Questions tagged [compressedimage]

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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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decompress jpeg depth data

OS: Ubuntu 16.04 LTS ROS distro: kinetic Hey, I am using an old Microsoft Kienct camera and freenect for publishing the data. Subscribing to the topic "/camera/depth_registered/image_raw/...
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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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Size of a CompressedImage

I have a compressed image in a bagfile. I am subscribed to the topic with : ...
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sensor_msgs::CompressedImage subscribe fails to build

Hey I have the following subscriber: ...
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Python - Compressed Image, Publisher/Subscriber

I have implemented the code provided in: http://wiki.ros.org/rospy_tutorials/Tutorials/WritingImagePublisherSubscriber however the published topic is empty. It does not contain any information. I ...
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Converting a bag with uncompressed Images to CompressedImages

I have an offline program that will bag.write sensor_msgs/Image and would rather compress them into a smaller format (e.g. JPEG) for easier streaming. Compressing the bags with bz2 or lz4 is ...
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Converting a Compressed Image to QImage

Hi all, I need to create a camera feed viewer that will need to run on very limited bandwidth networks. As such I want to use Compressed images instead of the raw image. My application is python and ...
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Is there any point in using image_transport republish instead of using CompressedImage in Python?

I have a Python ROS node that subscribes to a topic of message type CompressedImage. So far it works fine (I play a rosbag with compressed images, run my node, and it correctly reads them [I checked ...
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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 do I convert an ROS image into a numpy array?

Hi All, I'm trying to read ROS images published from a video camera (from MORSE) into a numpy array in my python script, but I don't know what is the correct way to do this, and everything I have ...
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sensor_msgs/CompressedImage decompression

Hi all! I cannot use this type of data: sensor_msgs/CompressedImage. I've trasformed the originale image stream with the "image_transport" package, to send image over internet. Now i need to ...
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