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According to the characteristic that the medical CT image data are area samplings, a new preprocessing approach for CT image is presented in this paper. It firstly constructs mapping relationship between area sampling and point sampling, then detect the image edge with Sobel operator, and divide the CT image into different regions based on human tissue feature, and finally, in each divided region,...
A crucial pretreatment of computing the volume of pleural effusion is to segment and extract the effusion efficiently; cubic Hermite curve fitting and bounding box technology are proposed here. The boundary points will be identified automatically as long as the central column of image is given, the tangents of boundary points are estimated by Bessel method and the curve is sure to possess the feature...
A new method for image processing, especially for image resizing, is presented. The new method produces pictures with higher precision, which is useful in 2D CT image resizing. Suppose that the given data points of an image are sampled from an original surface. The method first computes the fitting points of the original surface, then the fitting points are used to construct the interpolation surface...
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