鉴于远红外成像技术具有全天候场景监测的特点,提出一种面向夜间场景的车载远红外行人检测方法。根据远红外成像特性,通过全局图像阈值化处理滤除大量干扰背景区域,结合局部阈值化处理和图像区域合并策略提取候选行人目标区域RoIs(Regio...鉴于远红外成像技术具有全天候场景监测的特点,提出一种面向夜间场景的车载远红外行人检测方法。根据远红外成像特性,通过全局图像阈值化处理滤除大量干扰背景区域,结合局部阈值化处理和图像区域合并策略提取候选行人目标区域RoIs(Regions of Interest);提取RoIs的聚合通道特征表达远红外行人的局部形状特性,并采用集成学习算法AdaBoost判断RoIs的类别归属;在连续多帧图像序列中通过尺度自适应跟踪算法对行人识别结果进行综合决策,滤除单帧图像行人识别结果中的误检目标,提高行人检测结果的鲁棒性。实验结果表明,提出的行人检测方法在3段远红外视频(共包含3153幅测试图像)上的漏检率和误检率分别达到11.63%和3.34%,比常规行人识别方法具有较好的性能。展开更多
Wheat yellow dwarf(WYD) mused by the infection of barley yellow dwarf virus (BYDV) is the main disease of wheat. The yield loss caused by WYD has been estimated at 20％--30％。Three biosystems are associated with WYD:...Wheat yellow dwarf(WYD) mused by the infection of barley yellow dwarf virus (BYDV) is the main disease of wheat. The yield loss caused by WYD has been estimated at 20％--30％。Three biosystems are associated with WYD: BYDV, vireos-transmitting aphid and wheat host. The creation of BYDV-resistant wheat lines is argued as the most efficient way to control WYD.Though some wheat lines have been reported to show toler-ance, there are few, if any, effective sources resisting to BYDV. In contrast, apparent re-sistances to BYDV have been described in many species of grass, such as Thinopyrum intermedium. Now, the BYDV-resistant genes of Thinopyrum interrnedium have been success-fully transferred to wheat through wide-cross. Using field-investigation to identify展开更多
文摘鉴于远红外成像技术具有全天候场景监测的特点,提出一种面向夜间场景的车载远红外行人检测方法。根据远红外成像特性,通过全局图像阈值化处理滤除大量干扰背景区域,结合局部阈值化处理和图像区域合并策略提取候选行人目标区域RoIs(Regions of Interest);提取RoIs的聚合通道特征表达远红外行人的局部形状特性,并采用集成学习算法AdaBoost判断RoIs的类别归属;在连续多帧图像序列中通过尺度自适应跟踪算法对行人识别结果进行综合决策,滤除单帧图像行人识别结果中的误检目标,提高行人检测结果的鲁棒性。实验结果表明,提出的行人检测方法在3段远红外视频(共包含3153幅测试图像)上的漏检率和误检率分别达到11.63%和3.34%,比常规行人识别方法具有较好的性能。
文摘Wheat yellow dwarf(WYD) mused by the infection of barley yellow dwarf virus (BYDV) is the main disease of wheat. The yield loss caused by WYD has been estimated at 20％--30％。Three biosystems are associated with WYD: BYDV, vireos-transmitting aphid and wheat host. The creation of BYDV-resistant wheat lines is argued as the most efficient way to control WYD.Though some wheat lines have been reported to show toler-ance, there are few, if any, effective sources resisting to BYDV. In contrast, apparent re-sistances to BYDV have been described in many species of grass, such as Thinopyrum intermedium. Now, the BYDV-resistant genes of Thinopyrum interrnedium have been success-fully transferred to wheat through wide-cross. Using field-investigation to identify
