Volume rendering method for diamond pixel arrangement
A technology of pixel arrangement and volume rendering, applied in the field of volume rendering, can solve the problems of time-consuming and increasing system overhead, etc., and achieve the effect of improving the effect, improving the display effect, and improving the rendering efficiency
Active Publication Date: 2021-09-17
NORTHEASTERN UNIV
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Problems solved by technology
The role of 3D volume rendering is to project and display the discretely distributed 3D data field on a 2D screen. However, sampling calculation and image synthesis in volume rendering are very time-consuming, and the computational overhead of both is proportional to the total number of sampling points.
[0004] The space jump method based on volume data coding can effectively improve the computational efficiency of the volume rendering process and reduce the rendering time, but at the same time, it needs to save the coding information and increase additional system overhead, and the coding depends on the transfer function information. When the transfer function changes , it is necessary to re-adjust the encoding to ensure effective drawing results
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[0038] In order to better explain the present invention and facilitate understanding, the present invention will be described in detail below through specific embodiments in conjunction with the accompanying drawings.
[0039] like figure 1 and Figure 5 As shown: the present embodiment provides a volume rendering method of rhombus pixel arrangement, which specifically includes the following steps:
[0040] S1. Using the ray projection method to project the three-dimensional data field to obtain the projected imaging plane;
[0041] S2. Rotate the projection imaging plane by 45 degrees around its normal vector direction to obtain a rhombus projection plane space;
[0042] S3. Convert the rhombus-arranged pixels in the projected plane space into square-arranged pixels to obtain a final rendered image.
[0043] like figure 2 Shown: step S1 described in this embodiment also includes:
[0044] Starting from each pixel point f(x, y) in the image space, project multiple rays a...
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The invention relates to a volume rendering method for rhombic pixel arrangement. The method comprises the following steps: S1, projecting a three-dimensional data field by adopting a ray casting method to obtain a projection imaging plane; S2, rotating the projection imaging plane by 45 degrees around the normal vector direction of the projection imaging plane, and obtaining a rhombic projection plane space; and S3, converting the pixels arranged in a rhombus shape in the projection plane space into pixels arranged in a square shape to obtain a final drawn image. According to the volume rendering method for diamond pixel arrangement provided by the invention, the effect can be greatly improved under the same resolution ratio through a volume rendering acceleration rendering scheme for improving the display effect in a pixel arrangement mode, so that in the volume rendering application, on the premise of ensuring the rendering precision, the rendering efficiency is improved by reducing the rendering resolution ratio.
Description
technical field [0001] The invention belongs to the technical field of volume rendering, and in particular relates to a volume rendering method for rhombus pixel arrangement. Background technique [0002] Volume rendering is one of the core algorithms to realize the visualization of 3D data field. It can directly and effectively display the physical phenomena inside the data field, and has a very strong expressive power. The role of 3D volume rendering is to project and display the discretely distributed 3D data field on a 2D screen. However, sampling calculation and image synthesis in volume rendering are very time-consuming, and the computational overhead of both is proportional to the total number of sampling points. . [0003] Algorithms for accelerating volume rendering currently mostly adopt the method of jumping volume data space. In the process of light propagation, by encoding the data field, the background and the invisible area for a specific transfer function ar...
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IPC IPC(8): G06T15/08
CPCG06T15/08Y02D10/00
Inventor 周庆华覃文军于鲲张子明杨金柱赵大哲
Owner NORTHEASTERN UNIV