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基于动态网格和分区域聚类的玉米苗带识别算法研究 被引量:5
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作者 张博立 吴蒙然 +3 位作者 温兴 查家翼 李延凯 杨洋 《中国农机化学报》 北大核心 2020年第7期191-196,共6页
针对基于计算机视觉的玉米苗带中心线提取受自然环境干扰严重的问题,提出基于6×6动态网格与分区域特征点聚类的玉米行定位算法。首先将获取的玉米苗带图像进行像素归一化,采用改进的过绿特征和最大类间方差法分割玉米苗带与土壤背... 针对基于计算机视觉的玉米苗带中心线提取受自然环境干扰严重的问题,提出基于6×6动态网格与分区域特征点聚类的玉米行定位算法。首先将获取的玉米苗带图像进行像素归一化,采用改进的过绿特征和最大类间方差法分割玉米苗带与土壤背景,得到二值图像;然后通过动态网格扫描二值图像,获取候选玉米苗带特征点,并对候选玉米苗带特征点采用分区域聚类算法,得到玉米苗带特征点;最后通过最小二乘法对特征点进行线性拟合得到玉米苗带中心识别线。田间试验表明,该算法具有较好的抗干扰性能,能够很好的适应较为复杂的田间环境。玉米苗带识别准确率为93.4%,处理一幅分辨率为1920像素×1024像素的图像平均耗时320 ms。 展开更多
关键词 玉米苗带对行 视觉导航 动态网格 区域特征点
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分区域聚类的蚁群算法 被引量:2
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作者 杨琼 《内江师范学院学报》 2013年第2期25-27,共3页
根据旅行商问题中城市分布的特点,提出了分区域聚类的蚁群算法.首先,对城市分布进行球形聚类,再分别对剩下的城市进行线形聚类和孤立点聚类.采用这样的分区域聚类的蚁群算法收敛速度快,寻求的解更优.实验表明,该算法比基本蚁群算法在求... 根据旅行商问题中城市分布的特点,提出了分区域聚类的蚁群算法.首先,对城市分布进行球形聚类,再分别对剩下的城市进行线形聚类和孤立点聚类.采用这样的分区域聚类的蚁群算法收敛速度快,寻求的解更优.实验表明,该算法比基本蚁群算法在求得解更优的同时,速度快3~13倍. 展开更多
关键词 旅行商问题 蚁群算法 分区域聚类
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Analysis on Regional Difference of Development of Elderly Care Real Estate in Gannan Area
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作者 Min CHEN Binbin CAO Zuoliang ZHU 《Agricultural Science & Technology》 CAS 2017年第10期1979-1983,1988,共6页
The continuous expansion of the scale of the elderly population and the continuous acceleration of elderly population ageing have had a profound impact on China's economy, society and family, especially for the devel... The continuous expansion of the scale of the elderly population and the continuous acceleration of elderly population ageing have had a profound impact on China's economy, society and family, especially for the development of China's pension indusby, in this paper, taking Ganzhou City as an example, the population size, population ageing rate, urbanization rate and residential area were analyzed using Z-Scores standardized data processing model from three aspects: the population development level, the real estate market maturity degree and the service development level. The proportion of the tertiary industry and other indicators were used to explore the suitability of the development of eldedy care real estate, and cluster analysis was used to classify the sample areas according to the suitability. The results show that the 18 counties and cities in Ganzhou City could be divided into three categories, areas with poor suitability, areas with development potential, key development areas. Finally, suggestions were put forward that the target market of the development of old-age real estate could be comprehensively analyzed by combining the population development trend of the region with its thoughts and concepts, social and economic development, the maturity of the real estate market and the development of the service industry to ensure the sustainable operation of the old-age real estate. 展开更多
关键词 Eldedy care real estate Regional differences Cluster analysis Z-Scores standardization
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