71 results about "Surface rendering" patented technology

A pulmonary nodule detection device and method based on a shape template matching and combining classifier comprises an input unit, a pulmonary parenchyma region processing unit, a ROI (region of interest) extraction unit, a coarse screening unit, a feature extraction unit and a secondary detection unit. The input unit is used for inputting pulmonary CT sectional sequence images in format DICOM; the pulmonary parenchyma region processing unit is used for segmenting pulmonary parenchyma regions from the CT sectional sequence images, repairing the segmented pulmonary parenchyma regions by the boundary encoding algorithm and reconstructing the pulmonary parenchyma regions by the surface rendering algorithm after the three-dimensional observation and repairing; the ROI extraction unit is used for setting a gray level threshold and extracting the ROI according to the repaired pulmonary parenchyma regions; the coarse screening unit is used for performing coarse screening on the ROI by the pulmonary nodule morphological feature design template matching algorithm and acquiring selective pulmonary nodule regions; the feature extraction unit is used for extracting various feature parameters as sample sets for the post detection according to selective nodule gray levels and morphological features; the secondary detection unit is used for performing secondary detection on the selective nodule regions through a vector machine classifier and acquiring the final detection result.

The invention discloses a combined display method of a multimode image of a coronary artery. In the method of the invention, a Chinese visible human (CVH) data set and a dual source CT (DSCT) data set are respectively used to establish a three-dimensional visual model of surface rendering and a three-dimensional model of volume rendering. According to a nonrigid change mode, registration is performed to a transthoracic echocardiography (TTE) section image and a corresponding volume rendering section image. Then, a surface rendering section of a corresponding space coordinate is superposed with the TTE section image so as to overcome a difficult existing in a TTE teaching training. Abstract understanding to the TTE image is greatly influenced by subjective consciousness. Therefore, it is not convenient for understanding and mastering. By using the method provided in the invention, a medical student can visually understand and grasp the TTE and two and three level branches of the coronary artery corresponding to a corresponding myocardial segment.

The present invention discloses a real-time reconstruction method for a three-dimensional scene based on a depth camera. The method comprises the following steps: acquiring original depth data and color data, performing denoising processing on the depth data, performing coordinate conversion on a depth image, performing camera attitude tracking, performing point cloud fusion and recording color information, performing point cloud model implicit surface rendering, and performing scene model reconstruction. According to the method disclosed by the present invention, the scene is scanned by usinga single depth camera, a depth data stream of the scene is obtained, real-time processing is performed on the data on the computer, and a corresponding three-dimensional model is generated; and a three-dimensional reconstruction system with a low cost, an easy operation, high quality and real-time performance can be provided, and a three-dimensional model with high quality and strong visualization is generated.

The present invention relates to computer graphics. This method allows efficient real-time 3D rendering of high-detail smooth surfaces. It is exceptionally effective with software rendering and low-end weaker graphics accelerators, and provides excellent visible quality per the amount of polygons used, while retaining low CPU processing overhead and high efficiency on graphics hardware. Also, it can be used under very restrictive memory requirements. In particular the invention relates to real time rendering of extremely detailed smooth surfaces with view-dependent tessellation using an improved level of detail approach. The invention utilizes a quad-tree map and geometric boundaries consisting of manifold non-self-intersecting surfaces. All cached fragments keep all of the information loaded from their corresponding source nodes in system memory, and additional information computed by the rendering system.

A method and apparatus for combined 4D presentation of quantitative regional parameters on a surface rendering is disclosed herewith. The method comprises: identifying a region of interest in a volumetric image data. Then, the following steps are iterated to produce a 4D surface rendering. The iterated steps include: tracking the region of interest of the volumetric image data to produce a displacement field. A color coded texture representing at least one quantitative regional parameter is applied on a surface defined by the volumetric data and the surface is being surface rendered with reference to the displacement field.

This invention provides for provides for abrasive compositions and methods of use of these compositions for the preparation of surfaces for the application of various coatings such as paints, lacquers and varnishes. The abrasive compositions of this invention provide rapid cleaning and dulling of the underlying surface rendering it suitable for the application of paints or other finishes.

