On Tue, Dec 21, 2010 at 1:58 AM, Homer Manalo <homer.manalo@roboteknik.com> wrote:

Yes I can see it. I'm actually using this line:
rosrun image_view image_view image:=/gscam/image_raw

It's like there is no communication between the camera and the image_converter.

Here are some rostopic outputs:
Published topics:
* /gscam/camera_info [sensor_msgs/CameraInfo] 1 publisher
* /gscam/image_raw [sensor_msgs/Image] 1 publisher
* /rosout [roslib/Log] 3 publishers
* /rosout_agg [roslib/Log] 1 publisher
* /image_topic_2 [sensor_msgs/Image] 1 publisher

Subscribed topics:
* /image_topic [sensor_msgs/Image] 1 subscriber
* /gscam/image_raw [sensor_msgs/Image] 1 subscriber
* /rosout [roslib/Log] 1 subscriber
homermanalo@Macmini-Linux:~/ros/stacks/pkg_test0$ rostopic info /image_topic_2
Type: sensor_msgs/Image

Publishers:
* /image_converter (http://Macmini-Linux:36632/)

Subscribers: None

homermanalo@Macmini-Linux:~/ros/stacks/pkg_test0$ rostopic info /image_topic
Type: sensor_msgs/Image

Publishers: None

Subscribers:
* /image_converter (http://Macmini-Linux:36632/)

homermanalo@Macmini-Linux:~/ros/stacks/pkg_test0$ rostopic info /gscam/image_rawType: sensor_msgs/Image

Publishers:
* /gscam_publisher (http://Macmini-Linux:60675/)

Subscribers:
* /image_view_1292924423744539054 (http://Macmini-Linux:51945/)

thanks
On Tue, Dec 21, 2010 at 5:26 PM, Billy Okal <b.okal@jacobs-university.de> wrote:
Hi Manalo,

you can see the mages using image_view
image_view image:=<image topic> [image transport type]
More info here

http://www.ros.org/wiki/image_view

billy

On 21 December 2010 08:32, Homer Manalo <homer.manalo@roboteknik.com> wrote:

I want to start opencv with this tutorial but it doesn't work for me.

I created a new package then added the cpp file to the src folder then added this line: rosbuild_add_executable(pkg_test0_imgToCv src/pkg_test0_imgToCv.cpp) to the CMakeLists.txt file. I already added the dependencies to the manifest file. Then make.

When I run it nothing happens, I expect the highgui would appear. I can confirm that my camera(gscam) is streaming images. I can see that the topics listed are active but using echo on the image_topic and image_topic_2 prints out nothing. Using rxgraph, there are only the gstreamer_publisher node and image_converter node connected to rosout node. Did I miss something? How do I get this thing to work?

thanks

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--
Billy Okal
Jacobs University Bremen
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"Science without Religion is Lame and Religion without Science is Blind", Albert Einstein
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