In order to increase the digital radiography(DR) image information of the object with uneven thickness,a fusion method based on wavelet transform on two DR images of different X-ray energy was introduced.Firstly,the input images were decomposed by wavelet transform.Secondly,the weighted average method was used to choose the weight coefficients of low frequency sub-image.And the eight directional masks were used to detect the local gradients.On the basis of the local gradients the fused high frequency coeffi...
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