The embodiment of the invention provides a water surface rendering method, a device and a readable storage medium. The method comprises the following steps of responding to a construction request of awater body area, constructing a water body area composed of a water body grid in a target area of a game scene; obtaining the vertex data of the water body grid and the illumination data of the current game scene; according to the vertex data of each water body grid unit of the water body grid, calculating the water body transparency of each water body grid unit; calculating the water body colorof the water body area according to the illumination data; obtaining the reflection color of the water body area through a pre-rendered reflection map, and calculating the target water body color of the water body area according to a Fresnel value, a reflection color and the color of the water body; based on the water body transparency of each water body grid unit and the target water body color of the water body area, rendering the water body area. Therefore, the good water surface effect can be quickly simulated on a mobile terminal. The problem in the prior art that the CPU and the GPU arelarge in performance consumption during the simulation of the water surface effect on a common mobile terminal is solved.

The invention relates to the technical field of computer graphics technology, and in particular relates to an optimization method of skeletal animation rendering, which comprises the following steps of: depending on a required water surface effect, making a corresponding Bump map by a graphic designer, for simulating a water surface height; by a vertex texture technology, disturbing on a grid height of a water surface in a vertex Shader, and reducing a calculation amount to the greatest extent through the Bump which reads a normal and a height, to achieve a real effect; meanwhile, aiming at the characteristic of comparatively serious consumption of the vertex texture filter, a height map is optimized and stored, so that the times of texture addressing is greatly reduced, and the water surface rendering depend on a normal map to implement illumination calculation because the normal map can faithfully represent all details under a high-frequency waveform. In addition, a low-frequency and high-amplitude wave is used for disturbing the water surface grid; and a water surface model is based on overlap of a plurality of height maps which are segmented on both space and time.

The invention relates to a virtual sea surface rendering method and system. The method comprises the steps that priorities of multiple candidate rendering processing modes are determined, wherein each candidate rendering processing mode is used for rendering a to-be-rendered virtual sea surface to achieve a corresponding artistic effect; a mapping relation between all the candidate rendering processing modes and performance parameters of a mobile terminal is established according to the priorities of all the candidate rendering processing modes; one performance parameter of the preset mobile terminal used for displaying the to-be-rendered virtual sea surface is detected; a selected rendering processing mode is determined among the candidate rendering processing modes according to the performance parameter of the preset mobile terminal and the mapping relation; the to-be-rendered virtual sea surface displayed on the preset mobile terminal is rendered through the selected rendering processing mode. The rendering processing mode matched with the performance parameter of the mobile terminal can be selected according to the performance parameter, and therefore the artistic effect appropriate for the mobile terminal is displayed.

The invention relates to an anti-segmentation method for a medical image, which comprises the following steps that: 1) two-dimensional input equipment is used for selecting a corresponding three-dimensional voxel point from a three-dimensional organ by three-dimensional volume rendering technology; 2) the three-dimensional voxel point is used as a seed point of a segmentation arithmetic, a segmentation result is subjected to volume rendering, and the segmentation result is displayed in the space of a three-dimensional image during the segmentation arithmetic in real time by volume rendering; 3) in the displaying process of the segmentation result by volume rendering, a user can pause the segmentation step at once when observing that the segmentation result does not accord with the requirement of the user, adjust the unreasonable part and restore the segmentation process; 4) the user can adjust the segmentation result in real time in the whole segmentation process until the user is satisfied with the segmentation result; and 5) when the user is satisfied with the current segmentation result, the user can save and export the current segmentation result at once into a binary sequenceimage, and also can perform surface rendering on the current segmentation result at once, export a surface model of the result and prepare for the subsequent virtual operation. Through the method, the user can basically obtain a precise abdominal organ object by performing once segmentation process so as to provide exact data for the subsequent virtual operation.

The invention relates to an indoor mapping and positioning method based on target identification. The method comprises steps that 1), a color depth image is inputted, and a target object model database is established based on the color depth image; 2), the color depth image measured in real time is inputted, the color depth image is converted into 3D point cloud, and a scene surface which can be seen from the present visual angle is further solved; 3), a camera attitude is estimated according to the 3D point cloud and based on the closest iteration point; 4), according to the 3D point cloud and the established target object model database, object identification is carried out through utilizing point pair characteristics, and an object attitude is estimated; 5), an attitude map is optimized through utilizing the camera attitude and the object attitude; and 6), the optimal object attitude is acquired according to the attitude map, surface rendering is carried out through utilizing the existing target object model database, and the three-dimensional map in the present environment is acquired. The method is advantaged in that indoor positioning and mapping are carried out under the plenty-of-object scene, mapping precision is high, and a few of calculation resources are utilized.

