Rohitdewani's profile - activity

So I have 100 pcd files. they look like this

VERSION .7 FIELDS x y z rgb SIZE 4 4 4 4 TYPE F F F U COUNT 1 1 1 1 WIDTH 38092 HEIGHT 1 VIEWPOINT 0 0 0 1 0 0 0 POINTS 38092 DATA ascii 224 0 681 2172952 229 0 662 2107159 ....

Now I want to publish these files one by one on a topic . How do I do that? I have gone through the pcl ros tutorials.They subscribe to a topic, do some processing inside the call back function and then they publish it on a topic.

What I want to do is just publish these pcd files on a topic

thanks

Hi,

I have a whole robotic system in which I have a camera mounted on a robotic arm. One more camera is mounted on the top of a frame from which I can see my whole robotic system.

How can I start two cameras from just one camera driver? I have been able to start the two cameras with two different drivers.One was uvc_camera and the other one was gscam.

Please let me know thanks a lot

Hi,

How do I achieve this transformation between chessboard and sensor? And then apply it to the rotating pots? Please explain in little detail. Thanks

Hi,

How do I achieve this transformation between chessboard and sensor? And then apply it to the rotating pots? Please explain in little detail. Thanks

Hi,

I have to make a 3D model of a rotating object. How do I filter the point cloud of the rgbdslam so that my Asus Xtion Pro Live can only see that rotating object.Nothing on the left of it ,nothing on the right of it and nothing behind it. If this filtering happens and when i rotate the object ,rgbdslam package will do the work of generating the 3D model of my object. I am an avid learner so if you can guide me or show me the right way I will be able to make some progress.

Thank you

That is a great idea.I cannot use the black cloth but May be I was thinking if I could make the changes in the RGBDSLAM source code it self to filter the images. Can you please tell me which file I should look into? Or may be if your could just guide me a little to write this node?

Hi,

Thank you for your inputs. I will take point clouds by rotating the table. Then after that I did not understand what you meant by saying "The transformation between the chessboard and the sensor can be obtained by camera calibration"

How do I do this camera calibration?

Hi,

Thank you for your inputs. I will take point clouds by rotating the table. Then after that I did not understand what you meant by saying "The transformation between the chessboard and the sensor can be obtained by camera calibration"

How do I do this camera calibration? I mean which package should I use or how should I start coding for camera calibration? Can you please explain a bit more?

Thanks Rohit

Hi,

I have installed and used RGBDSLAM to take a 3D point cloud of my room. I am using Ros groovy on Ubuntu 12.04 . I have an ASUS Xtion Pro live.

Now my question:-

In my project I will not be able to move my Asus .My Asus can direclty look at a pot. But I have to take a 3D point cloud of a rotating pot with a plant in it. I can rotate the pot a full 360 degrees. How do I achieve this using RGBDSLAM?

Rohit

Hello,

I needed some help regarding 3D modeling. I have the Asus Xtion Pro live .I have installed the Openni drivers on ros groovy on Ubuntu 12.04 and I can see the depth registered point cloud in rviz.

Here, we have a rotating circular table on which there are 5 pots. There will be a robotic arm near one of the pots to pluck the fruit from the pot.This pot has DC motor under it because of which it can rotate full 360 degrees. Because it can rotate a full 360 I will be able to create a 3D model of the current state of the plant.

How do I create a 3D model of the pot (in which there is a plant with fruits for example:-strawberry) and then feed it to moveit! or rviz . Perform motion planning and simulations on the plant and the robotic arm for collision avoidance and the end result goal should be that the arm is near fruit.

I also have a webcam mounted on top of the robotic arm.

I have tried installing object recognition kitchen and is not installing. I have tried various other packages like ethzasl_icp_mapper but I am not sure how to use it for a rotating pot. Which package should I use and how do I use that package? I am trying all the packages that are available since 15 days and I am not being able to go further that is why I am sending such a long email. Please let me know how I should go ahead with this.

P.S:- I also have a hokuyo Laser Range Finder which I could use.