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The registration of medical images with local deformation is a difficult problem, especially the images to be registered not only have local deformation but also have great difference in gray-scale distribution. It is a excellent method to solve this problem by adding the Euclidean Distance Metric based on landmark points as the penalty term to the Intensity-based metric in the registration. In this...
In order to assist doctors in predicting the pathological information of hepatocellular carcinoma (HCC) using magnetic resonance imaging (MRI), we proposed an automatic histological grading method of HCC based on adaptive weighted multi-classifier fusion in this paper. First, five sets of texture features were extracted for each region of interest (ROI), corresponding to first order statistics, gray-level...
Multi-sensors fusion to construct an accurate 3D map about unknown indoor scene and outdoor in the simultaneous localization and mapping (SLAM) area is becoming increasingly popular. In this paper our methods pay an attention to how to optimize the 2D map from the indoor or outdoor unknown large-scale environment and how to make the 3D map intuitive and accurate. Firstly, this paper accomplished the...
Target tracking has always been a hot research topic in the field of computer vision. Tracking-Learning-Detection (TLD) is a new algorithm for online learning tracking proposed by Zdenek Kalal. In the algorithm, the computation consuming of detection module is relatively large. To solve this problem and improve the algorithm, we proposed an online learning method to adaptively update the threshold...
The algorithm based on SIFT feature matching and Kalman filter has been used for digital video stabilization, it is efficient in many applications. However, video obtained by the method is still not stable. An improved scheme in motion filtering is proposed in this paper. The scheme is that global motion vector estimated by Kalman filter is filtered by an ideal low-pass filter with the Hanning window,...
Based on HSV color model, a method of object-based spatial-color feature (OSCF) for color image retrieval is proposed. Firstly, objects are extracted from color image based on our previous algorithm. Then image features are represented by objects in it. Color and spatial-color feature are adopted for description of objects. The new method only pays attention to main central objects. For images whose...
Many computer vision applications, such as object recognition and content-based image retrieval could function more reliably and effectively if regions of interest were isolated from their background. A new method for regions of interest extraction from color image based on visual saliency in HSV color space is proposed in this paper. Color saliency is calculated by a two-dimensional sigmoid function...
Based on HSV color model, a method of color image segmentation by automatic seed selection and region growing is proposed. The non-edge and smoothness at pixel's neighbor are used as criterion to determine automatically which ones are seed pixels. The seed pixels are merged to form seed region if they are connected. A seeded region growing method is used to segment the image based on seed regions...
With the development of content-based multimedia systems, there is a need for automatic extraction of central object from natural color images. A new method for automatic extraction of central object is presented in this paper. First, a criterion of homogeneity based on both the global and the local information for HSV color images is proposed, and is used to get the "E-image". The high...
Aimed at the application requirements of content-based image retrieval technology on the Internet, firstly, some key techniques and application ways are researched, then the principles and methods how to reduce the ??gap?? between low-level visual features and high-level semantic description of image are analyzed for improving the efficiency and precision of image retrieval. At last, taken several...
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