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realsense d435i imu-camera calibration #2

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lishanggui opened this issue Aug 11, 2020 · 12 comments
Open

realsense d435i imu-camera calibration #2

lishanggui opened this issue Aug 11, 2020 · 12 comments

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@lishanggui
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您好!请问您是怎么标定realsense d435i imu-camera的?我用kalibr标定imu-camera,最后得到的图像重投影误差总是非常大?所以没法用realsense做实验?

@xiefei2929
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说实话,我也正标着呢

@xiefei2929
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您要是有啥技巧可以交流交流

@lishanggui
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您好! 请问您方便邮件交流吗? 我的邮箱是[email protected] realsense d435i 我尝试了各种方式都没能标定好

@lishanggui
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lishanggui commented Aug 13, 2020

我用了两种方式
1)对realsense原图进行标定,将标定结果写入设备。从设备中读取640x480 矫正后的infra双目图像的相机内参,并与imu进行标定;
2)对realsense 640x480矫正后的infra双目图像进行标定,得到的标定参数在和imu进行标定;
同时我在kalibr中尝试了不同的相机模型(pinhole-radtan、pinhole-equi)进行imu和双目标定后得到的图像重投影误差很大。如下图所示:
2020-08-13 11-44-41屏幕截图
而小觅s1030摄像头进行imu和相机标定得到的图像重投影就比较好。如下图所示:
2020-05-20 19-08-50屏幕截图

@dzqiu
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dzqiu commented Nov 29, 2020

请问一下ORBSLAM有考虑过相机和IMU时间戳偏移的问题吗?我发现realsense 435I的时间偏移挺影响VIO的性能的,目前好像还是VINS比较稳一点。

@zyl1234
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zyl1234 commented Dec 21, 2020

请问一下ORBSLAM有考虑过相机和IMU时间戳偏移的问题吗?我发现realsense 435I的时间偏移挺影响VIO的性能的,目前好像还是VINS比较稳一点。

你有尝试对imu进行时间补偿吗

@dzqiu
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dzqiu commented Dec 21, 2020

请问一下ORBSLAM有考虑过相机和IMU时间戳偏移的问题吗?我发现realsense 435I的时间偏移挺影响VIO的性能的,目前好像还是VINS比较稳一点。

你有尝试对imu进行时间补偿吗

请问一下,怎样对IMU进行时间补偿?是使用工具直接对rosbag修正,还是在算法预积分的时候补偿?

@zyl1234
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zyl1234 commented Dec 21, 2020 via email

@dzqiu
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dzqiu commented Dec 21, 2020

就是在imucall里加补偿时间 我自己刚刚试了下😂 效果都一般。还是会隔两三秒就刷新地图 发自我的iPhone

------------------ Original ------------------ From: Qiu Dezhuo <[email protected]> Date: Mon,Dec 21,2020 3:43 PM To: xiefei2929/ORB_SLAM3-RGBD-Inertial <[email protected]> Cc: zyl1234 <[email protected]>, Comment <[email protected]> Subject: Re: [xiefei2929/ORB_SLAM3-RGBD-Inertial] realsense d435i imu-camera calibration (#2) 请问一下ORBSLAM有考虑过相机和IMU时间戳偏移的问题吗?我发现realsense 435I的时间偏移挺影响VIO的性能的,目前好像还是VINS比较稳一点。 你有尝试对imu进行时间补偿吗 请问一下,怎样对IMU进行时间补偿?是否有特别的工具呢? — You are receiving this because you commented. Reply to this email directly, view it on GitHub, or unsubscribe.

嗯,我也试过VINS,关掉在线估计时间偏移,直接设置固定补偿时间td,效果也不太好。

@zyl1234
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zyl1234 commented Dec 21, 2020 via email

@xiefei2929
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timeshift的补偿,我加上了,录了个K4A的数据集,你们看看

@yonggaogit
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yonggaogit commented Nov 19, 2022

timeshift的补偿,我加上了,录了个K4A的数据集,你们看看

请问补偿直是怎么测算出来的

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5 participants