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: 2 months 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 8 years ago)
• Default Branch: master
• Last Pushed: 2022-02-09T03:00:59.000Z (almost 3 years ago)
• Last Synced: 2024-08-03T02:02:44.733Z (5 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

Awesome Lists containing this project

• 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 [![Travis CI Build Status](https://travis-ci.org/swri-robotics/imagezero_transport.svg?branch=master)](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