[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$ffWpxor-ttuwJ-9KZpvd0u2yrxMEZ9ErZVBgRG7UYUVU":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2025-12-09 15:04:28",257185979,[8,9,10,11],"计算量过大","无法检测斜边缘","无平滑机制,抗噪差","只能输出亚像素边缘",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},20,"53e1d2ef4961cca8eea3e23969ad2cb9","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F03a579384a6dc297c89809b582fcc767.png","默认课程","work_48695663","第四次作业","Roberts算子对边缘定位较准,但其主要缺点是",[21,32,41,50,59,68,77,80,89,98],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],257185973,[25,26,27,28],"提高运算速度","最大限度抑制噪声","使背景与目标错分概率最小","减少区域数量","阈值分割中,若图像直方图呈现&quot;双峰一谷&quot;,选择谷底作为阈值的主要目的是","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],257185974,[36,37,38,39],"threshold","auto_threshold","dyn_threshold","watersheds","在Halcon中,可自动寻找直方图谷底并完成多阈值分割的算子是",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],257185975,[45,46,47,48],"只需全局单一阈值","必须先对原图进行平滑,再比较局部灰度差","适用于光照均匀的图像","不能提取比背景亮的目标","关于dyn_threshold(动态阈值)的描述,正确的是",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],257185976,[54,55,56,57],"边缘梯度幅值","种子像素\u002F区域","分水岭线","直方图峰值","区域生长法分割的关键起始条件是",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":30,"type":31},[],257185977,[63,64,65,66],"区域最大面积","邻域与种子灰度差允许上限","平滑尺度","分割后的区域数量","在regiongrowing算子中,参数Tolerance的物理含义是",{"answer":69,"createTime":5,"id":70,"options":71,"question":76,"source":30,"type":31},[],257185978,[72,73,74,75],"区域面积&gt;MaxSize","区域灰度方差&gt;阈值","区域边缘长度&gt;阈值","区域中心距&gt;阈值","四叉树分裂-合并算法中,分裂操作的依据是",{"answer":78,"createTime":5,"id":6,"options":79,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":81,"createTime":5,"id":82,"options":83,"question":88,"source":30,"type":31},[],257185980,[84,85,86,87],"梯度最大点","二阶导数由正变负或由负变正点","灰度绝对值最大点","直方图谷底点","在LoG边缘检测中,零交叉点对应",{"answer":90,"createTime":5,"id":91,"options":92,"question":97,"source":30,"type":31},[],257185981,[93,94,95,96],"直角坐标 (x,y)","极坐标 (&rho;,&theta;)","齐次坐标 (u,v,w)","四叉树坐标","Hough变换检测直线时,从图像空间映射到参数空间,所采用的坐标表示是",{"answer":99,"createTime":5,"id":100,"options":101,"question":106,"source":30,"type":31},[],257185982,[102,103,104,105],"直方图均衡","高斯平滑+颜色反转","线性灰度拉伸","Roberts锐化","分水岭算法中,为了避免过度分割,常采用的预处理措施是"]