Proj_Acquisition

Light-Field Acquisition Methods at the HCI

 

Light-field acquisition via multi-camera arrays

One can obtain a sparse sampling of the light field of a scene by acquiring a number of views from different view points. This can be done in a straight-forward manner using an array of cameras which capture the scene simultaneously. The different views can be high-resolution, and this kind of setup can be capable of acquiring dynamic scenes. We have four setups available even to capture heterogeneous light field. Here each camera possesses different properties light different attached polarization filters and color filters.

Monochromatic Camera Array Technical Data
Camera Basler acA2500-14gm
No. of Cameras 15
Shutter rolling
Framerate 14fps
Resolution 2592px x 1944px
Sensor MT9P031
Monochromatic Camera Array
Camera Basler acA1920-155gm
No. of Cameras 15
Shutter global
Framerate 160fps
Resolution 1920px x 1200px
Sensor IMX174
Heterogeneous Camera Array
Camera Basler acA2500-14gm
No. of Cameras 11
Shutter rolling
Framerate 14fps
Resolution 2592px x 1944px
Sensor MT9P031

 
 

Light-field acquisition via translation stage

For static scenes, a cheaper way to capture them is by using a single moving camera, which can however only be used for static scenes. We have two setups available, one to capture a 4D light field of a scene (a “Lumigraph”), the other to acquire a hight-precise 3D light field of a scene. This system is equipped with an PCO5.5 camera mounted on an OWIS limes 170 translation stage. Thus high-quality light fields can be captured of close located objects.

High precision 2D translation stage Technical Data
Camera PCO edge 5.5 USB
Sensor SCMOS
Shutter global
Readout Noise 1.3e @ 100 Hz
Translation Table PI C-863
Translation Table PI C-863
Mobile High precision horizontal (1D) translation stage
Camera PCO edge 5.5 USB
Sensor SCMOS
Shutter global
Readout Noise 1.3e @ 100 Hz
Rotation Table OWIS DMT 130N
Bidirectional repetitiv error 0.01°
Angular resolution 174.5 μrad
Translation Table OWIS Limes 160
Positioning error 10 μm
Repetitiv error 3 μm
Embedded Computer Image Technologies, Vision Box AGE-X