• Journal of Korea Multimedia Society
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• v.16 no.7
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• pp.852-861
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• 2013

When users use medical volume rendering applications, selecting specific region of volume data and observing the region by magnification is a common process.As the wood-grain artifact is arise from the magnified image, the jittered sampling technique has been used to remove the problem. However, the jittered sampling leads to some noise along the volume edge. In this research, we reveal the reason of the noise, and present a solution. To remove the wood-grain artifact without the noise, we propose the empty space jittering and the sampling alignment method. Using these methods, we can produce high quality volume rendering images without noticeable time consuming.

• Journal of the Korea Academia-Industrial cooperation Society
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• v.7 no.3
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• pp.506-511
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• 2006

Silver is one of the most appropriate Jewelry materials for Jewelry casting and bench working. The technique known as 'Mokumegane' is good for making silver jewelry with natural patterns, such as wood grain patterns, but the process is not easy for silversmithing because it requires complicated and heavy labour. Instead of using conventional Mokumegane technique, we propose a new modified silver-copper casting process that enables a similar surface effect with good metal bonding strength between silver and copper. Simply pouring the molten silver into pre-aligned copper granules or 0.5 mm to 1.5 mm-thick copper sheets leads to well embedded copper silver ingots. The rolled silver plates from those ingots show excellent bonding interface even after the silver plate rolled ten times. We successfully fabricated prototype rings with copper embedded silver plates. Our result implies that our newly proposed process nay be a simpler way to fabricate silver jewelry with a pseudo-Mokumegane effect.

• Journal of Conservation Science
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• v.33 no.1
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• pp.11-16
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• 2017

This study reviews the structure of wooden printing blocks in Japan, focusing on the blocks as three-dimensional objects. Inspection is more effective three-dimensionally than two-dimensionally, and for the first time in wooden printing block research, the study uses a 3D CT scanner and a high-resolution 3D digitizer. The 3D CT scanner examines cross sections of the blocks and identifies their grain and contents, including insects surviving within them. The 3D digitizer enables observation of objects up to 0.02 mm; this allows detailed collection of block surface information, which is difficult to identify with a conventional microscope.