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Questions tagged [compressed-image-transport]

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How to deactivate image_transport plugins in ros2?

I am currently working with the image_transport package for publishing image topics. Among the available plugins, the latest image_transport_plugins package includes three formats: image_transport/...
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Trouble with creating an image_transport nodelet

I'm working in ROS noetic on ubuntu 20.04 I'm pretty new to the concepts of nodelets but I felt I needed them to more efficiently go through a process of taking uncompressed images and then ...
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Read h264 compressed images with rosbag API

Below is an example of how to use the ROSBag API to extract image data from a ROSBag file, and then visualize that data using OpenCV. ...
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How to decompress compressed image topic?

Hello people, I have a question on how to decompress image topics. I have a /D435/color/image_raw/compressed image and I am interested in decompressing it and get a ...
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Callback CompressedImage /w image_transport

Hello, I am trying to get the images of a kinect topic via image_transport. I added a Subscriber like this ...
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mono16 image is wrongly formed when using compressed image_transport

I am dealing with a 16-bit mono image, publishing it using image_transport. I have no issues with the raw data topic, I can view it directly, bag it, replay it, and view again. If I run ...
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Republishing CompressedDepth image to Raw image

I am using the following command to republish compressed depth images to raw message topics: ...
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Unable to load plugin for transport 'image_transport/compressed_sub'

I am using Kinect on Ubuntu 16.04. After executing rosrun image_view extract_images image_transport/compressed_sub I get ...
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Unable to locate package ros-kinetic-image-transport

I have been trying to get this to work for multiple weeks now. Very frustrated. I have a pi 3 running Jessie. Ran all the steps in http://wiki.ros.org/ROSberryPi/Installing%20ROS%20Kinetic%20on%20the%...
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How to deactivate image_transport plugins?

Hi I would like to deactivate image_transport plugins from a launch file. My robot has many cameras and I am not using the compressed images. It would save CPU time if I can do that. I would prefer a ...
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How to convert CompressedImage to Image?

I would like to convert CompressedImage to Image. rosrun image_transport republish raw in:=/image_raw compressed out:=/image_raw_converted Then, I could got ...
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image_transport rosbag issue

Has anyone else seen problems recording rosbags for all topics of a node using image_transport? ERROR [/tmp/buildd/ros-indigo-compressed-depth-image-transport-1.9.2-0trusty-20150729-0539/src/...
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image_transport republish One Time Use

Folks, I have several rosbags, 8 seconds long each, which only contain compressed depth images. Since rospy does not support compressedDepth (as far as I know) I am using ...
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Decode compressedDepth message from compressed_depth_image_transport

Hi, I am using the compressed_depth_image_transport to compress a Kinect depth image before letting it go through rosbridge (the ...
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How To Write C++ CompressedImage Subscriber?

Folks, I can't find explicit tutorials on how to WRITE a subscriber for compressed images on roscpp. I see the one in python, as well as the image_transport tutorials, etc., but nothing concrete about ...
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video_recorder compressed image

Hi all, I am trying to get a video from a compressed Image. I saved the data from the camera in a rosbag file called _2016-09-13-02-10-12.bag. If I do : ...
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Publishing compressed images directly for 120fps streaming

Hi, I have a usb camera able to out mjpeg up to 120fps. I would like to send this video stream over a wifi network to a remote node. So far using image_raw/compressed topic re-encode video stream and ...
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sensor_msgs::CompressedImage subscribe fails to build

Hey I have the following subscriber: ...
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compressed_image_transport segmentation fault

On Ubuntu, I wrote a simple subscriber and display with cv::imshow. It works with raw image, but if I set the image_transport param to "compressed" it immediately gives segmentation fault. I ...
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Compressed camera images from rosbag to matlab

I have a bag file containing lots of sensor messages, including compressed camera images. I would like to use this stream of camera images in MATLAB. I know of two possible approaches: either by ...
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How to subscribe visp_auto_tracker to /usb_cam/image_raw/compressed?

Hi all, I am wondering if this is possible, since just subscribing to /usb_cam/image_raw causes a lot of lag, and the visp_auto_tracker debug display window will freeze up. Here is my launch file to ...
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Trouble with compressed image transport and ardrone_autonomy

I recorded some .bag files from a few runs with the ardrone_autonomy node. I was recording the compressed image topic, and I can successfully play it back using image_view. However, I tried putting ...
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Publishing compressed images

Hi all, I have a camera that is giving me JPEG images. The compressed_image_transport overview says: "When writing a driver for such a camera, a quick and dirty approach is to simply copy the ...
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Is there a nice way to convert the built-in JPEG compressed image message to an AWT BufferedImage?

Like it says on the tin, we need to process a compressed_image transport from Java code. We aren't developing on Android and so can't leverage any of the Android-specific stuff packaged in to rosjava. ...
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difference between compressed_image and compressed_depth_image

Hi there, I am wondering what's difference between compressed_image and compressed_depth_image? If I want to compress raw image as much as possible for high resolution wireless video streaming, which ...
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Convert from a sensor_msgs::CompressedImage message to IplImage

I'm saving test videos in a JPEG compressed bag file. Then I try to use it as input to a subscriber that listens to the "/camera/image/compressed" topic and convert it to OpenCV's IplImage ...
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Is there a way to compress an Image?

I've got a kinect mounted on my robot, and i can view it's camera feed remotely by adding a "Image" to my rviz setup. however, it's really laggy. is there a way to compress the Image stream ...
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