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Super-resolution image reconstruction method based on coupled partial differential equation model

A partial differential equation, low-resolution image technology, applied in the field of super-resolution image reconstruction based on coupled partial differential equation model, to achieve the effect of improving quality and improving visual effects

Inactive Publication Date: 2013-12-25
杨勇
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However, it still smoothes some edge details compared to the TV model

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  • Super-resolution image reconstruction method based on coupled partial differential equation model
  • Super-resolution image reconstruction method based on coupled partial differential equation model
  • Super-resolution image reconstruction method based on coupled partial differential equation model

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Embodiment Construction

[0022] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

[0023] Building a Super-resolution Reconstruction Framework Model Based on Hybrid Regularization

[0024] The regularized reconstruction method can use the prior knowledge of the spatial domain to constrain the smoothness of the reconstructed image, but the selection of the regularization term, that is, the selection of prior constraints is the key to this method. The reconstructed image obtained by the existing regularization method has over-smoothing phenomenon, which leads to the loss of some details of the image, which is not good for the post-processing of the image. This patent uses the coupled model of TV and FPDE as a regularization item to perform super-resolution image reconstruction. This coupling model can not only ensure the fidelity of the flat area of ​​the image, better suppress the generation of the ...

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Abstract

The invention discloses a super-resolution image reconstruction method based on a coupled partial differential equation model. According to the reconstruction method, two partial differential models are coupled through defining a weighting function by utilizing the respective advantages of TV (Total Variation) and FPDE (Fourth Partial Differential Equation) in image restoration, a large weight is adopted for a TV model at an image edge area so as to maintain the edge and texture details of images, the large weight is adopted for an FPDE model at an image flatness area so as to inhibit a staircase effect generated by the TV model, new models serve as normalization items to reconstruct a super-resolution images, and the visual effect of image reconstruction can be enhanced.

Description

technical field [0001] The invention relates to an image super-resolution reconstruction method, in particular to a super-resolution image reconstruction method based on a coupled partial differential equation model. Background technique [0002] Due to the insufficient number of low-resolution images and the fuzzy operation of ill-conditioned conditions, the super-resolution image reconstruction method is ill-conditioned. Partial Differential Equations (PDE) have received widespread attention because they can overcome the ill-conditioned problem of super-resolution reconstruction, and have good noise reduction and edge preservation capabilities. According to the forward model of the degraded image sequence, this kind of method uses the prior knowledge of image and blur as the regularization to construct the regularized minimization functional, and solves the minimization functional to obtain high-resolution images. [0003] The Total Variation method (Total Variation, TV) ...

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Application Information

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IPC IPC(8): G06T5/50G06T7/20
Inventor 杨勇黄淑英
Owner 杨勇
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