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小
@李东武 问到知识盲区了，一般我们是用cvbridge做转换后发布。
李
@小鱼 是这样的 我一开始 定义一个sensor_msg:Image msg 然后直接memcpy(&msg.data[0],buf,size) 报段错误
后来发现data是vector类型，在定义msg的时候，data大小是0，也就是没有分配内存 所以会报段错误 用resize 方法分配一下内存就好了
