ros.usb_cam驱动的安装

来源：互联网发布：航海王启航淘宝礼包编辑：程序博客网时间：2024/04/29 00:12

下载usb_cam:
http://wiki.ros.org/usb_cam

cd ~/catkin_ws/

git clone git://github.com/bosch-ros-pkg/usb_cam.git
或将usb_cam 拷贝到 catkin_ws
3 在catkin_ws中编译:
$mkdir build
$cd build
$cmake ..
$make
4 将编译好的整个目录拷贝到 ros的share文件夹中运行。
5 运行
编写usb_cam.launch文件：

< launch>
<node name="usb_cam" pkg="usb_cam" type="usb_cam_node" output="screen" >
<param name="video_device" value="/dev/video0" />
<param name="image_width" value="640" />
<param name="image_height" value="480" />

<param name="framerate" value="30" />
<param name="pixel_format" value="mjpeg" />
<param name="camera_frame_id" value="usb_cam" />
<param name="io_method" value="mmap"/>
</node>
<node name="image_view" pkg="image_view" type="image_view" respawn="false" output="screen">
<remap from="image" to="/usb_cam/image_raw"/>
<param name="autosize" value="true" />
</node>
< /launch>
6 roslaunch usb_cam.launch
7 benchmark
当usb_cam_node已经运行的时候，打开一个新终端然后执行:
$rostopic hz --window=1000 /usb_cam/image_raw
8 launch文件中的"pixel_format"参数要根据摄像头种类设定，我就遇到了mjpeg类型和yuyv类型，若出现"Webcam: expected picture but didn't get it..."请考虑修改类型pixel_format参数

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