Presented by:
Neha Vinod Holamoge

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BLING: A New Sketch Based 3D Model Search Engine.
ABSTRACT
 Number of 3d models increasing rapidly.
 Searching the models from the database has become an increasing demand.
 A new 3d model search engine called as BLING is proposed.
 It retrieves 3d model by sketch.
INTRODUCTION
 3D models are used in the wide range of fields such as virtual reality , mechanical engineering ,film entertainment etc.
 3D models-another domain
 To reuse the resources from 3D model databases ,
methods to search out the models are needed.
2 ways of retrieving 3D models.
Textual keywords
Content based searching
Content based searching:
2 types of interfaces
Query By Example: It takes the detailed 3D model as input.
Query By Sketch:
 Its takes a sketch as an input.
 BLING is an example .
 Voxel model is generated interactively from sketch and compared with the models from the database .
REVIEW
 Query By Sketch search engine adopted 2D and 3D sketches as input.
 In 2D sketch based search engine , users are often required to draw sketched of an object from top ,side and front view.
 Tedious job to accomplish.
 3D sketch based modeling is introduced to retrieval interface.
 3D model searching can be processed using 2 ways
 Mesh Model: An unstructured grid which is a collection of vertices , edges and faces that defines the shape of an object in 3D computer graphics.
 Voxel Model: volume elements(voxels) in a discrete 3D space.
ARCHITECTURE OF BLING SYSTEM
SKETCH BASED 3D VOXEL MODELLING
 Users can draw sketches to generate and modify voxels to create models.
 2 methods to construct a voxel object.
Model generation
Model modification.
 Model generation:
 Model modification:
Open curve modifying: It allows the users to draw sketch across the object.
Closed curve modifying: It allows the user to draw the sketch through the interior.
RETRIEVAL
 Key point-extracting shape feature .
 VD2 is generated by taking the euclidean distance between randomly selected voxels.
 Surface voxels and internal ones are taken into consideration.
 This is compared with the models in the database.
 COMPARISON BETWEEN THE OTHER ALGORITHMS AND VD2
 INTERFACE OF BLING
 RETRIEVAL RESULT EXAMPLES
CONCLUSION
 BLING is simple .
 It can satisfy result for searching interested 3D models.
 The areas of future improvement are:
An intelligent view selector is needed.
User feedback methods is required.