Sketch-based design for green geometry and image deformation software

Were upgrading the acm dl, and would like your input. Aug 25, 2011 user interfaces have traditionally followed the wimp window, icon, menu, pointer paradigm. Consequently, we design a sketchbased modeling interface using silhouettes and sketches as input, and producing contours, or suggestive contours, and ridgesravines. Research related to this paper includes sketch based garment design, 2d shape deformation and skeletondriven deformation. Citeseerx citation query active coanalysis of a set of shapes. In industrial design, manmade shapes are typically modeled. An algorithm for combined text and geometry interpretation, based on different. Thanks to the particular design of the deformation energy, its gradient can be efficiently computed, making the entire image editing framework interactive and. Deep sketchbased modeling of manmade shapes deepai. Normalcontrolled coordinates based featurepreserving. Us8988461b1 3d drawing and painting system with a 3d scalar.

Sketchbased modeling aims to model 3d geometry using a concise and easy to createbut extremely ambiguousinput. This cgip research group focusses on the development of novel and efficient algorithms for various applications in the following areas. These consist of computer animation, embodied agents, virtual environments, augmented reality, virtual life and visualisation. A humanintheloop sketching interface supports image registration and constrains our geometrical.

Shape synthesis from sketches via procedural models and. Efficient sketch based creation of detailed character models through datadriven mesh deformations figure 1. The users input stroke c sk is used to guide di erent phases of the deformation algorithm, as shown in figure 1. Shape modeling by sketching using convolution surfaces. See more ideas about parametric design, design and grasshopper rhino. In a, six percent of the original set of points is used in the control polygons construction. The system then segments all imagespace silhouettes of the projected surface, identifies among all silhouette segments the best matching part, derives vertices in the surface mesh corresponding to the silhouette part, selects a subregion of the mesh to be modified, and feeds appropriately modified vertex positions together with the submesh. Layered structures are represented as solid models with. Instead, we automatically learn a separate, perhaps stronger, shape prior for each category of shapes from data. Sketchbased modeling tools like teddy 1999 and fibermesh 2007 do not explicitly maintain a skeleton. Most conventional sketchbased modeling systems target smooth shapes and, to counter the ambiguity, put manuallydesigned priors on the 3d shape.

A sketchbased interface for detailpreserving mesh editing. Sketch based curve design sketch based construction and modification of curves enable a direct control of key shape features, and thereby the resulting surfaces. Efficient sketchbased creation of detailed character. Even in sketched based design this approach is employed and one example is the shapeshop schm05 sketch based modeling system. Interface sketchbased retrieval in large sets of drawings. Sketchbased design for green geometry and image deformation. Chen, softtouch haptics modeling of dynamic surfaces, selected in book of virtual technologies for business and industrial applications, igi global. Rendering 3d paintings can be done by compositing strokes embedded in space.

Sketchbased curve design sketchbased construction and modification of curves enable a direct control of key shape features, and thereby the resulting surfaces. One recent method is the gabor local line based feature galif. The textbook explains the concepts through realworld examples and the tutorials used in this textbook ensure that the users can relate the knowledge gained from this textbook with the actual mechanical industry designs. This paper presents a system for designing geometric models and image deformation with sketching curves, with the use of green coordinates. Even in sketched based design this approach is employed and one example is the. In this paper, we show how to deform a 2d image by using cage coordinates cc, which. The main challenge in sbim is sketch interpretation, of which we identify three primary methods. In computer modeling, sketching on paper is often used in the early prototyping stages of a design, before the depicted design is manually converted into a 3d model by a trained 3d artist. Mathpad is a tool for solving mathematical problems. A sketchbased tool for finite element analysis purdue. Key poses of finger crossover while playing scales.

Sketchbased 3d shape retrieval mathias eitz1, kristian hildebrand1, tamy boubekeur2 and marc alexa1 1tu berlin 2 telecom paristechcnrs a view generation b query results for a handdrawn sketch figure 1. Sketch based design for green geometry and image deformation. Because of this, model creation is a major bottleneck in production pipelines, requiring human effort to create the complex and diverse shapes and intricate interrelationships. A sketching interface for 3d freeform design takeo igarashi, satoshi matsuoka, hidehiko tanaka university of tokyo, tokyo institute of technology abstract we present a sketching interface for quickly and easily designing freeform models such as stuffed animals and other rotund objects. Keywords content based retrieval sketch based retrieval multilevel description highdimensional indexing graph spectrum visual features extraction ii. Pdf cagebased deformation is widely used in various applications of image and geometry processing. Sketchbased modeling aims to model 3d geometry using a concise and easy. This hybrid journal is read by scientists, artists and technicians applying animation techniques.

