Difference between revisions of "Elphel Eyesis4Pi"
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! scope="col" | Eyesis<br> | ! scope="col" | Eyesis<br> | ||
! scope="col" | | ! scope="col" | | ||
| − | Eyesis4Pi <br> | + | Eyesis4Pi <br> |
| − | (Eyesis 3Pi without 8 bottom modules) | + | (Eyesis 3Pi without 8 bottom modules) |
! scope="col" | Notes<br> | ! scope="col" | Notes<br> | ||
| Line 36: | Line 36: | ||
| Combined field of view (steradians)<br> | | Combined field of view (steradians)<br> | ||
| 3*π<br> | | 3*π<br> | ||
| − | | 4*π (3*π) | + | | 4*π (3*π) |
| <br> | | <br> | ||
|- | |- | ||
| Line 50: | Line 50: | ||
|- | |- | ||
| Angular resolution +30° to +90°(zenith)<br> | | Angular resolution +30° to +90°(zenith)<br> | ||
| − | | <br> | + | | ≥0.83Mpix/steradian<br> |
| − | | | + | | ≥4.2Mpix/steradian |
| − | | <br> | + | | 1<br> |
|- | |- | ||
| − | | | + | | Angular resolution -30° to -90°(nadir) |
| − | | | + | | none |
| − | | | + | | ≥4.2Mpix/steradian (none) |
| − | | <br> | + | | 1<br> |
|- | |- | ||
| − | | | + | | Combined megapixels |
| − | | | + | | 45.0 |
| − | | | + | | 120.0 (80.0) |
| <br> | | <br> | ||
|- | |- | ||
| − | | | + | | Combined megapixels (w/o overlapping areas) |
| − | | | + | | 34.0 |
| − | | | + | | 64.0 (48.0) |
| <br> | | <br> | ||
|- | |- | ||
| − | | <br> | + | | Combined megapixels (w/o overlapping areas,<br>worst case resolution) |
| − | | | + | | 29.0 |
| − | | | + | | 52.8 (39.6) |
| − | | | + | | 1,2 |
|- | |- | ||
| − | | <br> | + | | Distance between entrance pupils<br>of adjacent horizontal lenses |
| − | | | + | | 34.5mm |
| − | | | + | | 46.5mm |
| <br> | | <br> | ||
|- | |- | ||
| − | | <br> | + | | Distance between entrance pupils<br>of horizontal and top/bottom lenses |
| − | | | + | | 75mm |
| − | | | + | | 50mm |
| − | | <br> | + | | 3<br> |
|- | |- | ||
| − | | | + | | Maximal frame rate |
| − | | | + | | 5fps |
| − | | | + | | 5fps |
| − | | <br> | + | | 4<br> |
|- | |- | ||
| − | | | + | | Maximal recording data rate |
| − | | | + | | 48MB/s |
| − | | | + | | 128MB/s (96Mb/s) |
| <br> | | <br> | ||
|- | |- | ||
| − | | | + | | Maximal direct network data rate |
| − | | | + | | 30MB/s |
| − | | | + | | 80MB/s (60MB/s) |
| <br> | | <br> | ||
|- | |- | ||
| − | | | + | | GPS receiver |
| − | | | + | | external, USB |
| − | | | + | | External/internal, USB/RS232 |
| <br> | | <br> | ||
|- | |- | ||
| − | | | + | | GPS pulse-per-second input |
| − | | <br> | + | | no<br> |
| − | | <br> | + | | yes<br> |
| <br> | | <br> | ||
|- | |- | ||
| − | | | + | | IMU |
| − | | | + | | none |
| − | | | + | | ADIS163xx,ADIS164xx |
| <br> | | <br> | ||
|- | |- | ||
| − | | | + | | Data unload |
| − | | | + | | removable SSD in cradles |
| − | | | + | | eSATAx2 |
| <br> | | <br> | ||
|- | |- | ||
| − | | | + | | Storage devices type |
| − | | | + | | 2.5″ SSD |
| − | | | + | | 1.8″SSD |
| <br> | | <br> | ||
|- | |- | ||
| − | | | + | | Number of storage devices |
| − | | <br> | + | | 3<br> |
| − | | <br> | + | | 8 (6)<br> |
| <br> | | <br> | ||
|} | |} | ||
| − | |||
| − | |||
<br>Notes: | <br>Notes: | ||
| − | #Angular resolution per pixel differs in the sub-camera FOV, minimal resolution is used.<br> | + | #Angular resolution per pixel differs in the sub-camera FOV, minimal resolution is used.<br> |
| − | #Zenith area for Eyesis (covered by fisheye lens) is calculated separately.<br> | + | #Zenith area for Eyesis (covered by fisheye lens) is calculated separately.<br> |
| − | #For Eyesis the distance is measured from the entrance pupil of the horizontal lens to that of the top fisheye, for Eysis-4pi – to the entrance pupil of the lens immediately above/below the first one.<br> | + | #For Eyesis the distance is measured from the entrance pupil of the horizontal lens to that of the top fisheye, for Eysis-4pi – to the entrance pupil of the lens immediately above/below the first one.<br> |
