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In the field of 3D model matching and retrieval, an effective method for feature extraction is spherical harmonic or its mutations,
and is acted on the spherical images. But the obtainment of spherical images from 3D models is very time-consuming, which
greatly restrains the responding speed of such systems. In this paper, we propose a quantitative evaluation of the whole process
and give a detailed two-sided analysis based on the comparative size between pixels and voxels. The experiments show that
the resultant optimized parameters are fit for the practical application and exhibit a satisfactory performance. 相似文献
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铁路物流业经过多年发展,已经成为铁路辅业系统重要的支柱,铁路物流企业对辅业系统发展起着举足轻重的作用,但是由于诸多原因,铁路物流企业发展仍然存在一些问题.通过对铁路物流企业发展中存在问题的分析,就如何促进铁路物流企业发展从思想观念转变、基础设施建设、人才培养等方面提出了对策和建议 相似文献
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A novel algorithm to voxelize 3D mesh models with gray levels is presented in this paper. The key innovation of our method
is to decide the gray level of a voxel according to the total area of all surfaces contained by it. During the preprocessing
stage, a set of voxels in the extended bounding box of each triangle is established. Then we travel each triangle and compute
the areas between it and its set of voxels one by one. Finally, each voxel is arranged a discrete gray level from 0 to 255.
Experiments show that our algorithm gets a comparatively perfect result compared with the prevenient ones and approaches the
original models in a more accurate way. 相似文献
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随着国民生活水平的提高,公路交通量不断提升、载重车辆不断增加,给公路养护增加了很大的负担,公路行业也由此步入了“建养”并重的阶段。传统的养护模式无法完全适应当代的公路交通需求,需要探索更加科学、先进的养护技术。基于此,对无人机在公路养护中的应用进行研究。首先,以宁夏固原片区为例分析公路养护特点及难点;其次,分析无人机在公路养护中的应用价值;最后,对无人机在高速公路养护中的具体应用进行研究,以期为公路养护工作提供新思路,有效提高资源利用率、节约养护成本、提高日常养护工作效率。 相似文献