Posts made by JackHulspas

Hello everyone!

I have a simple question, how can you acces the point cloud of the camera? Or is points_3d the point cloud?

I have been experimenting with both the Tau Lidar camera and an external library called open3d, which is used to visualize point clouds. I tried to use points_3d to visualize the point cloud by converting it into a .ply file, but noticed the point cloud wasn't as accurate as i had hoped it to be.

Here are some examples as to what I mean:

https://imgur.com/a/5yfgAZp
A screenshot from what the camera sees (wooden block):

A screenshot from what the point cloud sees (wooden block):

A screenshot from what the camera sees (stairs):

A screenshot from what the point cloud sees (stairs):

This is something similiar to what I expect/desire, an accurate point cloud based of what the camera sees:

What is the correct way of getting the point cloud from the camera? Or is the points_3d list indeed the point cloud, but is it not getting an accurate result due to, for example, an incorrect integration time?

Thanks in advance for any help! I would love to hear what I am doing wrong or how I could get my wanted result. I would even be grateful for an explenation of how to actually get the point cloud. Thanks!

@Lazar-Demin Thank you for replying!

I shall see if i can use the data_depth method to do what I need.

But wouldn't the points_3D be more useful? Since I am trying to find two points on the screen to measure the distance. The 2 points most likely won't be on the same axis, so in order to get the distance between points wouldn't it be better to use the points_3D fuction, as it returns 3D coordinates in meters? Because as as far as I can tell the data_depth method returns how far the point is away from the camera (correct me if I'm wrong).

I shall also let you know if I make any progress using data_depth to get the distance, thanks!

Hello everyone!

I have a question about points_3d.

In the documentation it says:
3D points: list of unorganized 3D points. [X, Y, Z, R, G, B] XYZ: 3D coordinates in sensor coordinates reference system, unit is meter. RGB: pseudo RGB color values in a distance range based on smallest and largest Z values set by Camera.setRange(Z1, Z2).

However I'm trying to find a way to get a specific point in a specific location on the screen.

Is there a way to get the array to be more organized, or atleast a way to find out where the specific point is?

The reason I want to know where on the screen a specific point is, is because I am trying to find the distance between points. For that I need to know which point in the array corresponds with a specific location on the screen.

If anyone is able to help with this problem or atleast point me in the right direction, that would be appreciated!

Thanks in advance.

@crispyoz,

thanks for replying.

I have connected the Tau Lidar camera to my computer and it does work if it isn't connected to the Omega2+. I'll try to see if it works with a powered USB hub. I'll also wait on Lazar-Demin's response. Thanks in advance.

Hello everyone!

I am currently trying to connect my Tau Lidar camera to the Omegle2+, I wasn't sure whether to ask this
question under the Omega category or under the Tau camera category, but I decided to post it here, since I believe the issue has something to do with the Omega rather than the camera itself.

I currently have an Omega2+ powered by a 3.7V lipo battery, it is connected to my wifi network and there are no issues this far.

The issue comes once I try to connect my Tau Lidar camera to the onion, as soon as I plug it into the Omega2+, the Omega2+ turns off and it won't allow me to connect to it via my computer anymore.

My guess is that there isn't enough power coming to the Omega2+, but it also doesn't work if I have the Omega2+ powered by my computer using a USB-cable.

If I need to add seperate power to the camera, how would I do that as I see no input/output where I can connect a battery.

Or perhaps am I forgetting a component that I need before I can connect the Tau Lidar camera to the Omega?

Does anybody have an idea what I'm doing wrong and how I might be able to get it working?
I am new to using an Omega, so feel free to criticize me if I am doing something wrong or if I have missed something.

Any help would be appreciated, so thanks in advance!