The invention discloses a digital biological organism modeling method based on three-dimensional super voxel description. The method comprises the following steps of firstly, carrying out format conversion, binaryzation and other preprocessing on an original medical image of an organism so as to acquire a physiological-structure peripheral region to be segmented; secondly, reconstructing a two-dimensional image sequence of the physiological-structure peripheral region to be segmented to a three-dimensional space, and using a super voxel algorithm to divide a three-dimensional image into super voxels whose sizes are similar to each other; and then, through a graph-cut algorithm based on a Gaussian mixture model, automatically segmenting the super voxels into two portions of a foreground and a background; and finally, using a surface rendering method to reconstruct the super voxels which belong to a foreground type in the three-dimensional space so as to acquire three-dimensional display of a physiological structure area to be segmented and three-dimensional display of the area in the whole organism. By using the method of the invention, a negative effect of other portions of the organism on a segmentation result is reduced; time is saved; robustness of the algorithm is increased and computation complexity of graph cut is reduced; and segmentation accuracy is increased.

A curved surface rendering method grids a curved surface to a plurality of triangles, and further divides the plurality of triangles to sub-triangles. Furthermore, the method determines surface triangles and inner triangles from all triangles of the curved surface, and displays the surface triangles on a display device.

The invention relates to a real-time synchronous display method for multiple splicing screens. The method comprises the steps that S1, a controller starts server software; s2, each splicing screen starts client software; s3, the client acquires the position coordinate information of the display area from the server according to the physical position; s4, the controller acquires image frame data, codes the image frame data through hardware and sends the coded image frame data to each splicing screen client; s5, the splicing screen receives the image frame data, obtains the image data accordingto hardware decoding, carries out Surface rendering through a GPU, and determines a display area according to the coordinate information; and S6, the server sends a synchronization signal to the client, and the client receives the synchronization signal and performs image area display. A device comprises the controller, a network switch and the splicing screens, the controller serves as a server,the splicing screens serve as clients, decoding and playing of videos are completed on the controller, and finally pictures are displayed on the splicing screen device. The method has the advantages that the display modes are diversified, the real-time degree is high, the expansibility is good, and the configuration flexibility is high.

The invention discloses a wall surface rendering device. The wall surface rendering device comprises a base. The upper end of the base is provided with a sleeve. The sleeve is internally provided witha vertical rod in a sleeving mode. The upper end of the vertical rod is provided with a transverse rod A. One end of the transverse rod A is provided with a vertical plate. Two rows of transverse rods B are arranged on the vertical plate in a penetrating mode. Each row has the multiple transverse rods B. One end of each transverse rod B is provided with a blocking block. Each transverse rod B isprovided with a baffle. Each transverse rod B is sleeved with a spring A. The other end of each transverse rod B is provided with a supporting plate. A spring B is arranged between each correspondingsupporting plate and the corresponding baffle. The two ends of each supporting plate are provided with side lugs. A shaft is arranged between every two side lugs. Each shaft is sleeved with a roller.The surface of each roller is provided with a rubber layer. Each rubber layer is provided with a brush. The upper end of the vertical plate is provided with a discharging pipe. The discharging pipe isprovided with a control valve and a hose. A pump is arranged on a material loading box. The material loading box is provided with a cover. The side edge of the base is provided with a material receiving box. The material receiving box is provided with a filtering net. Universal wheels are arranged on the lower portion of the base. The base is internally provided with a communicating pipe. The wall surface rendering device not only can render a plane wall, but also can render a curved surface wall or an uneven wall surface, the roller are automatically rendered with coating, and operation is simple and convenient.

