— How to set up the iMotion annotator on your Mac

Red Hen is working with a computer science team at the University of Basel in Switzerland on a sketch-based visual search engine called iMotion. You can contribute to creating the training data for this project with the iMotion annotator, which is a simple java application that allows you to draw a rectangle on an image to indicate the location of an event or entity, such as a gesture or a person.

Related pages

Installation instructions

Here's the full 10-step recipe to get you going with the iMotion annotator. It assumes you have access to a mac or linux computer.
  1. Open Terminal and check that you have at least Java 7 -- if not, update your Java:

    java -version

  2. Create the directory ~/Documents/redhen/images with this command:

    mkdir -p ~/Documents/redhen/images

  3. Browse to http://vrnewsscape.ucla.edu/pdf/vrNewsScape/annotator.jar and download the file to ~/Documents/redhen

    This is our tagging utility, used to create bounding boxes on images. The syntax for this utility is:

                     java -jar annotator.jar <input folder> <output file>

  4. To test that this works, place some random images (png, jpg) in the ~/Documents/redhen/images folder.

    Back in Terminal, change directory to redhen, verify the program is there, and run the annotator:

                     cd ~/Documents/redhen
                     ls -l      (you should see annotator.jar)
                     java -jar annotator.jar images test.iMotion

    You should see the first image. Use your mouse to mark a bounding box (in red) on the image, and press the Spacebar. That should call up the next image.

  5. Browse to this page and install MacPorts: https://www.macports.org/install.php (linux users can skip this step).

    Select your version of OS X. Note that you also need XCode and the command-line developer tools, see the instructions.

    It's a bit complicated, but it works!

  6. MacPorts lets you install various open-source programs Red Hen routinely uses. Give these commands:

        sudo port selfupdate
        sudo port install ffmpeg-devel +gpl2 +gpl3 +nonfree

    When you type the sudo command, you'll be asked for a password -- that's the regular password you use to log into your own laptop.

    If that goes well (it will take a while), continue with

        sudo port install coreutils gsed bash findutils wget mp4v2 ossp-uuid dos2unix alpine moreutils autossh

    (Linux users instead install these packages: ffmpeg wget mp4v2-utils uuid dos2unix alpine moreutils autossh)

  7. Protect the machine from attacks

    The macports package fail2ban is useful for blocking attackers; see Configure fail2ban.

  8. Create a folder to hold the videos and download the first video (assuming you are a turnerstudent):

         mkdir ~/Documents/redhen/videos
         cd ~/Documents/redhen/videos
         rsync turnerstudents@164.67.183.179:/sweep/2015/2015-07/2015-07-03/2015-07-03_2300_US_WKYC_Channel_3_News_at_7.mp4 ./ -av

  9. Next, let's get the Red Hen script that extracts frames from the video at one-second intervals and place it in your local script folder:

         rsync turnerstudents@164.67.183.182:/usr/local/bin/extract-frames-ffmpeg.sh /tmp -av
         sudo mkdir -p /usr/local/bin
         sudo mv /tmp/extract-frames-ffmpeg.sh /usr/local/bin

  10. Verify you have the script in place

        which extract-frames-ffmpeg.sh

    If you get a response, you can cd to the folder where you have the mp4 file (if you're not there already) and issue the frame-extraction command:

         cd ~/Documents/redhen/videos
         extract-frames-ffmpeg.sh 2015-07-03_2300_US_WKYC_Channel_3_News_at_7.mp4

    This should extract frames at one-second intervals into a folder called 2015-07-03_2300_US_WKYC_Channel_3_News_at_7.hq

  11. If that works, move that folder into images and try the annotator tool on it; see if you can call up one image after the other by using the spacebar:

         mv 2015-07-03_2300_US_WKYC_Channel_3_News_at_7.hq ../images/
         cd ~/Documents/redhen/
         java -jar annotator.jar images/2015-07-03_2300_US_WKYC_Channel_3_News_at_7.hq 2015-07-03_2300_US_WKYC_Channel_3_News_at_7.iMotion
Congratulations! Let us know you have the iMotion annotator working!