stereo_image_proc : Assertion `left_.fx() == right_.fx()'

edit

I hope following helps in case of usb_cam driver: in the launch file for each node publishing left and right images respectively, set camera_frame_id same for each node (say "usb_cam"), e.g. create a launch file named usb_cam_stereo.launch :

<launch>
  <group ns="stereo">
    <node name="left" pkg="usb_cam" type="usb_cam_node" output="screen" >
        <param name="video_device" value="/dev/video1" />
        <param name="image_width" value="320" />
        <param name="image_height" value="240" />
        <param name="pixel_format" value="mjpeg" />
        <param name="camera_frame_id" value="usb_cam" />
        <param name="io_method" value="userptr"/>      
    </node>
    <node name="right" pkg="usb_cam" type="usb_cam_node" output="screen" >
        <param name="video_device" value="/dev/video2" />
        <param name="image_width" value="320" />
        <param name="image_height" value="240" />
        <param name="pixel_format" value="mjpeg" />
        <param name="camera_frame_id" value="usb_cam" />
        <param name="io_method" value="userptr"/>      
    </node>  
  </group>  
</launch>

and run following on terminal:

$roslaunch usb_cam_stereo.launch

ROS_NAMESPACE=stereo rosrun stereo_image_proc stereo_image_proc _approximate_sync:=True _queue_size:=4

Hello! I have the same error:

stereo_image_proc: /tmp/buildd/ros-electric-vision-opencv-1.6.13/debian/ros-electric-vision-opencv/opt/ros/electric/stacks/vision_opencv/image_geometry/src/stereo_camera_model.cpp:30: bool image_geometry::StereoCameraModel::fromCameraInfo(const sensor_msgs::CameraInfo&, const sensor_msgs::CameraInfo&): Assertion `left_.fy() == right_.fy()' failed. Aborted

Here is my node launch file:

<group ns="xb3_short"> <node name="stereo_image_proc" pkg="stereo_image_proc" type="stereo_image_proc" args="_approximate_sync:=True _prefilter_size:=255 _prefilter_cap:=63 _correlation_window_size:=31 _min_disparity:=0 _disparity_range:=32 _uniqueness_ratio:=10 _texture_threshold:=100a _speckle_size:=400 _speckle_range:=15 __name:=xb3_short_stereo_proc"/> </group>

I checked the timestamps for left and right camera info topics and they match. Any idea? Thanks.