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test version #1
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Hi! in order to add a loop closure module, you can refer to lego-loam. The test version still has some issues,which need to be fixed. |
可能是因子图构建存在问题,检查一下因子图构建过程中的噪声模型、先验因子、位姿之间的约束添加是否正确 |
感谢回复,之前用ndt加这个设置的后端跑通了,现在加到aloam里面跑同一个数据结果报错,最近将lio-sam中保存关键帧函数和回环检测线程也类比加到aloam的ceres优化之后,还是报一样的错误,用的都是同一个数据包,都是在匹配到回环帧后报上面的错误,这个应该怎么查,大佬有招吗?感谢 /priorfactor/ /odomfactor/ /loopclosure factor*/ |
别叫我大佬了,承受不起。你是添加玩回环约束后,进行优化出的问题吗?如果是的话,可以和ndt那个比较一下,回环处的当前帧和历史帧之间的相对变换 |
哈哈能者为师,之前用的ndt+loop+gtsam没问题,而且在闭合处有很大的相对位姿也能矫正,我当时设的搜索半径都到30m了,但是把这一套搬到aloam里面时,过程中还加了GPS约束,闭合处的相对位姿其实已经比较小了,但就是在匹配到回环那一下出上面的错,很是烦恼。都不知道为啥
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On 09/04/2020 23:05, Houzhan Zhang wrote:
别叫我大佬了,承受不起。你是添加玩回环约束后,进行优化出的问题吗?如果是的话,可以和ndt那个比较一下,回环处的当前帧和历史帧之间的相对变换
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能详细说下到哪一步出问题吗? |
其实我确实还没准确定位到错误,就现象而言,加入了gpsfactor后gtsam会隔段时间有优化输出执行correctpose,而在那个闭合的十字路口处icp匹配到了相似帧,进行发布了,也就是在订阅到发不出来的匹配后相似帧时gtsam报错,整个回环检测线程也终止了,但同样的回环检测放在之前的ndt后面就没问题。而且后来另外又把liosam的回环和优化换进来 还是同样的问题。🤷♂️ |
hello,i also want to add a loop closure module in aloam.just don’t know how to handle it,could you please open the test version?thank you very much.
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