Multi-voltage Digital Radiography images fusion based on gray consistency

Fixed-voltage Digital Radiography(DR) image has over-exposed or under-exposed regions since dynamic range of the imaging device is not enough when testing a composite component with a complicated internal structure. Some structure information of the composite component is lost. This problem can be solved by fusing the multi-voltage DR images. A multi-voltage DR images fusion model is proposed based on the gray consistency of the images. It adaptively determines the weights of all images by solving the model. What's more, this method is without prior knowledge. The experiment shows the new method can reconstruct the whole information of the complicated structural component. Also the new method has higher fusion efficiency because of no prior knowledge.