Abstract: This paper refers to the dark channel dehazing image enhancement technology. Combining the characteristics of CFRP molded parts DR digital ray image, and analyzing the image enhancement effects under different filter radius and defogging coefficient, and obtaining reasonable image enhancement parameters, the product is successfully applied to the DR digital imaging detection. The results show that the method can effectively reduce the contrast change caused by the thickness difference of the workpiece in the DR image, reduce the background noise in the workpiece, and highlight the defect information in the workpiece, so that the enhanced image has better visual effect. This makes it possible to basically unify the evaluation window for different types of defects. It reduces the number of times that the traditional DR image evaluation needs to adjust the window, effectively improves the work efficiency and the accuracy of the film reviewer, and has great reference value and guiding significance in practical engineering applications.

Key words: dark channel, CFRP molded parts, DR digital imaging, visual effects