The invention is applicable to the technical field of computer visualization processing, and provides a three-dimensional data clipping method which comprises the following steps of: drawing the three-dimensional data in projection transformation; selecting a visualization area to be processed; constructing the curved line and curved surface of the clipping area; and modifying the three-dimensional data according to the constructed cured surface, and re-drawing the modified three-dimensional data. Preferably, the three-dimensional data can be subjected to volume rendering or surface rendering in parallel projection, and modification on the three-dimensional data is realized by virtue of Boolean calculation. The invention also provides a three-dimensional data clipping system for realizing the method. Therefore, according to the invention, the three-dimensional data is drawn so as to ensure that users can observe conveniently, thereby realizing the purpose of carrying out interactive modification on the three-dimensional data in visualized situation.

The present invention relate to a fly ash- desulfuration gypsum- concrete self-expandable anti-crack dry powder mortar and method of preparing the same. The dry powder mortar is mixed stirring by gelled materials, modified enhancement component and skeleton fine-grained materials. Each ingredient of the gelled materials is in mass ratio of: fly ash 10-60%, desulfuration gypsum 20-70%, concrete 10-20%. Each ingredient of the modified enhancement compoents in the gelled materials is in mass ratio of: methyl cellulose aether 0.1-0.3%, polypropylene farrago fibre 0.2-0.3%, anhydrous sodium sulfate 0-2%, water reducing agent 0.5-2.5%. The admixing amount of the fine-grained materials is 1.5-3 time the mass of the gelled materials. The present invention is provided with better early and later stage mechanics capability, excellent anti-crack decrement capability, specially suitable for surface rendering and masonry of buildings, simultaneity utilizing a good deal of industry scrap fly ash and desulfuration gypsum of coal-fired power plant, possess prominent energy-saving and environment friendly capability.

A method and system for rendering bicubic surfaces of an object on a computer system. Each bicubic surface is defined by sixteen control points and bounded by four boundary curves, and each boundary curve is formed by boundary box of line segments formed between four of the control points. The method and system of include transforming only the control points of the surface given a view of the object, rather than points across the entire bicubic surface. Next, a pair of orthogonal boundary curves to process is selected. After the boundary curves have been selected, each of the curves is iteratively subdivided, wherein two new curves are generated with each subdivision. The subdivision of each of the curves is terminated when the curves satisfy a flatness threshold expressed in screen coordinates, whereby the number of computations required to render the object is minimized.

Disclosed is a method for applying a spherical harmonic lighting technology to surface rendering. In the method, a texture backfill method is used so that the spherical harmonic lighting technology can be applied to the surface rendering. Therefore, carrying out discrete sampling on each surface patch in a surface model so that the surface model is converted into a point model; obtaining a spherical harmonic coefficient group of each point through a spherical harmonic lighting method; according to each discrete point and a corresponding spherical harmonic coefficient group of the point, generating a group of spherical harmonic coefficient textures for each face through the texture backfill method; finally, rendering the surface model through a surface rendering method and programming through GPU rendering pipelines so that spherical harmonic lighting simulation is completed. The method for applying the spherical harmonic lighting technology to the surface rendering improves a rendering quality obviously on the premise that a rendering efficiency is not sacrificed. At the same time, the method is capable of improving the rendering efficiency in a certain degree and overcoming different deformation problems generated by overlap of points or inadequacy of coverage ranges in rendering.

This invention provides for provides for abrasive compositions and methods of use of these compositions for the preparation of surfaces for the application of various coatings such as paints, lacquers and varnishes. The abrasive compositions of the invention provide rapid cleaning and dulling of the underlying surface rendering it suitable for the application of paints or other finishes.

The patent puts forward a Unity-3D-based three-dimensional surface reconstruction and rendering method, wherein the method is suitable for 3D printing. The method comprises: (1), three-dimensional image collection and processing are carried out on a target object; slice fault scanning is carried out and curve edge data of the target object are obtained by using a laplace operator; (2), surface data reconstruction of a three-dimensional target object is carried out, an equivalent point position is calculated by using a linear interpolation method, a normal vector of the equivalent point is calculated by using a central difference method, and corresponding surface data of the equivalent point are calculated by using triangular meshing; and (3), surface rendering of the target object is carried out, three-dimensional surface data are read under Unity 3D, reconstructed three-dimensional object surface rendering is carried out by selecting indexes like illumination and colors. Lots of experiments demonstrate that the three-dimensional reconstruction and rendering method is effective and the obtained result is better than that of the existing technical method in terms of three-dimensional and visual effects.