#Frame rate may be limited by the recording (or network if the SSD are not used) datarate for high compression quality (>0.3 bytes/pixel), required for the aberration correction.<br><br> | #Frame rate may be limited by the recording (or network if the SSD are not used) datarate for high compression quality (>0.3 bytes/pixel), required for the aberration correction.<br><br> | ||
<br> | <br> | ||
Revision as of 05:02, 10 August 2011
Contents
About
Elphel Eyesis4Pi is an open hardware / free software panoramic camera solution that is able to capture high-resolution - 64 MPix total (120 MPix before stitching) - 360° panoramas at a rate up to 5 frames per second at full resolution. It is the successor of the Elphel Eyesis. Images are recorded to 8 solid-state-discs (Eyesis4Pi Data Storage) which can store up to 11 hours of footage at full resolution. Meta-data like GPS-coordinates (geotags), viewing direction, movement speed, etc. are directly embedded into the images EXIF fields. Eyesis4Pi uses 24 sensor-front-ends and high-grade lenses that are triggered simultaneously with microsecond accuracy to ensure a full homogeneous spherical snapshot.
Usage Scenarios
The system was designed to be small and lightweight with a minimal distance between the entrance pupils (46.5mm) to achieve lowest possible parallax.
The primary usage scenario is to mount Eyesis4Pi on the roof of a vehicle. When driving at 50 mph (22.3 m/s) and recording at 5 FPS a full panorama is captured every 4.46 meters.
Operation & Monitoring
Eyesis is controlled from a laptop, via a web-based interface (Eyesis GUI). Which also displays real-time previews of your captured panorama footage.
Eyesis is supplied with 110V/220V AC and can be used with car power adapter (inverter), when mounted on a car roof. Power consumption is around ???W.
Models
4π (or 4Pi) corresponds to a full full spherical (360°x180°) field of view in steradians.
There are 2 version of the camera Eyesis4Pi with 24 image sensors and full sperical field of view and Eyesis3Pi with 16 sensors (without 8 bottom modules) with slightly smaller field of view.
Comparison between Eyesis and Eyesis4Pi
| Parameter |
Eyesis |
Eyesis4Pi (Eyesis 3Pi without 8 bottom modules) |
Notes |
|---|---|---|---|
| Combined field of view (steradians) |
3*π |
4*π (3*π) | |
| Number of image sensors |
9 |
24 (16) |
|
| Angular resolution +/-30° from the horizon |
≥4.2Mpix/steradian |
≥4.2Mpix/steradian |
1 |
| Angular resolution +30° to +90°(zenith) |
≥0.83Mpix/steradian |
≥4.2Mpix/steradian | 1 |
| Angular resolution -30° to -90°(nadir) | none | ≥4.2Mpix/steradian (none) | 1 |
| Combined megapixels | 45.0 | 120.0 (80.0) | |
| Combined megapixels (w/o overlapping areas) | 34.0 | 64.0 (48.0) | |
| Combined megapixels (w/o overlapping areas, worst case resolution) |
29.0 | 52.8 (39.6) | 1,2 |
| Distance between entrance pupils of adjacent horizontal lenses |
34.5mm | 46.5mm | |
| Distance between entrance pupils of horizontal and top/bottom lenses |
75mm | 50mm | 3 |
| Maximal frame rate | 5fps | 5fps | 4 |
| Maximal recording data rate | 48MB/s | 128MB/s (96Mb/s) | |
| Maximal direct network data rate | 30MB/s | 80MB/s (60MB/s) | |
| GPS receiver | external, USB | External/internal, USB/RS232 | |
| GPS pulse-per-second input | no |
yes |
|
| IMU | none | ADIS163xx,ADIS164xx | |
| Data unload | removable SSD in cradles | eSATAx2 | |
| Storage devices type | 2.5″ SSD | 1.8″SSD | |
| Number of storage devices | 3 |
8 (6) |
|
Notes:
- Angular resolution per pixel differs in the sub-camera FOV, minimal resolution is used.
- Zenith area for Eyesis (covered by fisheye lens) is calculated separately.
- For Eyesis the distance is measured from the entrance pupil of the horizontal lens to that of the top fisheye, for Eysis-4pi – to the entrance pupil of the lens immediately above/below the first one.
- Frame rate may be limited by the recording (or network if the SSD are not used) datarate for high compression quality (>0.3 bytes/pixel), required for the aberration correction.
