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Ros By Example Chapter 10 - Robot vision
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| 硬件：Macbook Air | |
| 操作系统：Ubuntu 14.04 | |
| ROS： Indigo |
10.10.2 Viewing Skeletons in RViz
教材不完善：运行rosrun openni_tracker openni_tracker时提示“InitFromXml failed: Can't create any node of the requested type!”
花了几个小时google之，最终在Google group Ros By Example找到了答案：
需要安装一个教材中不曾提到的kinect-nite驱动。
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10.5 ROS to OpenCV: The cv_bridge Package
教材错误
这一节里面源代码有误，导致运行出错
cv_bridge_demo.py的image_callback方法里面的第一行：
frame = self.bridge.imgmsg_to_cv2(ros_image, "passthrough")应为
frame = self.bridge.imgmsg_to_cv2(ros_image, "bgr8")教程附带的完整代码里面用了前面那一行，
但是详细说明里面采用了后面这行。