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When the sample size and participating centers increase, the traditional paper-based management approach has been unable to adapt to the requirements of the development of clinical trial. Clinical trial collaboration and management system (CTCMS) was developed independently. It was adopted in the practice of clinical trial management. CTCMS is a web-based multi-center clinical trial management software...
With the further development of information technology, web application, built in the traditional object-oriented way, is becoming difficult in application's upgrades and changes. In general, the application breaks down into independent modules by functionality, each of them is used to deals with specific business logic, is an effective and graceful design. The module's feature of high cohesion ensures...
In view of the nonlinear image information loss and lack of characteristics which is caused by principal component analysis in the feature extraction process, an X-ray chest image feature extraction method based on KPCA is proposed. Original feature space is mapped by kernel function to a new space where dimension reduction is implemented and features are extracted, and then nonlinear information...
Region duplication forgery is one of the tampering techniques that are frequently used, where a part of an image is copied and pasted into another part of the same image. In this paper, a phase correlation method based on polar expansion and adaptive band limitation is proposed for region duplication forgery detection. Our method starts by calculating the Fourier transform of the polar expansion on...
With the development of image processing technology, computer-aided diagnosis technology has been widely used in digital chest radiographs lesions detection. As the special nature of medical image, the complexity of image information, and especially the interference of lung vessels and bone cause great difficulties in the texture analysis of lung parenchyma. A new ribs segmentation method is proposed...
In content-based multimedia information retrieval, image and video information are usually described by high-dimensional vector, if using a linear scanning approach to search for those feature vectors will undoubtedly increase the cost of calculating, so the approximate vector indexing method and clustering method are used in conjunction in this article to make use of high-dimensional indexing techniques...
Use the chest radiographs for study,a new image retrieval method based on multi-band wavelet transformation is presented. Firstly,an image is decomposed by multi-band wavelet and the coefficients of each component are extracted; Secondly,row modulus maxima density,column modulus maxima density and modulus maxima energy of each component are computed by analyzing the coefficients,and the eigenvector...
For the purpose of taking good use of the diagnosis obtained from medical experts and improving the accuracy of chest X-ray images retrieval, the lung fields are segmented and interested regions are marked off on the basis of chest X-ray images having been processed previously; the Gray Difference Statistics is used to indicate the texture feature of each region. Using the K-nearest neighbor classifier,...
This paper focuses on the multiple attribute decision making problems with the attribute values being numeric, uncertain fuzzy selected subset and linguistics variable evaluations. For the fuzzy selected subset attribute values, by calculating the fuzzy preference relation between them and the quantifier guided dominance degrees of them can be obtained as their single-point evaluations. For the linguistics...
The dominant color descriptor (DCD) is widely applied in the image retrieval taken as one of MPEG-7 color descriptors. DCD describes the representative color distributions and features in an image or a region of interest through an effective, compact and intuitive format. A novel image retrieval method based on the fixed number's MPEG-7 dominant color descriptor is proposed. The feature extraction...
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