A radar image speckle noise suppression method based on correlation loss convolutional neural network

Abstract

The invention discloses a radar image speckle noise suppression method based on a correlation loss convolutional neural network, comprising: inputting a radar image into a trained convolutional neural network to obtain a result image suppressing speckle noise; a training method of the convolutional neural network It includes: superimposing speckle noise on the remote sensing image to obtain the superimposed speckle noise image, inputting the superimposed speckle noise image into the convolutional neural network, and obtaining the training output image; according to the mean square error of the remote sensing image and the training output image, the error loss is obtained , use the cross-correlation coefficient between the remote sensing image and the training output image to obtain the correlation loss; use the error loss and the correlation loss to perform backpropagation to update the weight parameters of the convolutional neural network; and then obtain the trained convolutional neural network. The invention utilizes the error loss and the correlation loss to update the weight parameter of the convolutional neural network, thereby effectively improving the radar image speckle noise suppression effect of the network.

Description

technical field [0001] The invention belongs to the field of radar image processing, and more specifically relates to a radar image speckle noise suppression method based on a correlation loss convolutional neural network. Background technique [0002] Radar plays a very important role in many fields of military and civilian use. Moreover, with the continuous upgrading of radar imaging technology and the improvement of radar image resolution, its application range is also expanding. [0003] However, due to its inherent radar imaging mechanism, radar images usually have speckle noise. Speckle noise is usually a kind of multiplicative noise, which is caused by mutual interference of echo signals scattered by several reflection points in each resolution unit. Speckle noise has caused great troubles to subsequent processing and information extraction, greatly affecting the practical performance of radar images. [0004] At present, in the field of radar image speckle noise su...

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Problems solved by technology

[0005] Aiming at the above defects or improvement needs of the prior art, the present invention provides a radar image speckle noise suppression method based on a correlation loss convolutional neural network, thus solving the lack of self-adaptability of the prior art and the poor expressiveness of the model. Weak, unable to effectively suppress the technical problem of speckle noise

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