stereo camera crashing after synchronisation

[ghost]

I'm trying to use the ueye_cam package to launch a two independent ueye camera(UI122xLE-C) as stereo camera, Because i want to do stereo processing which needs identical time stamps for both the camera's. I have modified the master_slave launch file and executed with two camera's. One camera is failed to intialize and the error is like below:

ERROR] [1467313081.966489221]: Could not open UEye camera ID 2 (IS_CANT_OPEN_DEVICE) [ERROR] [1467313081.966554728]: Failed to initialize UEye camera 'slave'

I would like to launch the both camera's for stereo_image_processing. I'm using ros-indigo-ubuntu14.04 Any suggestion or ideas for this issue? Thanks in advance!

[anqixu]

As the error message suggests, the specified camera ID is wrong. To see what are the camera IDs for your devices, or set them to specific ID values, run 'ueyecameraconfig' from the terminal.

Also, to make master_slave.launch work, you will need to connect the flash output pin from the master camera to the trigger input pin to the slave camera. See comments here for more details.

In addition to the above, you'll also either need to logically negate the trigger signal (e.g. using an arduino device + code linked above), or change the code in ueye_cam so that the slave triggers on IS_SET_TRIGGER_LO_HI instead of IS_SET_TRIGGER_HI_LO.

[ghost]

Hello, Recently i have connected the two ueye camera (UI-1221LE-C) like mentioned above i.e from pin4 to pin 3 using a simple wire. Also i had changed the code from S_SET_TRIGGER_HI_LO to IS_SET_TRIGGER_LO_HI. but when i launch the _master_slavesrgb8.launch file it is crashing always! Below is the error message

[ERROR] [1507648554.977615481]: Could not enable falling-edge external trigger mode for [right] (IS_NO_SUCCESS)
[ERROR] [1507648554.977657027]: Shutting down driver nodelet for [right]

what could be solution to avoid the crashing?

[anqixu]

From your pasted error message: [ERROR] [1507648554.977615481]: Could not enable falling-edge external trigger mode for [right] (IS_NO_SUCCESS)

The text part comes from the code I wrote from ueye_cam, while the part in the parentheses IS_NO_SUCCESS comes from IDS drivers. Based on this message, I believe that your particular camera does not support external trigger settings.

To confirm this, use ueyedemo to connect to your camera, then go in its options, and try to toggle the external trigger settings, and see if that works.

Either way, since I don't have your camera, I cannot help you debug further on this matter. Please contact IDS for more information.