Eyesis4Pi workflow

Preface

The following page describes the Eyesis4Pi camera software and post-processing procedures.

Elphel-Eyesis4Pi GUI (recording)

Elpehl-Eyesis GUI (PHP+JavaScript+HTML) is installed on the laptop and used for controlling the Eyesis camera.

• elphel-eyesis-gui - camera GUI

Eyesis Output

• Each frame in a *.mov file is a combination of frames from 3 sensors glued vertically - triplet.
• The modules are numbered - 1..8 - having individual ip address:

192.168.0.221-228

• 192.168.0.221 - master camera, sends sync signals to others.
• The frames in *.movs are indexed.
• A single image format is JP4 (a raw format with a higher quality and frame rate than *.jpeg).
• Corresponding frames have the same time stamps generated by the master camera.
• The master camera frames are geotagged.
• The IMU log is stored on 1 of the 2 Compact Flash cards (non-removable) attached to the master camera.

Post Processing Software

Elphel Eyesis4Pi SDK software (pre-installed), for post-processing:

sudo apt-get install apache2 php5 ufraw dcraw libjpeg-progs imagemagick hugin

• Apache web server + php
• Movie2DNG - extracting JP4 (JP4 is the Elphel raw image format) images from *.MOVs.
• ImageJ (by 3rd party) - ImageJ with Elphel plugins (image quality enhancement, aberration correction, color balance, stitching) for processing JP4s to create TIFF/JPEG output;
• ImageMagick # (by 3rd party), also with a PHP scrip by Elphel is used for converting/modifying panorama JPEGs - scaling for WebGL panorama viewer/editor;

1. other pre-installed PHP scripts:

• • exif2kml.php - extract the GPS data from images and put it all to a KML file of the route.
  • create_links_xml_file.php - read the KML file and create file with records-links of the route points. It is used in Elphel WebGL Viewer

Other:

• Ufraw (by 3rd party) - to view/process DNG/TIFF
• Dcraw (by 3rd party) - for converting JPEGs
• cjpeg

Verify installation

In a terminal window type & enter commands ("command not found" == not installed):

movie2dng 
convert 
nona
enblend 
cjpeg --help
dcraw

Post processing workflow

• Copy all the *.mov files to certain locations (folders must have the r/w rights enabled for everyone):

Currently:
hdd1: /data/disk-1/<footage_name>/
...
hdd8: /data/disk-8/<footage_name>/

All the php scripts are launched from a single page:

• http://127.0.0.1/scripts/split_mov.php?dir=<footage_name> - (usage TBA) - it applies Movie2DNG to all the footage files. The output is JP4 files.
• http://127.0.0.1/scripts/exif2kml.php?dir=<footage_name> - it extracts the GPS data from images and puts it all to a KML file of the route. The output is a KML file.
• Launch ImageJ and process the files. The output are enhanced, stitched JPEGs (optionally TIFFs).
• http://127.0.0.1/scripts/convert_images_for_webgl.php?dir=<results_dir> - rescale results using ImageMagick.