| Summary: | 碩士 === 國立東華大學 === 資訊工程學系 === 95 === This thesis presents data hiding schemes for lossless compression of medical images.
The scheme is based on the vertex representation of 3D model, considering
the vertex index as a message block and embedding the message in vertices by rearranging
the vertex index in ordered vertex list of a 3D cover model. We propose
two embedding procedures, dynamic segmentation (DS) and static segmentation
(SS) embedding methods, each best for a respective type of message distribution.
The performance of the proposed approaches, for the lossless compression
of medical image sets, such as MRI, CT, and PET, is evaluated and compared with
the DICOM raw and lossless JPEG images respectively. The proposed schemes
compress the input medical image set and have smaller file size. With size reducing,
the proposed methods save the storage space requirement much.
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