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Augmented Reality and 3D modelling

Augmented Reality and 3D modelling. Done by Stafford Joemat Supervised by Mr James Connan. Project Overview. Marker-based Augmented Reality uses a camera and a visual marker to determine the center of orientation and range of its coordinate system.

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Augmented Reality and 3D modelling

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  1. Augmented Reality and 3D modelling Done by Stafford Joemat Supervised by Mr James Connan

  2. Project Overview • Marker-based Augmented Reality uses a camera and a • visual marker to determine the center of orientation • and range of its coordinate system • Thesystem is effectively a driver that allows users to • superimpose a 3D object on a predefined marker, • across multiple frames using fixed input video source.

  3. Project Overview • Object Orientated Analysis • Grayscale • Speed Up Robust Features (SURF) • OpenGL • Object Orientated Design • User Interface Specification

  4. Greyscale • Fast image processing due to limited detail. • Image intensity is stored in greyscale • 8 bits per sampled pixel, which allows 256 different • intensities • Red, green, and blue (RGB) are primary colours. • Gamma expansion is used to get their linear • intensity encoding to convert image into • approximate level of grey

  5. Greyscale

  6. Speed Up Robust Features (SURF) • Computer vision algorithm used for object • recognition • SURF is used to create an image pyramid • It filters the pyramids appropriately to detect • points of interest. • By calculating the features it then compare with • features of another image to find matches.

  7. Speed Up Robust Features (SURF) Algorithm

  8. Feature detection

  9. Feature comparison

  10. OpenGL • Cross-platform API for writing applications that • produce 2D and 3D computer graphics. • Is able to draw complex three-dimensional objects • in real-time • Is capable of interfacing with other libraries. • Hide complexities of interfacing with different 3D • accelerators

  11. User Interface Specification

  12. Object Orientated Design

  13. Object Orientated Design in detail

  14. Project Plan • Term 3 • Tweak algorithm stability. • OpenGL virtual camera Calibration • Superimpose 3D object on marker. • Verify requirements. • Term 4 • Testing and evaluating software • Create User and Technical Manual.

  15. References: http://internet.suite101.com/article.cfm/using_printable_augmented_reality_marker_tags http://technotecture.com/augmentedreality http://opencv.willowgarage.com/wiki/ http://www.cs.cmu.edu/~cil/vision.html http://www.adobe.com/devnet/flash/articles/augmented_reality.html www.hotcards.com

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