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https://github.com/swri-robotics/imagezero_transport
ROS image_transport implementation of a fast, lossless compression library for 24-bit color images
https://github.com/swri-robotics/imagezero_transport
Last synced: about 19 hours ago
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ROS image_transport implementation of a fast, lossless compression library for 24-bit color images
- Host: GitHub
- URL: https://github.com/swri-robotics/imagezero_transport
- Owner: swri-robotics
- License: bsd-3-clause
- Fork: true (cfeck/imagezero)
- Created: 2016-09-30T15:52:47.000Z (over 7 years ago)
- Default Branch: master
- Last Pushed: 2022-02-09T03:00:59.000Z (over 2 years ago)
- Last Synced: 2024-03-27T04:51:12.641Z (3 months ago)
- Language: C++
- Homepage:
- Size: 78.1 KB
- Stars: 36
- Watchers: 7
- Forks: 11
- Open Issues: 2
-
Metadata Files:
- Readme: README.md
- License: LICENSE
Lists
- awesome-ros-tools - imagezero_transport - fast, lossless compression algorithm for 24-bit color photographic images. It compresses more than 20 times faster than PNG and decompresses about twice as fast, which means it is suitable for lossless compression of real-time camera video feeds.  (Other / Sensors)
README
imagezero\_transport [](https://travis-ci.org/swri-robotics/imagezero\_transport)
====================
ImageZero is a fast, lossless compression algorithm for 24-bit color photographic
images developed by [Christopher Feck](mailto:[email protected]). This repository
repackages it as a catkin package, has a package that provides ROS integration,
and has a package that implements a ROS image\_transport plugin that uses it.
The compressed size for natural, photographic color images is comparable to PNG, usually
between 30% to 50% of the original size. It compresses more than 20 times faster than PNG
and decompresses about twice as fast, which means it is suitable for lossless compression
of real-time camera video feeds. Read the
[KDE Blog Post](https://kdepepo.wordpress.com/2012/01/30/fast-lossless-color-image-compression/)
about it for some more details.
Packages
--------
### imagezero
The [ImageZero](http://imagezero.maxiom.de/) image compression library, restructured
into a catkin package. ImageZero is a high-performance lossless compression algorithm
designed for natural photos.
### imagezero\_ros
A library that provides ROS integration for ImageZero. It contains methods for
using ImageZero to convert between `sensor_msgs/Image`s and `sensor_msgs/CompressedImage`s.
### imagezero\_image\_transport
A ROS [image\_transport](http://wiki.ros.org/image_transport) plugin that uses
ImageZero as its compression mechanism. It can be used like any other ROS
image\_transport by setting the `image_transport` param for your client node to `imagezero`.
Installation
------------
The ImageZero packages have been release for the ROS Indigo, Jade, Kinetic, and Lunar distributions. You can install any of the packages like so:
```
sudo apt-get install ros--
```
Building From Source
------------
These directions assume you have already set up a catkin workspace. See
[this tutorial](http://wiki.ros.org/catkin/Tutorials/create_a_workspace) on the ROS Wiki
for help setting up a catkin workspace.
### Checking out the source code (wstool)
If you're using wstool, add this repository to your wstool workspace:
wstool set imagezero --git https://github.com/swri-robotics/imagezero_transport.git
### Checking out the source code (git)
If you're not using wstool, you can check out the repositories with git:
git clone https://github.com/swri-robotics/imagezero_transport.git
### Installing dependencies and building
Install all of the dependencies using rosdep by running the following command from the root of your catkin workspace:
rosdep install --from-paths src --ignore-src
Build the workspace with catkin\_make:
catkin_make