CMakeLists.txt and package.xml files of ros image to cv image conversion

asked 2016-08-10 12:17:30 -0600

skr_robo gravatar image

I have successfully built a node that can convert ros images to cv images based on tutorial given here. I had the following lines in my CMakeLists.txt :

find_package(OpenCV REQUIRED)



and the following in the package.xml :


The link given above says that opencv2 is to be added in package.xml. Out of curiosity, I removed all the above lines with the word OpenCV in both CMakeLists.txt and package.xml. I ran the catkin_make to compile my node again. It ran successfully and the node works fine too. I think it shouldn't. How is it able to know that the package requires opencv?

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are you sure you rebuild the package? please remove the build/devel/install directories to make extra sure and compile again.

Dimitri Schachmann gravatar image Dimitri Schachmann  ( 2016-08-11 08:48:08 -0600 )edit

Yes, earlier, I had removed the folder roscv_conv (that's the name I gave for the package) in the build directory and tried it. But it worked. Now that you mentioned devel, I removed every folder that said roscv_conv except the one in src. I did catkin_make. It worked.

skr_robo gravatar image skr_robo  ( 2016-08-12 11:54:37 -0600 )edit

I am running this on ros Indigo in ubuntu 14.04 on a Jetson TX1.

skr_robo gravatar image skr_robo  ( 2016-08-12 12:00:58 -0600 )edit

I haven't removed image_transport and cv_bridge dependencies. Could this be because of that?

skr_robo gravatar image skr_robo  ( 2016-08-12 12:04:54 -0600 )edit
  1. I would recommend to remove the enitre build and devel directories and build everything from scratch. 2. You are using c++, right?
Dimitri Schachmann gravatar image Dimitri Schachmann  ( 2016-08-15 03:51:58 -0600 )edit

Yes, I am using c++. I will try this.

skr_robo gravatar image skr_robo  ( 2016-08-18 17:07:43 -0600 )edit