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49 results about "Face hallucination" patented technology

Face hallucination refers to any superresolution technique which applies specifically to faces. It comprises techniques which take noisy or low-resolution facial images, and convert them into high-resolution images using knowledge about typical facial features. It can be applied in facial recognition systems for identifying faces faster and more effectively. Due to the potential applications in facial recognition systems, face hallucination has become an active area of research.

Local restriction iteration neighborhood embedding-based face hallucination method

ActiveCN103208109AStrong discriminationIndicates that the coefficients are accurateImage enhancementFace hallucinationImage resolution
The invention relates to a local restriction iteration neighborhood embedding-based face hallucination method. The method comprises the following steps of: establishing high-resolution and low-resolution image block sets to be used as high-resolution and low-resolution image block dictionaries; sampling on inputted image blocks of a low-resolution face image to obtain estimation high-resolution image blocks, seeking K nearest image blocks at the corresponding position in the high-resolution image block dictionary, and expressing the inputted low-resolution image blocks by using the corresponding K low-resolution image blocks to acquire a weight coefficient; reconstructing K neighbor high-resolution image blocks by utilizing the weight coefficient to form new estimation high-resolution image blocks, and performing the operation repeatedly until the most satisfied estimation high-resolution image blocks are obtained; and integrating into a high-resolution image according to the positional relations of the low-resolution image blocks. According to the method, two manifold structures are considered simultaneously on the basis of position apriority and local manifold restriction, and K neighbor points and reconstruction weights are updated continuously in an iteration form on the basis of a result of last reconstruction to achieve a high-quality reconstruction effect which is close to the real condition.
Owner:WUHAN UNIV

Face super-resolution method and system based on fusion attention mechanism

The invention discloses a face super-resolution method and system based on a fusion attention mechanism, and belongs to the field of face image super-resolution. The method comprises the steps of down-sampling a high-resolution face image into a target low-resolution face image, carrying out partitioning operation, separating out image blocks which are overlapped with each other, and extracting superficial features by using a superficial feature extractor; fusing features of pixel, channel and space triple attention modules, and enhancing reconstructed face structure details; constructing a fusion attention network as a deep feature extractor, inputting the superficial facial features into the fusion attention network to obtain deep features, wherein the fusion attention network includes a plurality of fusion attention groups, each fusion attention group includes a plurality of fusion attention blocks; and performing up-sampling on the deep feature map, and reconstructing the face feature map subjected to up-sampling into a high-resolution face image of the target. The method is superior to other latest face image super-resolution algorithms, and face high-resolution images with higher quality can be generated.
Owner:WUHAN INSTITUTE OF TECHNOLOGY +1

Three-dimensional face super-resolution method based on multi-frame point cloud fusion and variable model

The invention discloses a three-dimensional face super-resolution method based on multi-frame point cloud fusion and a variable model. The method comprises the following steps: S1, acquiring a video frame depth image and a point cloud sequence Pi belonging to P; s2, calculating a rough fitting result of the variable model by taking the average face as a template and Pi as a target point cloud, andobtaining a first rough fitting score; s3, screening the Pi according to the first rough fitting score to obtain a successfully detected point cloud set Pf; s4, taking a first point cloud P0 in the Pf as a target point cloud, taking all the rest face point clouds Pr in the Pf as templates, and respectively registering the P0 to obtain a second rough fitting score; s5, screening Pr according to the second rough fitting score, converting the screened point cloud to the position where P0 is located, and Palign = {P0, Pj0} is obtained; s6, converting the Palign to obtain a smooth fusion point cloud Pfusion; s7, performing variable fitting on the object Pk in the Palign by using a three-dimensional face variable model, and generating a variable model face fusion point cloud Mavg; and S8, fusing the Pfuse and the Mavg to obtain a three-dimensional human face super-resolution point cloud Poutput. According to the invention, the high-precision face point cloud can be obtained.
Owner:陕西西图数联科技有限公司
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