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 ...