Super-resolution sparse reconstruction method based on discriminative canonical correlation
A super-resolution and sparse reconstruction technology, applied in image data processing, instrumentation, computing, etc., can solve problems such as lack of discrimination and insufficient use of class label information
Active Publication Date: 2016-11-09
刘姣姣
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On the other hand, the CCA used by Huang's method is unsupervised, does not fully utilize the class label information of the training samples, and lacks certain discrimination
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[0041] In order to clarify the purpose, technical solutions and advantages of the present invention, the present invention will be further described in detail below in conjunction with specific embodiments and accompanying drawings.
[0042] refer to figure 1 , the specific implementation process of the present invention comprises the following steps:
[0043] (1) First, training samples for high-resolution images and corresponding low-resolution image samples Use principal component analysis (PCA) to extract the global features of high and low resolution face images, and obtain the projection vector P in the PCA subspace H ,P L , and its corresponding principal component X H 、X L . For the extracted PCA score vector X H 、X L , which is mapped to the relevant subspace of DCCA, and the corresponding projection vector C can be obtained by maximizing the criterion formula of DCCA H 、C L and score vector V H and V L .
[0044] Next, input a low-resolution test sampl...
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The invention provides a sparse face super-resolution reconstruction method based on discriminative canonical correlation. The extracted high and low resolution image features are projected to correlation subspaces by using supervised canonical correlation analysis, and neighborhood reconstruction is performed in the correlation subspaces by using sparse neighbor selection. The sample intra-class and inter-class correlation is fully considered, and supervision information is added so that the extracted features are enabled to be more discriminative, and the corresponding high-resolution images of test samples can be better reconstructed. Meanwhile, the sparse selection method is used in reconstruction neighbor selection, and the appropriate neighbors are self-adaptively selected for reconstruction according to the correlation of different training samples and the test samples so that the recovered global face images can be obtained. Compensation of detail information is performed by using the method and the idea of two-step method neighborhood reconstruction so that the high-resolution residual error images are reconstructed, and the global face images and the residual error images are added and thus the final high-resolution face images are obtained.
Description
technical field [0001] The invention relates to an image super-resolution reconstruction method. Specifically, it is a face image super-resolution sparse reconstruction method based on discriminant canonical correlation analysis, which can be applied to the fields of pattern recognition, data mining and image processing. Background technique [0002] Super-resolution (Super-resolution, SR) is an emerging technology that uses hardware or software to improve image resolution. By inputting one or more sets of low-resolution (Low Resolution, LR) images, they are processed by related algorithms. Finally, a set of high-resolution (High Resolution, HR) images are obtained. The use of super-resolution technology can achieve the purpose of improving the spatial resolution of images without changing the imaging system. , image registration, image quality evaluation and other research progress played a role in promoting. Super-resolution technology has broad application prospects, s...
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CPCG06T3/4053
Inventor 葛洪伟周梦璇李莉朱嘉钢
Owner 刘姣姣