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When a data compression and an image analysis should be taken into account as a whole, for instance, the selective compression of scanning data transmitted form a sensor on a satellite, an effective way is to combine the data compression with the image analysis organically. So far, however, only one data compression method,i.e., Fourier transform has been used in image analysing. In 相似文献
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目前已知有几种磁心一晶体三极管触发器(二进位计数元件)。磁心——三极管触发器的典型线路是由两个带交叉反馈的标准单元组成的对称线路。然而对称线路是不经济的:其中在一个触发器上或多级分频器的每位上都要用两个晶体三极管。因此怎样用一个晶体三极管组成触发器就具有很大意义。在文献中懂介绍了这类线路的一种,如图1中所示。 相似文献
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线性八元树提供一种非常紧凑并适于传统客体处理运算的三维客体体积表示法。然而,利用体积交技术由正交三轮廓图生成三维客体的线性八元树表示取决于观察点。匹配客体到模型达到识别目的需要客体表示独立于观察点。为了得到独立于观察点的表示,应通过计算惯量矩阵的特征向量确定客体的三个主轴。线性八元树投影到三个主视(沿着主轴)的图象平面上得到三个标准线性四元树。客体匹配包括两步过程:第一步是利用对称差的度鞋匹配待识别客体的标准线性四元树到库中一模型子集;第二步是生成客体和这些候选模型的标准线八元树,然后匹配待识别客体的标准线性八元树到具有最小对称差的模型。 相似文献
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IDENTIFICATION OF 3-D OBJECTS FROM THREE ORTHOGONAL SILHOUETTES USING NORMALIZED LINEAR QUAD-OCTREES
Linear octrees offer a volume representation of 3-D objects, which is quite compactand lends itself to traditional object processing operations. However, the linear octree structurefor generating the representation of 3-D objects from three orthogonal silhouettes by using thevolume intersection technique is dependent on viewpoints. The recognition achieved from match-ing object representations to model representations requires that the representations of objectsare independent of viewpoints. In order to obtain independent representations of viewpoints,the three principal axes of the object should be obtained from the moment of inertia matrix bycomputing its eigenvectors. The linear octree is projected onto the image planes of the three prin-cipal views (along the principal axes) to obtain the three normalized linear quadtrees. The objectmatching procedure has two phases: the first phase is to match the normalized linear quadtrees ofthe unknown object to a subset of models contained in a library utilizing a measure of symmetricdifference; the second phase is to generate the normalized linear octrees of the object and theseselected models and then to match the normalized linear octree of the unknown object with themodel having the minimum symmetric difference. 相似文献
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为适于处理星上遥感扫描数据,本文对遥感图象实时处理系统进行了探讨;从优化系统的角度出发,对基于微机控制的软、硬件设计统筹进行了考虑;最后,获得了满意的试验结果。 相似文献
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本文讨论了图象标记问题的基本概念,给出基于松弛算法的图象标记方法的形式化描述。将Hopfield神经网络模型用于解决图象标记问题,描述了网络结构、能量函数、联结强度以及输出函数。 相似文献
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