In contrast, our work is mainly related to creation of 2d geometry for structural analysis. Since the first sketch based interface 11 the concept has been largely developed and explored, from architectural design 5 to. A taxonomy of modeling techniques using sketchbased interfaces. As output, the algorithm produces a set of probabilistic partbased templates that groups the original models into clusters of models capturing their styles and. Generally speaking, most of sketch based modeling techniques can be placed. Foldsketch users specify the fold or pleat configuration they seek using a simple schematic sketching interface. Bin sheng, weiliang meng, hanqiu sun, enhua wu, sketchbased design for green geometry and image deformation, multimedia tools and applications, v. Cgip research group computer graphics and image processing research group what is the cgip research group.

When c sk is received figure 1a, we rst extract figure 1b and smooth figure 1c the geometric. Sketch based image deformation igl interactive geometry lab. Algorithms and interfaces for sketchbased 3d modeling by. Seed is a sketchbased 3d model deformation approach, with an interface inspired by teddy 2. The chapter on the freestyle workbench will enable the users to dynamically design and manipulate surfaces. Our technique thus greatly reduces the amount of user intervention needed for sketch based modeling of 3d scenes. Nbtree topology similars by topology refine query candidate drawings sketched query interface drawings sketchbased retrieval in large sets of drawings.

Active coanalysis of a set of shapes 2012 by y wang, s asafi, o van kaick, h zhang, d cohenor, b chen. Sketch model creation from a 3d template provides a promising solution. Network topologies for scalable multiuser virtual environments. Freehand sketching serves as a cognitive tool to support users intuitive abilities by exploring the visual components of a design. The first row shows a key frame of the thumb crossing over the middle finger while playing the cmajor scale, and the second row shows a key frame of the thumb crossing over the ring finger while playing the dmajor scale, both from three perspectives. Kho and garland 58 developed a similar sketchbased interface for posing 3d characters, in particular, bodies and limbs.

Manmade shapes are varied, diverse, and complex fig. These two properties make ncc outperform the previous differential coordinates in many mesh processing jobs. This approach allows users to construct the core shape of their designs, similar to the way modelers explore product ideas with pencil and paper sketches 29. While folds and pleats add interest to garments and cloth objects, incorporating them into an existing design manually or using existing software requires expertise and time. A typical approach to modeling new geometry is to start with a simple primitive such as a sphere or a cube and gradually construct a more complex geometry using csg operators. Sketch based garment design provides a natural and effective way to communicate design ideas by mimicking the traditional paper and pencil design style. Citeseerx citation query active coanalysis of a set of. Bin sheng, weiliang meng, hanqiu sun, enhua wu, sketch based design for green geometry and image deformation, multimedia tools and applications, v. Normalcontrolled coordinates based featurepreserving mesh. May 29, 20 as a local shape descriptor, normalcontrolled coordinates ncc are well defined on the boundary vertices of open meshes, and proven being always parallel with the corresponding vertex normals, which means no tangential drift appears in various editing operations. Sketchbased 3d object retrieval is an evolving domain with many open problems in. Mvc, harmonic coordinates hc and green coordinates gc. Almost always in state of the art approaches a large amount of best views are computed for 3d models, with the hope that the query sketch matches one of these 2d projections of 3d models using predefined features. The user can sketch a curve, and the system adapts the shape so that the sketch becomes a feature line on the model, while preserving global and local geometry as much as possible.

To circumvent this problem, we present a sketchbased approach to procedural modeling. Computer animation and virtual worlds is the first journal to address the global thematic of the virtual worlds. Creation of detailed character models is a very challenging task in animation productionbased character. Parsketch is a sketch based interface for editing 2d parametric geometry. Users input strokes and other image elements using an input device that specifies a 2d view of the element, and the system provides the 3d position of the element based on rules and processes, some of which allow for user input of high level parameters, thereby allowing for intuitive and quick entry of 3d elements. Computer animation and virtual worlds wiley online library. Sketch based image deformation mathias eitz olga sorkine marc alexa tu berlin email. Sketchbased coretrieval and coplacement of 3d models kun xu 1kang chen hongbo fu2 weilun sun 1shimin hu 1tsinghua university, beijing 2city university of hong kong figure 1. Interactive multiresolution modeling on arbitrary meshes. Modelguided 3d sketching visual computing research center at. This shape space is then used to restrict the deformation to plausible shapes. In this paper, we describe finite element analysis made easy feasy, a sketchbased interface for static finite element analysis. Wu, interactive image deformation using cage coordinates on gpu, proceedings of acm international conference on vrcai 2009, p. Help design your new acm digital library were upgrading the acm dl, and would like your input.