The invention relates to the mobile medical image processing technology and aims to provide a medical three-dimension reconstruction rapid interaction rendering method based a mobile terminal. The method mitigates the operating pressure of the mobile terminal and enables the interaction process to be smooth. The medical three-dimension reconstruction rapid interaction rendering method based the mobile terminal comprises the following steps of (1) sending parameters to a server by the mobile terminal according to user requirements, wherein the parameters comprise a DICOM sequence which is required to be selectively checked and interactive information of a user; (2) determining whether the DICOM sequence is subjected to three-dimension reconstruction or not, if not, performing volume rendering computation and surface rendering computation, and sending results to the mobile terminal, and if so, performing volume rendering computation and sending volume rendering and surface rendering results to a mobile terminal which sends an instruction this time according to whether the mobile terminal which sends the instruction is identical to the mobile terminal which sends an instruction during first reconstruction; and (3) presenting the results on the mobile terminal.

The invention discloses an automatic extraction method of human chest organ tissue, belongs to the technical field of medical image processing, and aims to solve the problems that boundaries of organ tissue are unsmooth and observation by researchers and clinicians is affected due to the fact that an existing image segmentation technology is not clear enough. The automatic extraction method is characterized by comprising steps as follows: reading three-dimensional tomography images; performing fitting and primary segmentation processing on each image in a sequence with a least square ellipse fitting algorithm, parts outside sternums are removed, and parts inside the sternums are reserved; image noise of the parts inside the sternums is removed, segmentation processing is performed again to remove unnecessary soft tissue, and regions of interest, including trachea and blood vessels, inside the sternums are obtained; volume rendering and surface rendering are performed. Medical image segmentation has great significance in three-dimensional visualization, three-dimensional positioning, operation planning formulation and computer assisted diagnosis. With the adoption of the automatic segmentation method, the effect of subjective factors of an observer is completely avoided, the data processing speed is increased, and the repeatability is good.

A breakwater, in which the surface thereof facing the sea (H) is a curved surface rendering the cross section of the breakwater a trapezoid with curved side (ABCDEFG) which comprises a shorter top side (EF), a longer bottom side (AG), and a curved side (ABCDE) facing the sea (H). The curve profile is similar to a recumbent concaved-up parabola.

A system and method for volume rendering a light field, wherein the light field data is subjected to a layering scheme introducing a partitioning of the hogels into subsets. Each subset corresponding to a sub-volume of the layer volume, corresponds to the sub-region of the layer. Novel partitioning of the data combined with an efficient local memory caching technique, plenoptic downsampling strategies to reduce memory bandwidth requirements and volume rendering algorithm to produce a rendered light field image. A reduction in the total number of samples required can be obtained while still maintaining the quality of the resulting image. A method is also provided to order memory accesses aligned with ray calculations in order to maximize access coherency. Real-time layered scene decomposition can be combined with surface rendering method to create a hybrid real-time rendering method that supports rendering of scenes containing superimposed volumes and surfaces.

The invention relates to a dry-hanging fastener for an interior and exterior wall decoration material of a building and a dry-hanging installation structure. The dry-hanging fastener comprises a back plate and a horizontal plate which are perpendicular with each other, wherein an upper fastener and a lower fastener are arranged on the outer edge of the horizontal plate, the upper fastener and the lower fastener incline towards one side of the back plate and form angles A with the horizontal plate, the upper fastener provided with the angle A pushes the interior and exterior wall decoration material, installed through the upper fastener in a dry-hanging mode, of the building towards an upper baffle, and the lower fastener provided with the angle A pushes the interior and exterior wall decoration material, installed through the lower fastener in a dry-hanging mode, of the building towards a lower baffle. Each piece of the interior and exterior wall decoration material of the building is dry-hung on an installation basis through four dry-hanging fasteners. The dry-hanging fastener has the advantages that the dry-hanging installation structure is firm and reliable, dry-hanging installation can be performed without wall surface rendering, the installing efficiency is remarkably improved, and the dry-hanging installation cost and the technical grade requirements of installers are greatly reduced.