Downhole images provide a powerful help in solving various problems that occur during the extraction of petroleum resources.As light is scattered by particles in the water in the process of propagation,the phenomena such as decrease in contrast and color distortion occur.In order to improve the clarity of downhole images,so as to obtain more useful information.The article adopts dark channel a priori algorithm,contrast Limited Adaptive Histogram Equalization to process the original image,pixel-level image fusion for the processed image,and finally white balance and color correction for the obtained image,so as to realize down-hole image restoration.It is verified through comparison experiments that this method can effectively improve the clarity of down-hole images.
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