Computer-generated hologram calculation for real scenes using a commercial portable plenoptic camera

Investigation of flame radiation sampling and temperature measurement through light field camera

“…Except for the flame temperature measurement, the light field cameras were used in various studies such as face recognition and 3-D dose reconstruction [25][26][27][28][29]. Studies were also undertaken [30][31][32] to investigate the resolution of refocusing images in the field of image rendering where the authors clearly addressed that the different light field cameras have different ratios of spatial to directional resolutions [30][31].…”

“…In contrast, the representative sampled rays are much non-uniform for the traditional light field camera (Lxp =1.0fm) compared to the focused light field camera. Because the traditional light field camera has a least spatial resolution[27] and thus the representative sampled rays are emitted from less number of points [the intersection points of the rays on the virtual focal plane, such as red point inFig 8 (e)]. Therefore, the effective radiation information of the flame obtained by the traditional light field camera is less compared to the focused light field camera.…”

A novel calibration method of focused light field camera for 3-D reconstruction of flame temperature

“…( 10) for further compute of L, l m and S v using Eqs. ( 24)- (26). Then all the parameters which are required to trace the rays of flame radiation are derived finally.…”

“…In recent years, the application of the light field camera is increasing with the maturing of the manufacturing technique of microlens array [22][23][24][25][26][27][28]. To determine the 3-D position of the object, the geometric calibration of the focused light field camera is important.…”

High-Identical Numerical Aperture, Multifocal Microlens Array through Single-Step Multi-Sized Hole Patterning Photolithography

“…Over the last few decades, microlens arrays (MLAs) have become an indispensable optical component, owing to their wide field-of-view (FOV) and simple configurations, and are applied in a wide range of fields, such as bio-inspired compound eye systems [1][2][3][4], computational holograms [5,6], and surveillance cameras [7,8]. In particular, the multiple parallax images from the MLAs have attracted the attention of many research groups working on the application of 3D imaging, and particularly 3D medical imaging systems [9,10], and light field imaging [11][12][13].…”