Image format error when reading ROS compressed images
9 visualizzazioni (ultimi 30 giorni)
Mostra commenti meno recenti
Asanka Perera
il 11 Mag 2019
Commentato: Francesco Ciriello
il 2 Mar 2020
Hi,
I am trying to read ROS compressed images from Matlab using the following commands. I use a real Turtlebot3 robot.
imgSub = rossubscriber('/raspicam_node/image/compressed');
imgMsg = receive(imgSub);
rgbImg = readImage(imgMsg);
The last line gives this error:
Error using robotics.ros.msg.sensor_msgs.CompressedImage/readImage (line 64)
Could not find a semicolon in format character vector jpg. Modify the "format" property of the message object appropriately.
I found that manually changing the ROS message format solves the problem (change from jpg to bgr8; jpeg compressed bgr8).
imgSub = rossubscriber('/raspicam_node/image/compressed');
imgMsg = receive(imgSub);
imgMsg.Format = 'bgr8; jpeg compressed bgr8';
rgbImg = readImage(imgMsg);
Can someone explain why this happens and if it is possible to solve this without hardcoding the format.
Thanks.
1 Commento
Francesco Ciriello
il 2 Mar 2020
Have you tried using the '/raspicam_node/image/compressed' and '/raspicam_node/image/' messages in the Simulink readImage block? I can't seem to get anything but error code 1, i.e. Incorrect image encoding. Check that the incoming message encoding matches the ImageEncoding parameter.
Risposta accettata
Cam Salzberger
il 13 Mag 2019
Hello Asanka,
Any messages published by the image_transport package should ensure that the Format field is in the form expected by MATLAB. Consider using the image_transport system on the TurtleBot3, if that is possible.
-Cam
Più risposte (0)
Vedere anche
Prodotti
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!