Difference between revisions of "Camera suite"

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(Calibration targets)
(Calibration targets)
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File:8.5x11in-tag-mosaic-1.5in.png|8.5x11 mosaic with 1 inch tags [[Media:8.5x11in-tag-mosaic-1in.pdf|(PDF)]] [[Media:8.5x11in-tag-mosaic-1in.png|(png)]]
 
File:8.5x11in-tag-mosaic-1.5in.png|8.5x11 mosaic with 1 inch tags [[Media:8.5x11in-tag-mosaic-1in.pdf|(PDF)]] [[Media:8.5x11in-tag-mosaic-1in.png|(png)]]
 
</gallery>
 
</gallery>
 +
 +
We recommend mounting these targets on foam poster board. It can
 +
usually be done quite cheaply and quickly (about $5/ sq ft), for
 +
example at Kinkos.  If you can find out the email address for your
 +
local FedEx Office, usually formatted country###@fedex.com, you can
 +
use the following as a template to order by email:
 +
 +
<pre>
 +
Hi, I would like to print ## copies of the
 +
8.5x11in-tag-mosaic-1.5in.pdf on a foam mounted matte paper, (I was
 +
quoted 5/sq ft for the foam mounting, plus printing)  The file is a
 +
72dpi raster; it's important that if it is resized (e.g. to 300dpi),
 +
that no interpolation/resampling is done to ensure a crisp transition
 +
from black to white on the borders.
 +
 +
Please let me know when I can get them, and/or contact me if you have
 +
questions. Also, I won't need to see a proof, assuming the final
 +
output preserves crisp transitions from black to white.
 +
 +
Thanks!
 +
Your Name
 +
Cell: +1 (555) 555-5555
 +
Attachments: 8.5x11in-tag-mosaic-1.5in.pdf
 +
</pre>
  
 
== JCam basics (hardware camera library) ==
 
== JCam basics (hardware camera library) ==

Revision as of 20:59, 21 April 2013

The APRIL camera calibration suite is now available in the master branch of the APRIL Robotics Toolkit. Located in april.camera, this suite computes accurate camera calibrations and results are more repeatable than popular alternatives like OpenCV (as determined by human trials). A 2D grid of AprilTags is required for calibration and removes the need for observing the entire calibration target for detection. Interactive single-camera calibration via AprilCal is great for novices and experts alike and provides target position suggestions to ensure highly-accurate calibrations. Flexible multi-camera calibration is also supported without interactive suggestions

More information on its way

Calibration targets

We recommend mounting these targets on foam poster board. It can usually be done quite cheaply and quickly (about $5/ sq ft), for example at Kinkos. If you can find out the email address for your local FedEx Office, usually formatted country###@fedex.com, you can use the following as a template to order by email:

Hi, I would like to print ## copies of the
8.5x11in-tag-mosaic-1.5in.pdf on a foam mounted matte paper, (I was
quoted 5/sq ft for the foam mounting, plus printing)  The file is a
72dpi raster; it's important that if it is resized (e.g. to 300dpi),
that no interpolation/resampling is done to ensure a crisp transition
from black to white on the borders.

Please let me know when I can get them, and/or contact me if you have
questions. Also, I won't need to see a proof, assuming the final
output preserves crisp transitions from black to white.

Thanks!
Your Name
Cell: +1 (555) 555-5555
Attachments: 8.5x11in-tag-mosaic-1.5in.pdf

JCam basics (hardware camera library)

AprilCal

MultiCameraCalibrator

Recommended camera model

Image rectification

Stereo rectification