3d Morphing And Shape Transformation Using Slices

Yasmin, Shamima (2009) 3d Morphing And Shape Transformation Using Slices. PhD thesis, Universiti Sains Malaysia.

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Abstract

Secara umum istilah ’Transformasi Rupa Bentuk’ bermaksud transformasi sebuah objek kepada sebuah objek yang lain. Apabila transformasi rupa bentuk melibatkan dua buah objek iaitu objek sumber dan objek destinasi, dan terdapat pelenyapan rupa bentuk objek sumber kepada objek destinasi secara beransur-ansur, berterusan dan serentak maka transformasi rupa bentuk ini dipanggil ’Pemorfan’. Kebanyakan algoritma transformasi rupa bentuk sedia ada melibatkan banyak campur tangan pengguna, tidak boleh diskalakan dengan rapi apabila bilangan objek input lebih daripada dua dan tidak boleh diskalakan dalam persekitaran perkomputeran selari dan teragih apabila diperlukan. Tesis ini menyentuh isu-isu tersebut dengan mencadangkan algoritma pemorfan 3D yang novel menggunakan hirisan. Pada mulanya objek sumber dan destinasi disusur, dan hirisan dijana daripada penyusuran berkenaan. Penyusuran data tertentu mungkin menjana hirisan yang tidak semestinya selari antara satu sama lain. Bilangan hirisan yang sama dijana bagi kedua-dua objek sumber dan destinasi. Sempadan kedua-dua objek berkenaan diekstrak. Sempadan berkenaan kemudiannya disusur pada satah 2D dan ditransformasikan kepada masing-masing satu awan titik kontur. Interpolasi awan titik kontur sumber dan destinasi yang sepadan dilakukan, dan permukaan yang ditransformasikan dibina semula. Generally the term ‘Shape Transformation’ means transformation of one object into another object. When shape transformation involves two objects i.e. source object and destination object and there is gradual, continuous and simultaneous dissolvement of the shape of source object to destination object, it is called ‘Morphing’. Most of the existing shape transformation algorithms involve a lot of user intervention, do not scale well when the number of input objects is more than two and are not scalable in parallel and distributed computing environment whenever needed. This thesis addresses the above-mentioned issues by proposing a novel 3D morphing algorithm using slices. Firstly source and destination objects are traversed and slices are generated from this traversal. Traversal of a particular data may generate slices which may not be parallel to each other. Equal number of slices is generated for both source and destination objects. Boundaries of both objects are extracted. The boundaries are then traversed on a 2D plane and are transformed into a cloud of contour points each. Interpolation of the corresponding source and destination contour point clouds takes place and transformed surface is reconstructed.

Item Type: Thesis (PhD)
Subjects: Q Science > QA Mathematics > QA75.5-76.95 Electronic computers. Computer science
Divisions: Pusat Pengajian Sains Komputer (School of Computer Sciences) > Thesis
Depositing User: Mr Mohammad Harish Sabri
Date Deposited: 16 Aug 2018 07:09
Last Modified: 12 Apr 2019 05:26
URI: http://eprints.usm.my/id/eprint/41350

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