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    • 1. 发明申请
    • IMAGE PROCESSING AND VECTORISATION
    • 图像处理和矢量
    • WO2008003944A2
    • 2008-01-10
    • PCT/GB2007/002470
    • 2007-07-03
    • THE UNIVERSITY COURT OF THE UNIVERSITY OF GLASGOWPATTERSON, JohnWILLS, Philip
    • PATTERSON, JohnWILLS, Philip
    • G06T9/20
    • G06T9/20
    • A method is provided for converting raster format image data to vector format image data comprising the step of generating contour data for a plurality of isochromic contours, whereby each isochromic contour is determined by applying a curve fitting process to a plurality of possible solution points and spatial error bounds for said solution points, wherein said solution points and error bounds are based on said raster format image data, said solution points being deemed to have colour values equal to the colour value of the contour, and the contour data is sufficient to allow reconstruction of said contour using the curve fitting process. Also provided are a method of converting raster format image data to vector format image data comprising the steps of determining a minimum set of contours to be generated by using diffusion equations to define a plurality of watersheds and generating contour data defining a contour around each watershed and methods of rendering an image from vector format image data and of determining errors in pixel colour values.
    • 提供了一种用于将光栅格式图像数据转换成矢量格式图像数据的方法,该方法包括产生多个等色阶轮廓的轮廓数据的步骤,从而通过将曲线拟合过程应用于多个等色阶轮廓来确定每个等色阶轮廓 多个可能的解决方案点和所述解决方案点的空间误差界限,其中所述解决方案点和误差界限基于所述光栅格式图像数据,所述解决方案点被认为具有等于轮廓的颜色值的颜色值,以及 轮廓数据足以允许使用曲线拟合过程重建所述轮廓。 还提供了一种将光栅格式图像数据转换成矢量格式图像数据的方法,该方法包括以下步骤:通过使用扩散方程来确定要生成的最小轮廓集,以定义多个分水岭并生成定义每个分水岭周围的轮廓的轮廓数据;以及 从矢量格式图像数据渲染图像以及确定像素颜色值错误的方法。