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168results about How to "Increase salience" patented technology

Deep residual network-based semantic mammary gland molybdenum target image lump segmentation method

The invention discloses a deep residual network-based semantic mammary gland molybdenum target image lump segmentation method. The method comprises the following steps of: labelling pixel categories of lumps and normal tissues corresponding to a collected mammary gland molybdenum target image so as to generate label images, and dividing the mammary gland molybdenum target image and the corresponding label images into training samples and test samples; preprocessing the training samples to form a training data set; constructing a deep residual network, and training the network by utilizing thetraining data set, so as to obtain a deep residual network training model; after a to-be-segmented mammary gland molybdenum target image lump is preprocessed, carrying out binary classification and post-processing on a pixel of the to-be-segmented mammary gland molybdenum target image by utilizing the deep residual network training model, and outputting lump segmentation image to realize semanticsegmentation of the mammary gland molybdenum target image lump. The method is capable of effectively improving the automatic and intelligent levels of mammary gland molybdenum target image lump segmentation, and can be applied to the technical field of assisting radiologists to carry out medical diagnosis.
Owner:ZHEJIANG CHINESE MEDICAL UNIVERSITY

Video compression method based on convolutional neural network and HEVC compressed domain significant information

The invention discloses a video compression method based on a convolutional neural network and HEVC compressed domain significant information. The video compression method based on the convolutional neural network and the HEVC compressed domain significant information improves and strengthens the HEVC from two aspects of a video saliency algorithm based on an attention mechanism and a perception preferred video compression algorithm; in the aspect of the video saliency, the method combines motion estimation results of each CU in the HEVC compression process on the basis of the convolutional neural network to adaptively integrate the two in a dynamic condition, so as to complete the saliency detection of an input video; in the aspect of the perception preferred video compression algorithm,a corresponding QP is selected according to a significant value of the CU, so that the CU with a higher significant value can be encoded with a smaller QP, and the saliency feature of the current CU block is incorporated into a traditional rate distortion calculation method, so as to achieve the purpose of perception priority. The video compression method based on the convolutional neural networkand the HEVC compressed domain significant information reduces the perception redundancy of the video and thus obtains a better compression effect.
Owner:小象智跑(重庆)创新科技有限公司

Image processing method and apparatus, and server

Embodiments of the invention disclose an image processing method and apparatus, and a server. The method comprises the following steps of obtaining a to-be-processed human face image; inputting the human face image to a convolutional neural network model with a loss function, wherein the loss function directionally screens and increases a between-class distance after image classification accordingto a preset expectation; and obtaining classification data output by the convolutional neural network model, and according to the classification data, performing content understanding on the human face image. The new loss function is established on the convolutional neural network model and has the effect of screening and increasing the between-class distance after the image classification; and the between-class distance of the classification data output by the convolutional neural network model obtained by training through the loss function is increased, so that the between-class distance inan image identification process is increased, the saliency of difference between images is remarkably improved, the image comparison accuracy is remarkably improved, and the security of applying theimage processing method is effectively guaranteed.
Owner:BEIJING DAJIA INTERNET INFORMATION TECH CO LTD

Three-dimensional point cloud data instance segmentation method and system in automatic driving scene

The invention provides a three-dimensional point cloud data instance segmentation method and system in an automatic driving scene. The method comprises steps of carrying out the preliminary recognition and division of an outdoor street scene through the spatial position information of a target object, and forming a point cloud visual column of an interested region; visual column point clouds containing objects and negative sample visual column background point clouds distributed in the same way are extracted from the point cloud visual columns of the region of interest to form a visual columnpoint cloud data set; and extracting high-dimensional semantic feature information of an object contained in each visual column point cloud in the visual column point cloud data set, and meanwhile, introducing a multi-classification focus loss function with a weight to obtain a category to which each point cloud in the visual column belongs, thereby realizing instance segmentation of the point cloud data. According to the three-dimensional point cloud data instance segmentation method in the automatic driving scene, target detail feature expression can be effectively enhanced so that the prediction capability of point cloud difficult samples can be enhanced and the performance of point cloud instance segmentation in the automatic driving scene can be enhanced.
Owner:SHANGHAI JIAO TONG UNIV

SAR image registration method based on multi-scale image block characteristics and sparse expression

The invention discloses an SAR image registration method based on multi-scale image block characteristics and sparse expression, and mainly solves the problem that an existing registration method is poor in effect when applied to SAR image registration. The SAR image registration method comprises the steps of: 1) inputting two SAR images, selecting any one as a reference image, and using the other one as an image to be registered; 2) selecting characteristic points of the reference image; 3) utilizing the multi-scale image block characteristics to construct characteristic point descriptors of the reference image and the image to be registered; 4) establishing matching point pairs between the reference image and the image to be registered; 5) removing abnormal points in the matching point pairs; 6) establishing an affine transformation model according to the finally obtained matching point pairs, adopting a least square method to obtain geometric deformation parameters, and obtaining a registration result. Compared with the prior art, the robustness to spot noise is improved, the accuracy and the matching precision of the matching point pairs are improved, and the SAR image registration method can be applied to image fusion and change detection.
Owner:XIDIAN UNIV

Saliency detecting method applied to static image human segmentation

The invention discloses a saliency detecting method applied to static image human segmentation. The method comprises the following steps of performing superpixel segmentation on a static image to be detected; performing face detection on the image after the superpixel segmentation to acquire a face area; performing skin color detection on the face area to acquire skin color information; performing color uniqueness calculation and color spatial distribution calculation according to the skin color information to acquire a color uniqueness value with the skin color information fused therein and a color spatial distribution value with the skin color information fused therein; performing saliency calculation according to the acquired color uniqueness value and the color spatial distribution value to acquire a saliency map used for static image human segmentation. Based on a conventional saliency detecting method, the method provided in the invention makes the skin color well detected by making the skin color information fused in the color uniqueness calculation and color spatial distribution calculation. The human skin color saliency is enhanced. Better and more accurate static image human segmentation effects are achieved. The method can be widely applied to the image processing field.
Owner:GUANGDONG UNIV OF TECH

Automatic detection method of salient object based on salience density and edge response

The invention provides an automatic detection method of a salient object based on salience density and edge response, and relates to a method for automatically detecting the salient object, solving the problems of the convectional salient object detection method that only one attribute that is the salience is utilized, but the edge attribute of the salient object is not taken into account, therefore, the detection accuracy of the salient object is relatively low. The automatic detection method of the salient object based on the salience density and the edge response comprises the following steps of: calculating and generating a salient map S of an input map according to the regional salience calculation method in combination of the global color comparison and the color space distribution; generating an edge response map E on the salient map S by utilizing a group of Gabor filters; efficiently searching a global optimal sub-window containing the salient object in the input map by utilizing the maximized branch-and-bound algorithm of the salience density and the edge response; adopting the obtained optimal sub-window as the input; initializing the GrabCut graphic cutting method; carrying out the GrabCut graphic cutting method; and automatically extracting the salient object with a good edge. The automatic detection method is applicable to the image processing field.
Owner:中数(深圳)时代科技有限公司
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