Kailthen

Results 2 issues of Kailthen

Thanks for your UrbanLoco dataset. I'm projecting pointcloud to image, it seems strange: ![image](https://user-images.githubusercontent.com/46671312/169684219-6368d019-2587-46ca-8c54-29e1adc0b0a4.png) The data and code can be found here: [https://github.com/Kailthen/sensor-calibration/blob/master/urban_loco.ipynb](https://github.com/Kailthen/sensor-calibration/blob/master/urban_loco.ipynb) And I have tried another dataset UrbanNav-HK-Medium-Urban-1...

![image](https://user-images.githubusercontent.com/46671312/233356005-ab459c48-c45f-4164-bf2c-3752671d2741.png) some ground points are wrong classified