Method and device for generating two-dimensional images

Abstract

The invention discloses a method and a device for generating two-dimensional images. The method includes: generating a map according to the geometrical shape of a three-dimensional model and a corresponding texture map, wherein the map stores the corresponding relation between the texture map and the geometrical shape of a two-dimensional image projected by the three-dimensional model; and inputting the texture map to render the map so as to generate the two-dimensional image. When the map is generated, the three-dimensional model is projected by a camera model of pinhole imaging, the coordinate of the texture map is directly obtained during projecting, the intensity of corresponding texture points is processed by the aid of an illumination model, and transparency of the corresponding texture points is processed by designing a learning strategy of two-step projection. The corresponding relation between the geometrical shape of the two-dimensional mapped image and the texture map can be well maintained, different final images can be rendered conveniently by changing different texture maps, flexibility is improved greatly, and the network bandwidth is further saved by only transmitting the texture map as compared with that of the prior art by transmitting the whole character animation sequence.

Description

technical field [0001] The invention relates to the technical field of graphics and image processing, in particular to a method and device for generating a two-dimensional image by projecting a three-dimensional model. Background technique [0002] The traditional image projection process is based on the three-dimensional model, using the camera model to project the image onto a rasterized display device or an image of a specified size. At present, modeling tools are mainly used to build 3D models, and a series of images are rendered according to the models to synthesize a character animation. The 3D model and the texture map originally have a certain mapping relationship, but in the process of projecting the 3D model to the 2D image, the information of the texture map is directly written into the image, so that the 2D image loses the connection with the texture map. mapping relationship. Compared with 3D models, geometric shapes and corresponding textures cannot be separa...

AI Technical Summary

Problems solved by technology

The 3D model and the texture map originally have a certain mapping relationship, but in the process of projecting the 3D model to the 2D image, the information of the texture map is directly written into the image, so that the 2D image loses the connection with the texture map. mapping relationship

Compared with 3D models, geometric shapes and corresponding textures cannot be separated, which is inflexible

In this way, characters with different skins and shapes of the same character need to generate and transmit different image sequences, which seriously occupies network resources.

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