Difference between revisions of "Eyesis4Pi data structure"
From ElphelWiki
| Line 6: | Line 6: | ||
! scope="col" width="270" | Stored on | ! scope="col" width="270" | Stored on | ||
! scope="col" width="100" | Comments | ! scope="col" width="100" | Comments | ||
| − | |- | + | |- valign="top" |
| Images | | Images | ||
| Host PC or (9x) internal SSDs (if equipped) | | Host PC or (9x) internal SSDs (if equipped) | ||
| | | | ||
| − | |- | + | |- valign="top" |
| IMU/GPS logs | | IMU/GPS logs | ||
| Internal Compact Flash cards (2x16GB) | | Internal Compact Flash cards (2x16GB) | ||
| Line 47: | Line 47: | ||
==Images== | ==Images== | ||
| − | The pictures from each image sensor are stored in triplets in the [[JP4|RAW JP4]] format. | + | ===Description=== |
| + | The pictures from each image sensor are stored in 8 triplets (because 3 sensors are connected to a single system board for the 24-sensor equipped camera) in the [[JP4|RAW JP4]] format. | ||
| + | {| | ||
| + | |- valign="top" | ||
| + | |[[File:Eyesis jp4.jpeg|thumb|200px|JP4 file opened as JPEG - sample from the master camera.<br/>Download [http://community.elphel.com/files/eyesis4pi/images_samples/eyesis4pi_jp4_sample.jp4 original JP4]<br/>Open in an [http://regex.info/exif.cgi?imgurl=http%3A%2F%2Fcommunity.elphel.com%2Ffiles%2Feyesis4pi%2Fimages_samples%2Feyesis4pi_jp4_sample.jp4 online EXIF reader]]] | ||
| + | |[[File:Eyesis jpeg.jpeg|thumb|200px|JP4 converted to JPEG - sample from the master camera]] | ||
| + | |[[File:Eyesis vertical segment.jpeg|thumb|120px|Each triplet is a vertical segment]] | ||
| + | |[[File:Eyesis_image_set.jpeg|thumb|500px|Eyesis4Pi images set]] | ||
| + | |} | ||
| + | Each triplet when post-processed in ImageJ plugin, cut and re-oriented is a vertical segment of a panorama. | ||
| + | ===Images=== | ||
===Links=== | ===Links=== | ||
* [[JP4|JP4 format]] | * [[JP4|JP4 format]] | ||
* [[JP4_Compatible_Software| JP4 compatible software]] | * [[JP4_Compatible_Software| JP4 compatible software]] | ||
Revision as of 12:13, 27 April 2012
Contents
Intro
Eyesis4Pi stores images and gps/imu logs independently.
| Data | Stored on | Comments |
|---|---|---|
| Images | Host PC or (9x) internal SSDs (if equipped) | |
| IMU/GPS logs | Internal Compact Flash cards (2x16GB) |
IMU/GPS logs
Description
A sensor's log is a list of registered events from various sources:
- Trigger for starting image exposure (fps)
- IMU sentence received (2460 samples per second)
- GPS sentence received (5 samples per second) - in NMEA or other configured format.
Logs are stored in a binary format to have smaller size. Also, there's a file size limit - when it's reached a new file with an auto-incremented index will be started.
Raw logs examples
All the raw *.log files are found here
Parsed log example
parsed_log_example.txt (41.3MB) at the same location
[localTimeStamp,usec]: IMU: [gyroX] [gyroY] [gyroZ] [angleX] [angleY] [angleZ] [accelX] [accelY] [accelZ] [veloX] [veloY] [veloZ] [temperature] [localTimeStamp,usec]: GPS: $GPRMC,231112.8,A,4043.36963,N,11155.90617,W,000.00,089.0,250811,013.2,E [localTimeStamp,usec]: SRC: [masterTimeStamp,usec]=>1314335482848366 [localTimeStamp,usec]=>1314335474855775
Tools for parsing logs
Download one of the raw logs.
- PHP: Download read_imu_log.php_txt, rename it to *.php and run on a PC with PHP installed.
- Java: Download IMUDataProcessing project for Eclipse.
Images
Description
The pictures from each image sensor are stored in 8 triplets (because 3 sensors are connected to a single system board for the 24-sensor equipped camera) in the RAW JP4 format.
 JP4 file opened as JPEG - sample from the master camera. Download original JP4 Open in an online EXIF reader |
Each triplet when post-processed in ImageJ plugin, cut and re-oriented is a vertical segment of a panorama.