Gpu algorithms and implementations, spherical harmonic lighting. As a local shape descriptor, normalcontrolled coordinates ncc are well defined on the boundary vertices of open meshes, and proven being always parallel with the corresponding vertex normals, which means no tangential drift appears in various editing operations. Sketch based modeling and editing via shape space exploration. Layered structures are represented as solid models with volumes bounded by surface patches and curves b. Creation of detailed character models is a very challenging task in animation production based character. B sketchbased modelling and visualization of geological deposition. Research related to this paper includes sketchbased garment design, 2d shape deformation and skeletondriven deformation. Pushkar joshi graphics, geometric modeling, visualization. Sketchbased surface design using malleable curve networks.

Freeman, fredo durand, style transfer for headshot portraits, acm transactions on graphics tog, v. Computer graphics and image processing research group. Pdf interactive image deformation using cage coordinates on gpu. Sbim blends concepts from computer graphics, humancomputer interaction, artificial intelligence, and machine learning. Pdf parts, image, and sketch based 3d modeling method. This approach allows users to construct the core shape of their designs, similar to the way modelers. Sketchbased tree modeling using markov random field. A major challenge here is the need for techniques to transform ambiguous freehand strokes of a sketch into usable parametric. Automatic rigging for partbased shape modeling and. If you have additions or changes, send an email information here is provided with the permission of the acm.

Efficient sketchbased creation of detailed character models through datadriven mesh deformations figure 1. User interfaces have traditionally followed the wimp window, icon, menu, pointer paradigm. Sketchbased 3d shape retrieval using convolutional neural. Sketch representation such as shape context 1 was proposed for image based shape retrieval.

Omkk06, zs07, image deformation esa07, architecture. Retrieving 3d models from 2d human sketches has received considerable attention in the areas of graphics, image retrieval, and computer vision. Sketch based image deformation interactive geometry lab. The field of sketchbased interfaces and modeling sbim is concerned with developing methods and techniques to enable users to interact with a computer through sketching a simple, yet highly expressive medium.

A visibility algorithm for hybrid geometry and imagebased modeling and rendering, computers and graphics, 235, october, 1999, 719728. Sketchbased modelling and conceptual visualization of. Sketchbased interfaces and modeling ebook by rakuten kobo. Direct design of joint geometry often requires more effort than the design of the rest of the object geometry, as it requires design of components that stay in precise contact, are aligned with other parts, and allow the desired range of motion. Geometry descriptor geometry extraction geometric query geometry descriptors geometry extraction insertion topology.

For example, many datadriven approaches now rely on access to semantic segmentation information, accurate intermodel pointtopoint correspondence, and deformation models that characterize the model collections. Index terms3d sketching, conceptual design, interface, canvas. The aim of the sketchbased modeling is to combine the simplicity of 2d sketching with powerful 3d capabilities. This thesis presents foldsketch, a new system that supports simple and intuitive fold and pleat design. To design a computer application capable of understand ing sketched input, it. Sketchbased garment design provides a natural and effective way to communicate design ideas by mimicking the traditional paperandpencil design style. A system for automatic animation of piano performances. Users simply draw the outline of the source image region and sketch a new. Smooth meshes for sketchbased freeform modeling request pdf.

First, shape is defined by the topological and geometric relations between. The second sketching proxygeometry we provide is the layertopsurface,activatedwhentheuserselectsit. International journal of software and informatics, science press 2009 2016. Note that when possible i link to the page containing the link to the actual pdf or ps of the preprint. Garment design and shape description for sketchbased applications. Traditional modeling software can be found such as maya, 3d max, sketchup. Without any user intervention, our framework automatically turns a freehand sketch drawing depicting multiple scene objects left to semantically valid, well arranged scenes of 3d models right.