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openmvs和colmap里面的密集匹配算法异同 #4

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tangeroo opened this issue Oct 1, 2020 · 1 comment
Open

openmvs和colmap里面的密集匹配算法异同 #4

tangeroo opened this issue Oct 1, 2020 · 1 comment

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@tangeroo
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tangeroo commented Oct 1, 2020

您好,
打扰了,又是从您的博客过来。不知您是否研究过这两个库里面的密集匹配算法,想请教一点问题。。最近我阅读了colmap密集匹配算法的文章,数学公式太多有些地方没怎么看明白,只知道colmap里面的方法view selection和depth estimation是通过EM迭代同时完成的,view selection考虑更为全面一些,等等。还想请教一下下面的问题:
(1)colmap里面的深度值是怎么传播的,如何理解里面的状态转移方程 ,能否对比openmvs里面的方法稍微讲解一下不同之处。
(2)colmap法线优化是生成了额外的超参然后计算谁是最优,相比openmvs里面使用的二分法,这种方法的优势和劣势是什么
(3)相比openmvs,colmap方法更为耗时,耗时主要是因为EM这个迭代过程需要反复进行吗?
国庆期间还发来问题,希望不会过分打扰到您。
谢谢~

@ethan-li-coding
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ethan-li-coding commented Oct 7, 2020 via email

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