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A quick and accurate extraction of dominant colors of background images is the basis of adaptive camouflage design. This paper proposes a Color Image Quick Fuzzy C-Means (CIQFCM) clustering algorithm based on clustering spatial mapping. First, the clustering sample space was mapped from the image pixels to the quantized color space, and several methods were adopted to compress the amount of clustering samples. Then, an improved pedigree clustering algorithm was applied to obtain the initial class centers. Finally, CIQFCM clustering algorithm was used for quick extraction of dominant colors of background image. After theoretical analysis of the effect and efficiency of the CIQFCM algorithm, several experiments were carried out to discuss the selection of proper quantization intervals and to verify the effect and efficiency of the CIQFCM algorithm. The results indicated that the value of quantization intervals should be set to 4, and the proposed algorithm could improve the clustering efficiency while maintaining the clustering effect. In addition, as the image size increased from 128 × 128 to 1024 × 1024, the efficiency improvement of CIQFCM algorithm was increased from 6.44 times to 36.42 times, which demonstrated the significant advantage of CIQFCM algorithm in dominant colors extraction of large-size images. 相似文献
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为了进一步推进深度学习技术驱动的视觉语音生成相关科学问题的研究进展,阐述了视觉语音生成的研究意义与基本定义,并深入剖析了该领域面临的难点与挑战;在此基础上,介绍了目前视觉语音生成研究的现状与发展水平,基于生成框架的区别对近期主流方法进行了梳理、归类和评述;最后探讨视觉语音生成研究潜在的问题和可能的研究方向。 相似文献
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MgO细度对磷酸镁水泥性能的影响 总被引:1,自引:0,他引:1
通过将MgO球磨0,10,20,30,60 min,制备出不同细度的MgO,考察不同细度的MgO对磷酸镁水泥净浆强度、凝结时间、流动度、水化温度和收缩性能的影响.结果表明MgO颗粒存在最佳级配体系;要保证施工的可操作时间和良好的流动性,MgO颗粒比表面积应控制在1 700~1 800 cm2/g,中值粒径控制在85~90 μm;对磷酸镁水泥温度峰值起决定作用的是小于20 μm的MgO颗粒;改变MgO颗粒的级配可以降低磷酸镁水泥的收缩率,改善体积稳定性. 相似文献
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在微波高频段,海面背景或海上船类目标往往具有电大尺寸和复杂精细的结构,这给船海复合场景的电磁建模带来巨大的计算负担。为简化计算,基于海面电磁散射模型面元化思想和图形电磁学,结合计算耦合场的四路径模型,提出一种电大尺寸船海复合场景电磁散射的快速计算方法。在保证海面与目标复合散射场的计算准确性前提下,提高计算效率。仿真并分析不同雷达参数下动态海面与目标的雷达散射截面,计算结果与实测数据以及精确数值方法结果的良好一致性验证了方法的准确性。将复合散射快速计算方法应用于合成孔径雷达成像仿真,仿真结果验证了方法的有效性。 相似文献
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介绍了S.R.1《在全球技术法规中使用的统一定义和规程的特别决议》的起草过程,S.R.1规定的车辆一般定义、分类、质量和外形尺寸;对比分析了我国国家标准与S.R.1的主要差异。 相似文献
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