[ros-users] cv_bridge tutorial

[Homer Manalo]

I've got it working now by replacing the "image_topic" with
"/gscam/image_raw" in this line:

image_sub_ = it_.subscribe("/gscam/image_raw", 1,
&ImageConverter::imageCallback, this);

Still, I want to know how to make it work without this modification.

On Wed, Dec 29, 2010 at 11:56 AM, Homer Manalo
<homer.manalo at roboteknik.com>wrote:

> Is there a comprehensive guide on this? I am not sure what those "make
> sure" mean. Am I suppose to get a warning message for these? I've attached
> the rxgraph see if it helps.
>
>
> On Thu, Dec 23, 2010 at 8:28 AM, Tully Foote <tfoote at willowgarage.com>wrote:
>
>> Have you been through the network troubleshooting page?
>> http://www.ros.org/wiki/ROS/Troubleshooting#Network_Configuration
>>
>> Tully
>>
>>
>> On Tue, Dec 21, 2010 at 1:58 AM, Homer Manalo <
>> homer.manalo at 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 at 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 at Macmini-Linux:~/ros/stacks/pkg_test0$ rostopic info
>>> /image_topic
>>> Type: sensor_msgs/Image
>>>
>>> Publishers: None
>>>
>>> Subscribers:
>>>  * /image_converter (http://Macmini-Linux:36632/)
>>>
>>>
>>> homermanalo at 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 at 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 at roboteknik.com>wrote:
>>>>
>>>>> I want to start opencv with this tutorial<http://www.ros.org/wiki/cv_bridge/Tutorials/UsingCvBridgeToConvertBetweenROSImagesAndOpenCVImages>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
>>>>>
>>>>> _______________________________________________
>>>>> ros-users mailing list
>>>>> ros-users at code.ros.org
>>>>> https://code.ros.org/mailman/listinfo/ros-users
>>>>>
>>>>>
>>>>
>>>>
>>>> --
>>>> Billy Okal
>>>> Jacobs University Bremen
>>>>
>>>> ----------------------------------------------------------------------------------------------------------------------
>>>> "Science without Religion is Lame and Religion without Science is
>>>> Blind", Albert Einstein
>>>>
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>>>>
>>>>
>>>
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>>>
>>
>>
>> --
>> Tully Foote
>> Systems Engineer
>> Willow Garage, Inc.
>> tfoote at willowgarage.com
>> (650) 475-2827
>>
>> _______________________________________________
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>>
>>
>
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