Image representation of 3-D data for Digital Microscopy Hologram and it's Compression
| Autor: | Wei-Jine Chen, 陳煒鈞 |
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| Rok vydání: | 2008 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 96 We use the layered depth image (LDI) to represent three dimensional information of the digital holographic microscope (DHM). In addition, a shape-adaptive discrete cosine transform (SADCT) and chain code algorithm are developed for the compression of texture and shape information respectively. The scene representation and data compression performance are illustrated by the computer simulation. Digital holographic microscopy (DHM) provides a numerical investigation of the third dimension by performing a plane-by-plane refocusing that overcomes the small depths of focus due to the high numerical apertures of the microscope lenses and the high magnification. The digital hologram recorded by a CCD camera can be reconstructed by the computer to obtain the original three dimensional wavefront. Digitalization provides new possibilities for a variety of applications. However, few researches discuss the scene representation of the three dimensional information of the Digital holographic microscopy. Since the digital hologram of DHM have the properties for the depth of focus: (1) For the object points with different depths, one have to reconstructed at different reconstruction distances. (2) The reconstructed image will be blurred outside the depth of focus. Based on this property, we develop the layered depth image (LDI) to represent three dimensional information of the digital holographic microscope and discuss the further processes of this representation scheme. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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