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An edge-based approach for the segmentation of 3-D range images of small industrial-like objects is presented. It is illustrated that the gradient edge operators are mostly suitable for detecting jump boundaries. They may produce misleading responses and may also miss detecting roof edges. We also show, using numerical analysis techniques, that the residual norms of fitting planes at surface points where the residuals are measured in the z-direction have large magnitudes at the jump boundaries. At the folds or creases they have large enough magnitudes but are shifted by one pixel from the crease. We show however that the residual norms of the fitting planes where the residuals are measured in the direction normal to the planes are more suitable for detecting the various image edges. Experimental results for the segmentation of 3-D range images of small industrial-like objects, using the histograms of such residual norms are given with comments. 相似文献
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Charge and Discharge Control to Save Regeneration Energy for Overhead Line and Energy Storage Device Hybrid Power Source Three‐Level Inverter 下载免费PDF全文
YUKO ASANO YOSHIKI OHNO SOICHIRO KURITA KEIICHIRO KONDO TAKESHI SHINOMIYA KATSUMI ISHIKAWA 《Electrical Engineering in Japan》2018,202(4):41-49
Hybrid power source three‐level inverter is proposed as a main circuit system with energy storage device for increasing regenerative power. This paper proposes a charge and discharge control method to utilize the regenerated energy. The proposed method is verified by experimental tests with a scaled‐down model and numerical simulation. 相似文献
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Demonstration of Loss‐reduction Effect of the Amorphous Cores for Larger‐Capacity Transformers by Trial Manufacture 下载免费PDF全文
NAOYUKI KURITA AKIRA NISHIMIZU HISASHI MOROOKA CHIE KOBAYASHI NAOYA MIYAMOTO YOSHIO HAMADATE TAKASHI ISHIGAMI YU YAMADA KOUJI SASAKI TAKAHIRO SATAKE TETSUYA FUKUYAMA 《Electrical Engineering in Japan》2018,204(1):12-21
For the demonstration of feasibility and loss‐reduction effect of the larger‐capacity amorphous core transformers (AMT), this paper proposed the support structure and design method of the iron‐loss reduced amorphous wound cores with a weight of 7 tons. We designed and manufactured 10 MVA single‐phase test model with the cores inserted in a support cage having structures of the stress‐buffered core support, the proof electromagnetic force from the windings, and the stray loss‐reducing shields. The 50%‐loaded total loss of the test model estimated from the calculated and measured results has been reduced by 35% compared with a conventional silicon‐steel core transformer (SST) with the same power capacity. 相似文献
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