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�������պ����ѧѧ�� 2011, Vol. 37 Issue (12) :1494-1497    DOI:
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����1, ������1, κ����1, ���˶�2*
1. �������պ����ѧ ��е���̼��Զ���ѧԺ, ���� 100191;
2. �й�������ѧ�о�Ժ ���������ҽѧ���̼�����ѧ�о���, ���� 100013
Turbine blade DR images fusion based on bi-energy X-ray radiography
Yang Min1, Wu Meijin1, Wei Dongbo1, Li Xingdong2*
1. School of Mechanical Engineering and Automation, Beijing University of Aeronautics and Astronautics, Beijing 100191, China;
2. Division of Metrology in Ionizing Radiation and Medicine, National Institute of Metrology, Beijing 100013, China

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ժҪ Ϊ����ߵ�֡����ҶƬDR(Digital Radiography)ͼ�����Ϣ��,������2����ͬ���������¶�����ҶƬ����DR����,�Ի�ȡ��ͬ��������������Ϣ;Ȼ��2��DRͼ����ж�ֱ���С���ֽ�,�����ֲ�����Ϊ׼��Զ��ߵĵ�Ƶ�Ӵ�ͼ������ں�,�Ծֲ��ݶȵĻ�������Ϊ�߶ȶԶ��ߵĸ�Ƶ�Ӵ�ͼ������ں�;������С���ں�ϵ������任������յ��ںϽ��.ʵ��������:���ڴ˷���������ҶƬ�ں�DRͼ��Я���˸�Ϊ�ḻ��ϸ����Ϣ,�Ӷ�������ҶƬ������Ϣ�Ŀ��١�׼ȷ�ж�.
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Abstract�� In order to increase the single frame digital radiography(DR) image information of the turbine blade, two DR images were captured at different X-ray energy so as to get the turbine blade quality information at different thickness region firstly. Secondly, the two original DR images were decomposed by wavelet transform, and the maximal local variance role was used to carry out the low sub-frequenced image fusion, and the active factors based on local gradients were calculated to carry out the high sub-frequenced image fusion. Finally, through inverse wavelet transform the output image can be obtained. The experimental results show that the single frame fused turbine blade DR image brings more detailed information, so it is useful to the fast and accurate quality judgements of the turbine blade.
Keywords�� turbine blade   X-ray testing   digital radiography(DR) image fusion   wavelet transform     
Received 2010-07-27;

������Ȼ��ѧ����������Ŀ(60872080,61077011); ���ҿƼ�֧����Ŀ(2011BAI02B02)

About author: �� ��(1975-),��,�����ѳ���,������,minyang.ndt@263.net.
����, ������, κ����, ���˶�.˫��͸��ģʽ������ҶƬDRͼ���ںϷ���[J]  �������պ����ѧѧ��, 2011,V37(12): 1494-1497
Yang Min, Wu Meijin, Wei Dongbo, Li Xingdong.Turbine blade DR images fusion based on bi-energy X-ray radiography[J]  JOURNAL OF BEIJING UNIVERSITY OF AERONAUTICS AND A, 2011,V37(12): 1494-1497
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