Sub-aperture


Similar to an array of cameras, the Standard Plenoptic Camera allows for a multiview image acquisition. However, in contrast to a camera array, a plenoptic camera requires image processing to extract these so called sub-apertures (multiview images). As seen in the animation below, each micro image position u is highlighted by a colour representing a sub-aperture. Further details explaining the baseline and tilt angle can be found on Virtual Camera Array.


Sub-aperture using the ray tracing intersection model

Following to the suggested model, the extraction procedure selects all pixels sharing the same position u, i.e. same colour, under each micro lens and places them in a new image whereas each selected pixel is rearranged based on its dedicated micro lens position s. For instance, the central position u1, highlighted in yellow color, corresponds to the central view and surrounding positions u, e.g. blue or green, represent adjacent views from different perspective. Accordingly, the extraction process implies that the number of sub-aperture views amounts to the micro image resolution and the effective resolution of a sub-aperture image equals the number of micro lenses in the plenoptic camera it has been captured with. Below you can find an alternative scheme illustrating the rearrangement of pixels in the sub-aperture extraction process.



Sub-aperture Extraction


Related Publications



Light field geometry of a standard plenoptic camera

C. Hahne, A. Aggoun, S. Haxha, V. Velisavljevic, and J. Fernández, "Light field geometry of a standard plenoptic camera," Opt. Express 22, 26659-26673 (2014).

[PDF] [BibTex]


Baseline of virtual cameras acquired by a standard plenoptic camera setup

C. Hahne, A. Aggoun, S. Haxha, V. Velisavljevic, and J. Fernández, "Baseline of virtual cameras acquired by a standard plenoptic camera setup," in 3D-TV-Conference: The True Vision - Capture, Transmission and Display of 3D Video (3DTV-CON), 2-4 July 2014.

[PDF] [BibTex]


Embedded FIR filter design for real-time refocusing using a standard plenoptic video camera   [Invited paper]

C. Hahne and A. Aggoun, "Embedded FIR filter design for real-time refocusing using a standard plenoptic video camera," Proc. SPIE 9023, in Digital Photography X, 902305 (March 7, 2014).

[PDF] [BibTex]



If you have any questions, feel free to contact:   info [ät] christopherhahne.de