30 results about "Non-photorealistic rendering" patented technology

The invention relates to non-photorealistic rendering in computer graphics, in particular to digital simulation and synthesis with artistic style of Yunnan heavy-color painting, and belongs to the technical field of non-photorealistic graphic rendering. The digital simulation and synthesis are characterized in that: the digital simulation and synthesis comprise an establishment and management module of a Yunnan heavy-color painting basic graphic element library, a graphic element library-based Yunnan heavy-color painting traditional delineation drawing rendering module, and a Yunnan heavy-color painting traditional delineation drawing-based coloring and rendering module. The basic graphic element library is used for providing graphic elements needed by foreground traditional delineation drawings, such as hair, facial forms, trunks and the like. The Yunnan heavy-color painting traditional delineation drawing rendering module can select appropriate graphic elements from the graphic element library to combine the graphic elements by layers so as to generate the Yunnan heavy-color painting traditional delineation drawings. In order to harmoniously collocate all the graphic elements, a system provides multiple kinds of operation for the graphic elements, such as translation, selection, scaling and the like and can modify the shapes of the graphic elements at the same time. The Yunnan heavy-color painting traditional delineation drawing-based coloring and rendering module is in charge of coloring the traditional delineation drawings, and the effects of coloring can reflect texture characteristics and color characteristics in an original drawing of the heavy-color painting, and special characteristic simulation of the Yunnan heavy-color painting, such as character edge hollow sense, background fusion and the like is realized.

The invention relates to an interactive video stylized rendering method based on video interpretation, wherein an interactive video semantic segmentation module and a video stylization module are utilized. A segmentation method of the interactive video semantic segmentation module comprises the following steps of: (1) interactive segmentation and automatic identification of key frame images; (2) matching of dense characteristic points among key frames; and (3) area competition segmentation. A stylization method of the video stylization module comprises the following steps of: (4) un-reality sense drawing of the key frames based on semantic analysis; (5) a brushwork propagating method of a sequence frame; and (6) a damping pen brush system for preventing shaking. The interactive video stylized rendering method based on the video interpretation, disclosed by the invention, has the advantages of short manufacturing period, low cost and favorability on manufacturing in batches.

The invention discloses a linear feature extracting method for three-dimensional point cloud. The linear feature extracting method for the three-dimensional point cloud includes the following steps: S1, projecting an original point cloud to a two-dimensional space along different directions to generate a plurality of two-dimensional images, keeping the depth information, using a non-photorealistic rendering technology to convert the depth information into an image grey value, and enabling each two-dimensional image to have clear edges; S2, extracting a two-dimensional linear support area from the two-dimensional image; S3, projecting the two-dimensional linear support area to the three-dimensional space to obtain a three-dimensional linear support area. By means of projection and back projection, the extraction for the three-dimensional linear support area is converted into the extraction for the two-dimensional linear support area, the data processing complexity is lowered, and linear features can be quickly and precisely extracted from large amount of point cloud data.

A method and system for rendering a captured image of a scene is disclosed which provide see-through vision through the rendered image, for example of an augmented reality object rendered behind the scene, by assigning pixel transparency values in dependence upon captured image pixels. The method and system preserve some structure of the scene in the rendered image without requiring a model of the scene.

The invention discloses a method for rendering character animation in an artistic manner with the assistance of a computer. The method is based on an illumination spherical model. The invention is characterized in that the illumination spherical model which extracts and creates an artistic style from a work of art is applied to rendering of a character model, so that coloring of an artistic style is realized conveniently and rapidly, and character animation can be manufactured as if by non-photorealistic rendering. By drawing on a method for rendering information about illumination on a sphere, the invention ensures that when a complex object which is uniform in illumination material is rendered, the illumination is consistent in an all-round manner. Because of extraction and application of the illumination spherical model, character rendering of the artistic style can be realized conveniently and rapidly only through simple interactive operation, so that rendering efficiency is improved. The invention solves the problems that the prior computer assisted animation has low rendering efficiency, and the traditional image technology cannot give expression to works of an artist flexibly.

The invention relates to a volume data non-photorealistic rendering method based on GPU (graphic processing unit) acceleration. The method comprises the following steps of carrying out the direct volume rendering for medical volume data under multiple viewpoints, acquiring a plurality of rendering results, extracting a characteristic line for the two-dimensional rendering result, defining a global energy miniaturization rule, calculating a three-dimensional characteristic line, utilizing a convolution surface method to define a scalar field, clustering the three-dimensional characteristic line, utilizing a B-type curve to fit the line, and completing the stylized rendering. By utilizing the powerful calculation capacity of the GPU, the rendering speed and efficiency can be greatly improved.

The invention provides a method for simulating a solid combustion process based on a thermodynamic model. The method comprises the following four steps of: a pre-calculation stage which is used for treating changes of details such as geometrical information of the model surface and the texture color of the model after combusted; a stage of flame diffusion calculation of the object surface, which is used for calculating the combustion range of the flame on the model surface at the next time by using thermodynamic model iteration according to the combustion state of the current model; a stage of deformation calculation of a flame object, which is used for calculating the deformation calculation degree of the model by combining the material characteristic of the model surface according to the flame diffusion range and the combustion state; and a non-photorealistic rendering stage, which is used for implementing the non-photorealistic rendering for the flame and the model according to the combustion state of the object in a virtual scene. The method provided by the invention can be used for simulating the flame diffusion on the object surface in the combustion process based on a GPU (Ground Power Unit) and simulating the deformation calculation process of the object due to the combustion, can also be used for implementing the realistic rendering for the flame, and has the characteristics of good real-time performance and strong physical realism.

A method for rendering a non-photorealistic (NPR) content from a set (SI) of at least one image of a same scene is provided. The set of images (SI) is associated with a depth image comprising a set of regions. Each region corresponds to a region of a given depth. The method for rendering a non-photorealistic content includes generation (21) of a segmented image having at least one segmented region generated with a given segmentation scale, wherein the at least one segmented region corresponds to at least one region of the set of regions; generation of a binary edge image in which at least one binary edge region is generated with a given edge extraction scale, the at least one binary edge region corresponding to at least one region of the set of regions; and rendering (23) of the non-photorealistic content by combining the segmented image and the binary edge image.

The invention discloses a water color style non-photorealistic rendering method and device, and belongs to the field of image processing. The water color style non-photorealistic rendering method includes the steps of obtaining an image c by extracting the outline of an image, meanwhile, converting the image into an image f of an HIS space from an RGB space, then removing I components in the image f, enabling a corresponding point pixel value in the image c to be multiplied by a specific coefficient to serve as an I component value of the corresponding pixel in the image f to form a new image g, and then converting the image g from an HSI space to the RGB space to obtain an image b. According to the water color style non-photorealistic rendering method, the water color style of the image can be achieved, the high simulated effect is achieved, the color is bright and limpid, the line outline is clear, the calculating speed is high, and real-time implementation can be achieved.

The present invention provides an image non-photorealistic rendering method and device. The device comprises a to-be-processed image obtaining module, a decoloration processing module, a first Gauss fuzzy processing module, a first image merging module, a second Gauss fuzzy processing module and a second image merging module. The method of the present invention improves greatly on the basis of a conventional rendering method, obtains the new image values by the pixel mathematical calculation, can obtain the images of a similar ink stained form directly, at the same time, can sketch the valuable form edges very clearly, can save a lot of work for the post processing fabricators, enables the subjective image forms to approach the freehand sketching better, and does not have the gradient and stray point phenomena.