900731 Data Handling for Eye-in-the-Sea on MARS : Changing AVED processing parameters in the automated workflow This page last changed on Feb 24, 2009 by dcline. ## About the AVED parameters for the EITS experiment These instructions describe how to change the options in the automated workflow. How to change the processing parameters How to change the video mask ### How to change the processing parameters The AVED processing options for the EITS experiment are set in the user "erika's" crontab file on the EITS computer. These can be changed by editing the crontable in the cygwin environment. Any changes to processing options take effect immediately, and all subsequent processing jobs will use these changed options. There are many processing options, and all the AVED processing options can be found here. For the EITS experiment, the suggested options to change are the following:
Option | What changing this means
--- | ---
| Path to the mask image. Change this to change the mask used. Do not specify an absolute path to the file, but rather just a filename. Put this same file in the user "erika" ~/workflow directory and it will then be used in the workflow.
--mbari-save-non-interesting-events | Saves non interesting events in addition to interesting events. The result of setting this option is to save more events which can lead to more false detections. To reduce the number of events generated, simply remove this option.
--mbari-min-event-area=<int> | The minimum area an event must be to be candidate.
--mbari-max-event-area=<int> | The maximum area an event can be, to be candidate
--rescale-input=<width>x<height> | Rescale input frames to fixed dims. To reduce the size of the input frames processed set this option. Take care to keep the aspect ratio the same as the original frame. The effect of changing this option is to speed up processing. Important - this will change the size of the output frames generated. Any subsequent actions that use the AVED output frames, like generating the mpeg results of the output will also be reduced resulting in a rescaled mpeg clip.
3. ## Login into EITS using a Remote Desktop Connection, or equivalent. Use the user name: erika, and ask Erika for the password. Once logged in, click the cygwin icon (click to enlarge) In the cygwin window set the xemacs editor as your default editor and edit the crontab file with the following:
       $  export EDITOR='xemacs'
       $  crontab -e
This will open the xemacs editor with the contents of the crontab file. Change the options designated by the environment variable MBARIVISION_OPTIONS as this variable stores all the AVED processing options. (click to enlarge) After changes are made, save the changes and exit xemacs to implement the changes and you're done !! (click to enlarge) ### How to change the video mask If changes to the video mask are required, simply replace the videomask.jpg file in the ~/workflow directory with the one to use in the workflow. Attachments: EITSChangeAVEDOptions1.png (image/png) EITSChangeAVEDOptions2.png (image/png) EITSChangeAVEDOptions3.png (image/png)

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