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1. 发明授权

US4290084A Method and means for preserving original continuity/discontinuity among same colored pel clusters upon array compression 失效
标题翻译：用于在阵列压缩时保持相同彩色像素簇之间的原始连续性/不连续性的方法和装置
公开(公告)号：US4290084A
公开(公告)日：1981-09-15
申请号：US077698
申请日：1979-09-21
申请人： John F. Minshull , Pavel Brazdil
发明人： John F. Minshull , Pavel Brazdil
IPC分类号： H04N1/393 , G06F3/153 , G06K9/54 , G06T3/00 , G06T3/40 , G06T5/30 , H04N1/411 , H04N1/00
CPC分类号： G06T3/4023 , G06K9/54 , G06T3/403 , G06T5/30 , H04N1/411 , G06K2209/01
摘要： Data manipulation apparatus is described for converting raster-scanned data received, for example, from a scanner 2 at a first picture element (pel) resolution to a second lower pel resolution for display, for example, on a CRT terminal 4. The apparatus includes a scale-changing means 8 which functions to replace selected subgroups of pels in the input image by single pels at its output. The significance of each single pel reflects the presence or absence of a pel representing part of an image object in the associated subgroup of pels. The number of pels in the selected subgroups are determined by the degree of compression required to convert to the lower pel resolution. Prior to scale change, the apparatus functions to modify the input data in order to minimize merging of adjacent image objects as a result of scale change and thereby improve the legibility of the output image at the lower resolution. The scanned data is first supplied to a data sensitive thinner 5 which detects narrow gaps between adjacent objects and selectively detects image object edge pels in order to widen the gap. The selectively thinned scanned data is then supplied to a further thinner 6 which removes excess image pels from selected edges of the image objects. The data from thinner 6 is then supplied to a data sensitive merge inhibit unit 7 which moves selected image object pels from a subgroup in which merging as a result of scale change will occur to an adjacent subgroup where merging will not occur. Removal of a pel by the selective thinner 5, or by the thinner 6 or movement of a pel by unit 7 is inhibited if to do so would result in fragmentation of the associated image object.
摘要翻译：描述了数据处理装置，用于将例如从第一像素（像素）分辨率的扫描仪2接收的光栅扫描数据转换为例如CRT终端4显示的第二较低像素分辨率。该装置包括缩放变化装置8，其功能是通过其输出处的单个像素来替换输入图像中的选定的像素组。每个单个像素的意义反映了表示在相关联的子组中的图像对象的一部分的像素的存在或不存在。所选子组中的像素数由转换为较低像素分辨率所需的压缩程度决定。在缩放比例变化之前，该装置用于修改输入数据，以便最小化作为缩放变化的结果的相邻图像对象的合并，从而提高输出图像在较低分辨率下的易读性。扫描数据首先被提供给数据敏感薄膜5，其检测相邻对象之间的窄间隙并选择性地检测图像对象边缘像素以扩大间隙。然后将选择性变薄的扫描数据提供给更薄的6，其从图像对象的选定边缘去除多余的图像像素。然后将来自较薄6的数据提供给数据敏感合并禁止单元7，该单元7将所选择的图像对象像素从其中将发生缩放改变的结果的合并到将不会发生合并的相邻子组发生。如果这样做会导致相关图像对象的碎裂，则可以抑制由选择性稀释剂5去除像素，或者通过单元7的较薄的6或像素的移动去除像素。

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