[Elphel-support] Panoramas From the Backpack

[Olga Filippova]

Hello Grahame,
thank you for the appreciative comments and practical suggestions. Do you
mind posting them on the blog (as a comment to the article) ?
The backpack design can definitely be improved, and other 3D positioning
correction will be done with IMU, once it is ready.

Finishing the IMU is one of the top priorities right now - hardware is
assembled and Andrey is finishing the software for the new IMU/GPS/odometer
logger for the cameras. It is FPGA base; the data from several sources will
be recorded at high rate and transferred to the system memory over DMA
channel to off-load the CPU.

The IMU interface board is designed for the ADIS-16375 we have now, but may
be modified to use with other sensor devices.
GPS interface can process up to 4 NMEA messages (format is run-time
programmable), the data is compressed to fit into 56 byte message (most
numeric filed use 4bits/digit) to the total of 64 bytes (including precise
timestamp)
third channel accepts generic pulses (i.e. odometer) and is also logged with
timestamp
fourth channel logs sync pulses in multi-camera systems (as in Eyesis -
http://blog.elphel.com/2011/02/eyesis-4pi/ )

We are really interested in creating software to support this data from the
high-res panoramic camera, and hope to find somebody to cooperate with to do
that. Additionally we now have very precise distortion calibration of the
camera/lens software, so it may be used to accurately match the pixel
coordinates to the angles in space.

Thanks again for your comments,

Best Regards,


Olga S Filippova
Elphel, Inc.
801.783.5555x107
www.elphel.com



On Wed, Apr 27, 2011 at 10:40 PM, Grahame M. Kelly
<grahame at wildpossum.com>wrote:

> Hi Guys!
>
> Excellent photos and I am sure you all enjoyed the experience
> (especially of lugging a man-mounted-ray-gun around to the amazement of
> other hikers).
>
> Looking at how the Elphel-Eyesis unit is mounted to the back pack, and
> the angle of incline relative to the ground and the hiker's back - I
> wonder would it not be advantages to have the following added to the
> overall project (I not sure this may have been mention before or not -
> Apologies if it has).
>
> 1> S/W to handle the low level (possibly medium impact) vibration(s) and
> varying degree of perpendicular given; the walking steps of a heavy
> backpack unit; probably a sore and unsteady transport (i.e.: Further s/w
> evaluation as was carried out on the truck / Sports Utility vehicle
> movement and picture quality) and variations over different
> transporters.
>
> 2> As the distance travelled by a human is vastly smaller over time than
> a vehicle, a mechanism to reduce the frequency of shots taken (That is:
> the multiple number of shots containing >50% the same scene.) This way,
> the quantity of cached images will be less, but as they carry more that
> 50% of sequential differentiated images, s/w be able to resolve any
> mismatch issues with the auto panorama s/w.
>
> 3> Be nice to have the hikers health (breathing, heart rate, etc)
> recorded so that one could give a "order of merit" / recognition of the
> efforts undertaken in capturing such panoramic images :)
>
> Grahame.
>
>
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>
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