how to get co-ordinate value in pixel

asked 2021-10-26 14:30:24 -0500

Anukriti gravatar image

Hi, using find_object_2d ROS package, the values printed are Q homography values, but what if I need the value of four corners of the bounding box in pixel? How can I get that?

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You could subscribe to raw image and with the coordinates then use opencv to get pixel info

osilva gravatar image osilva  ( 2021-10-26 14:44:09 -0500 )edit

@osilva, I am actually very new to ROS. I am subscribing to the camera place on top of my robot in rviz-gazebo. This is the program actually https://github.com/introlab/find-obje..., from where can I print the pizels?

Anukriti gravatar image Anukriti  ( 2021-10-27 11:42:42 -0500 )edit

cv_bridge::CvImage img; img = *imageDepthPtr;

osilva gravatar image osilva  ( 2021-10-27 15:18:22 -0500 )edit

So do a bit of research on how to use opencv but you already have the image. Just need to apply the operation to find pixels RGB components

osilva gravatar image osilva  ( 2021-10-27 15:19:54 -0500 )edit
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