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Camera Array


Mark I:(2003)


Equipments:

Camera array:

A camera array using eight Sony CCX-Z11 CCD cameras is constructed as shown in FIg. 3(a). THe outputs are in NTSC format (525-lines interlaced video at 25 f/s) and they are synchronized by modifying the electronics inside the cameras so that they operate on the same clock signal. The spacing between successive cameras is 2.5 cm and four tuning screws are used to control the tilting angles of each camera. NOte that all these components are relative inexpensive and the system can readily be extended to include more cameras.

Computers:

In our prototype system, eight Pentium 4 1.8-GHzcomputers are connected together through a 100 Base-T LAN as shown in the left. At 1.8 GHz, it is possible to perform software-assisted real-time MPEG-2 compression at a resolution of (720*480)using the Pinnacle PCTV capturing board.

Camera Calibration:

To precisely calibrate the camera, five images(the grid images) of a certain grid pattern, which consists of squares evenly spaced in the regular grid, are taken by the camera at five different positions.

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Snapshots:

 

Four snapshots of the plenoptic video Glass Music Box and Crystal Dragon. Each Row consists of the egithe images taken from the cameras (from left to
right ) at a given time instant.
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Mark II: (2005)

Equipments:

This system consist of two linear arays of cameras, each hosting 6 JVC DR-DVP9ah video cameras. The spacing between successive cameras in the two linear arrays is 15cm and the angle between the arrays can be flexibly adjusted. More arrays may be added to the system to form longer segments, or place on a plane. Because the video are recorded on tapes, the system is also more portable for capturing outdoor dynamic scenes.
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Snapshots:

The above figure shows snapshots of plenoptic videos, titled Dance, Captured by this system. This real-scene plenoptic video has a resolution of 720*576 pixels in 24-b RGB format.

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