elphel committed changes to the Elphel project elphel353-8.0 CVS:
8.2.2 changes related to temperatures measurement and embedding in the Exif MakerNote

• Modified elphel_php.c rev1.7 - added 8 lines, removed 3 lines
• Modified Exif_template.xml rev1.6 - added one line, removed one line
• Modified imgsrv.c rev1.14 - added 8 lines, removed 3 lines

elphel committed changes to the Elphel project elphel353-8.0 CVS:
rev. 8.2.2 - added temperature measuring daemon, related parameters for logging SFE and system temperatures

• Modified src.list rev1.97 - added 5 lines, removed none
• Modified target.list rev1.88 - added 2 lines, removed one line
• Modified autocampars.php rev1.33 - added 25 lines, removed 6 lines
• Modified Makefile rev1.3 - added 8 lines, removed 5 lines
• Modified autoexposure.c rev1.8 - added 3 lines, removed one line
• Modified temperature.c rev1.1 - added none, removed none
• Modified temperature.h rev1.1 - added none, removed none
• Modified elphel_release rev1.85 - added one line, removed one line
• Modified c313a.h rev1.26 - added 12 lines, removed 2 lines
• Modified sync.sh rev1.4 - added 4 lines, removed none

elphel committed changes to the Elphel project elphel353-8.0 CVS:
added temperatures to MakerNote

• Modified sensor_common.c rev1.11 - added 7 lines, removed one line

elphel committed changes to the Elphel project elphel353-8.0 CVS:
bug fix in temperature measurement

• Modified i2c.php rev1.7 - added 4 lines, removed one line

elphel committed changes to the Elphel project elphel353-8.0 CVS:
8.2.1

• Modified target.list rev1.87 - added one line, removed one line

elphel committed changes to the Elphel project elphel353-8.0 CVS:
8.2.1 - GPS speed, x353.bit file tested on Eyesis

• Modified target.list rev1.86 - added one line, removed one line
• Modified autocampars.php rev1.32 - added 5 lines, removed 2 lines
• Modified start_gps_compass.php rev1.6 - added 7 lines, removed none
• Modified elphel_release rev1.84 - added one line, removed one line
• Modified x359.par rev1.29 - added 416 lines, removed 240 lines
• Modified x359_map.mrp rev1.28 - added 3185 lines, removed 271 lines
• Modified x353.bit rev1.19 - added 5 lines, removed 5 lines
• Modified x353.par rev1.19 - added 51 lines, removed 402 lines
• Modified x353.ucf rev1.13 - added 2 lines, removed one line
• Modified x353_map.mrp rev1.19 - added 5 lines, removed 272 lines
• Modified pgm_functions.c rev1.24 - added 4 lines, removed one line

1. Get X Virtual FrameBuffer
sudo apt-get install xvfb

2. Launch ImageJ (“cd” to the ij.jar directory):
Xvfb :15 &
DISPLAY=:15 java -Xmx12288m -jar ij.jar -run "TestIJ Plugin"

Comments:

• TestIJ Plugin is the name of the compiled plugin in the ImageJ menu. No need to specify a subfolder.
• :15 is an example.

Links that helped:

1. Source 1
2. Source 2
3. Source 3

Seeing the impressive images of the Elphel-Eyesis 4pi camera I thought it’s time to tell you about the HomeSide 720°. Like the Eyesis its purpose is to capture panorama frames with a framerate of 5fps. The major difference is that the HomeSide 720° is mounted on a helmet. To have an acceptable weight it consists of only two instead of eight Elphel 353 delivering one forth of the resolution the 4pi does. Thus the camera is able to record 30MPix frames before stitching. Additionally it’s reconfigureable to enable HDR panorama frames.

More interesting probably is the purpose it was built for. We created the assembly for indoor virtual tours. After several drawbacks we finally have an approach which works very well. We do auto leveling, auto stabilization and path extraction by image analysis only. Furthermore we recognize crossing points where the user can decide where to go when the tour is shown in the player.

This is not so easy since we neither have GPS nor IMU data. Nevertheless its possible.

All this information goes into our new webplayer which reassembles the images to a virtual tour.

Have a look at the HomeSide 720° Virtual Tour
Click into the player and use the cursor keys to navigate. You may also click and drag to change the point of view.  This tour was recorded with 10MPix i.e. one Elphel 353 with two sensors.

Important: The pi symbols shows a rendered tour, not recorded by the camera

At the moment we are improving the image quality. We are also looking for a partner to drive the development even faster to create stunning indoor virtual tours.

