Browsing by Author "TSAI Wen-Hsiang"

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DATA HIDING METHOD VIA REVISION RECORDS ON A COLLABORATION PLATFORM
(2015-11-12)
LEE Ya-Lin
;
TSAI Wen-Hsiang
The present invention provides a data hiding method via revision records on a collaboration platform, which first creates a collaborative database including a plurality of articles and revision records. A user puts as input a cover document, a secret message, and a key on a collaboration platform. Based on four characteristics of multi-user collaborative-writing processing, the collaborative-writing platform is used, together with a key, to hide a secret message into the cover document automatically while simulating a collaborative-writing process and generate a stego-document where the secret message is hidden. Only authorized users with the key can extract the right secret message from the stego-document i.e. the message-hidden document successfully.
SAND ART SIMULATION SYSTEM AND METHOD
(2015-07-09)
CHEN Peng-Yu
;
WONG Sai-Keung
;
TSAI Wen-Hsiang
The present invention provides a sand art simulation system and method, which transfers an image into sand art. Analyze contour lines and feature points of objects in the image to find out which contour line can be drawn at the same time. Divide the image into a plurality of blocks, and analyze sand spilling ways at each block. Simulate sand floating in the air, moving and heaping to make a sand-spread plane. Then draw the contour lines on the sand-spread plane to show the sand art of the image.
SCENE IMAGING METHOD USING A PORTABLE TWO-CAMERA OMNI-IMAGING DEVICE FOR HUMAN-REACHABLE ENVIRONMENTS
(2014-03-27)
KUO Yu-Tung
;
TSAI Wen-Hsiang
A scene imaging method using a portable two-camera omni-imaging device for human-reachable environments is disclosed. Firstly, an upper omni-image and a lower omni-image of at least one scene are captured. Next, image inpainting and image dehazing perform on the upper omni-image and the lower omni-image. Next, image unwrapping performs on the upper omni-image and the lower omni-image by a pano-mapping table, so as to form an upper panoramic image and a lower panoramic image respectively, and the upper panoramic image and the lower panoramic image respectively have an upper part and a lower part overlapping each other. Finally, a data item on the upper part and the lower part is obtained by view points of the scene and the pano-mapping table, thereby stitching the upper and lower panoramic images.