Difference between revisions of "Eyesis4Pi 393"

Revision as of 09:42, 22 December 2016

Available

Elphel Eyesis4Pi-26-393 is the newer generation of the full-sphere multi-camera systems for stereophotogrammetric applications.

The system is calibrated to compensate for optical aberrations allowing to preserve full sensor resolution over the field of view.
Distortion calibration is performed for precise pixel-mapping to automatically stitch images into panoramas, and also for photogrammetry and 3D reconstruction.
There are 24 x 5MPix sensors in the camera head, resulting in 120 MPix image acquisition. Panorama image resolution after stitching is 64 MPix, the equirectangular projection is 14000x7000.
High-precision Inertial Measurement Unit IMU (ADIS 16375, 2400 samples per second) is integrated with the camera, as well as 5Hz GPS (Locosys LS20031) to provide precise position and orientation of the camera.
Images, synchronized with IMU and GPS data, can be recorded to internal Solid State Drives (SSD), external swappable SSDs or to a PC over the network.
Optionally Eyesis4Pi-393 camera system includes PC for image downloading and post-processing with pre-installed SDK and Free and Open Source Software for camera calibration, image acquisition and panorama stitching.
Eyesis4Pi-393 can be mounted on a car for outdoor panoramic applications or carried by a person, which lets successfully create panoramas of small and narrow spaces.^**

Automated panoramic imagery and 3-dimensional panoramas are the 2 main applications of Eyesise4Pi-393 camera.

4*π (360x180) full sphere coverage
64 MPix panoramic image resolution after stitching
Final panoramic image equirectangular projection dimensions - 14000x7000
0.05 Pix stitching precision
Calibrated fixed lens to compensate for the lenses distortions
- 10" (0.1 pix) in the center 80% x 80% area
- 30" (0.3 pix) maximal error over the full FoV
- <0.03um/° thermal expansion
5 FPS - maximum frame rate
Integrated high-precision IMU and GPS
Recording to:
- internal SSDs
- external SSDs
- a PC over network
Web Based GUI
Free Software and Open Hardware

We have developed full calibration process and post-processing software to compensate for:

Optical aberrations, allowing to preserve full sensor resolution over the camera FoV.
Distortions – for precise pixel-mapping for photogrammetry and 3D reconstruction.

Check out this Elphel Development Blog post for more details.

Calibration process

Fig.1 Cables
Fig.2 Recording to swappable external drives	Fig.3 Recording to internal SSDs or over network	Fig.4 Downloading data from internal SSDs to PC

@@ Line 45: / Line 45: @@
 ==Calibration==
 We have developed full calibration process and post-processing software to compensate for:
-* '''Optical aberrations''', allowing to preserve full sensor resolution over the camera FOV
+* '''Optical aberrations''', allowing to preserve full sensor resolution over the camera FoV.
 * '''Distortions''' – for precise pixel-mapping for photogrammetry and 3D reconstruction.
 Check out this [http://blogs.elphel.com/2010/06/elphel-eyesis-camera-optics-and-lens-focus-adjustment/ Elphel Development Blog post] for more details.