and require the parameters of the real camera corresponding to the 2D reference view for the entire rendering process (see "A new approach to stereoscopic television: Depth-map-based rendering , Compression and Transmission", Stereoscopic Displays and Virtual Reality Systems, 2004.C.Fehn, "Depth-Image-Based Rendering (DIBR), Compression and Transmission for a New Approach on 3D-TV," Stereoscopic Displays and Virtual Reality Systems XI, Proceedings of the SPIE, Volume 5291, pp.93-104, 2004)
In practice, a very cumbersome calibration process is required to obtain the parameters of the real camera

Method used

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Embodiment Construction

[0032] A fast image drawing method based on a depth map proposed by the present invention is described in detail in conjunction with the accompanying drawings and embodiments as follows:

[0033] In order to obtain multiple 2D virtual views from different viewpoints, it is necessary to generate each 2D virtual view from different viewpoints according to the 2D reference view and the corresponding depth map. In order to achieve the above object, the workflow of the present invention is as follows: figure 1 Shown, each step is described in detail as follows in conjunction with embodiment:

[0034] Step 1) Pixel shifting:

[0035] All the pixels in the 2D reference view are shifted to the 2D virtual view, and the shift distance is proportional to the depth value in the depth map corresponding to the pixel. The formula is as follows:

[0036] I Virt (x+index*α*(d Ref (x,y)-d 0 ), y, index) = I Ref (x,y)

[0037] Among them, index represents the serial number of the virtua...

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Abstract

The invention relates to a fast image rendering method based on a depth map, belonging to technical field of the computer image rendering. The method comprises the following steps: all pixels in a two-dimensional reference view are shifted to a two-dimensional virtual view; a shifting distance is in proportion to a depth value in the depth map corresponding to the pixel; the quantization noise in the two-dimensional virtual view is measured and removed; an obvious mistake in the two-dimensional virtual view is removed; an unfilled void area in the two-dimensional virtual view is filled with the pixel of a background area. The invention has the advantages of reducing the calculation amount in the entire rendering course greatly, meanwhile no need to regulate the camera, thereby being convenient and easy, obtaining a satisfactory rendering result, thereby being especially suitable for in some situations where a real-time processing is needed or a system resource is very limited.

Description

technical field [0001] The invention belongs to the technical field of computer image drawing, and in particular relates to a fast image drawing method based on a depth map. Background technique [0002] In a multi-view auto-stereoscopic display system (Multi-view Auto-stereoscopic System), to generate a three-dimensional view with a stereoscopic effect, multiple two-dimensional virtual views from different viewpoints are required. The image rendering technology based on the depth map can draw multiple 2D virtual views from different viewpoints according to a 2D reference view and a depth map corresponding to the reference view. Compared with other methods, it has the following advantages: [0003] 1. The image-plus-depth format can be encoded more efficiently, thus requiring less bandwidth for transmission; [0004] 2. The image plus depth format can be independent of specific autostereoscopic displays, such as autostereoscopic displays with eight or nine viewing angles, s...

Claims

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Application Information

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IPC IPC(8): G06T11/00
Inventor 戴琼海徐秀兵
Owner 安徽沃孚医疗科技有限公司
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