It has been a long while since my last blog entry in regards to river view panoramas. In the meantime the recording setup runs basically stable (putting aside minor problems with loose connectors) even under rough conditions (see also the gallery “Making Of” at the end of this post).

I just came back from artist-in-residency stays in Varanasi/Benares and Guwahati in India, that enabled me to have a few extensive recording sessions on various vessels like house boats, motor and rowing boats on Ganges River – for one the most sacred river to Hindus and probably most worshipped river on the planet, next to being one of the most polluted rivers of the world – and Brahmaputra River in Assam.

Many thanks go to Kriti Gallery in Varanasi and the Periferry project in Guwahati for hosting me and helping me to get onboard.

Web Player

Meanwhile I also just finished the “River View Web Player” as a public online Beta Version. It runs on openlayers and geodjango and features the growing archive and collection of river views (up to now including views of Ganges, Brahmaputra, Danube and Nile River). There are still plenty of things to polish up, some image material to be retouched and/or uploaded, but see yourself here:

River View Web Player

Using Elphel

I am using an Elphel 353 equipped with 8 or 16mm movie lenses from the seventies to acquire this imagery. The camera delivers a Window-of-Interest video stream of 2592 x 48 pixel size with a variable frame rate between 1 and 300fps (changed on the fly according to the speed of the vessel and distance to the object of focus. That is done manually and under visual control: similar to the auto-focus mechanism, it is also a question of choice and decision and therefore not easily automatable).
The video stream is then processed and saved by custom software.

I am not using Elphel’s internal linescan/photofinish for now, since it still behaves pretty unstable and unpredictable when changing parameters like TRIGGER, VIRT_KEEP and VIRT_HEIGHT on the fly. Also, having a line per frame allows me for a more fine-graded control and preview as long as enough frames are delivered.

Elphel’s internal linescan mode, however, works quite well and stable if it runs as fast as it goes or once you have fixed a setup – as some testing on Austrian Highways prove (find more here):

Elphel 353 in Linescan mode on Austrian Highway A1 - approx. 120km/h, 2000 lps

Sources

The source code of both, my recording software malisca and the web app and player, are open on my github repository.

Making Of / Gallery

A brief guided tour to Ganges and Brahmaputra river recordings in pictures:

On Ganges

Elphel on Ganges River

river recording setup: Thinkpad, Elphel 353, battery pack and USB-GPS-receiver

another shot of recording setup (including an improvised tent)

.. staring into the lens ..

.. obstacles (pontoon bridge) ..

lunch break on Ganges River

Elphel on Brahmaputra River

Not yet, but I would love this setup to be powered by solar energy ....

elphel committed changes to the Elphel project elphel353-8.0 CVS:
Increased drive to 4mA (from 2 mA), now the eye is nearly 180 degrees with 450mm cable

• Modified x359.bit rev1.33 - added 28 lines, removed 28 lines
• Modified x359.ucf rev1.13 - added 20 lines, removed 20 lines

elphel committed changes to the Elphel project elphel353-8.0 CVS:
8.2.0

• Modified target.list rev1.85 - added one line, removed one line

elphel committed changes to the Elphel project elphel353-8.0 CVS:
8.2.0

• Modified elphel_release rev1.83 - added one line, removed one line

elphel committed changes to the Elphel project elphel353-8.0 CVS:
added packages/initscripts/respawnd-R1_0_2/Makefile

• Modified src.list rev1.96 - added 4 lines, removed none

elphel committed changes to the Elphel project elphel353-8.0 CVS:
enabled respawnd in level4 (for telnetd)

• Modified Makefile rev1.1 - added none, removed none

elphel committed changes to the Elphel project elphel353-8.0 CVS:
Release 8.1.2.6

• Modified target.list rev1.84 - added 7 lines, removed 6 lines

elphel committed changes to the Elphel project elphel353-8.0 CVS:
release 8.1.2.6

• Modified src.list rev1.95 - added 9 lines, removed one line

elphel committed changes to the Elphel project elphel353-8.0 CVS:
8.1.2.6

• Modified elphel_release rev1.82 - added one line, removed one line

elphel committed changes to the Elphel project elphel353-8.0 CVS:
some cleanup

• Modified nfs_update rev1.18 - added 26 lines, removed 19 lines

elphel committed changes to the Elphel project elphel353-8.0 CVS:
keyword substitution: kv total revisions: 11; selected revisions: 11 description:

• Modified Makefile rev1.10 - added none, removed none

elphel committed changes to the Elphel project elphel353-8.0 CVS:
changed init sequence

• Modified fpga rev1.32 - added 7 lines, removed none