Large field-of-view three-dimensional imaging with low computational complexity using random microlens array

It has been discovered that image motions and optical flows usually become much more nonlinear and anisotropic in space-borne cameras with large field of view, especially when perturbations or jitters exist. The phenomenon arises from the fact that the attitude motion greatly affects the image of the three-dimensional planet. In this paper, utilizing the characteristics, an optical flow inversion method is proposed to treat high-accurate remote sensor attitude motion measurement. The principle of the new method is that angular velocities can be measured precisely by means of rebuilding some nonuniform optical flows. Firstly, to determine the relative displacements and deformations between the overlapped images captured by different detectors is the primary process of the method. A novel dense subpixel image registration approach is developed towards this goal. Based on that, optical flow can be rebuilt and high-accurate attitude measurements are successfully fulfilled. In the experiment, a remote sensor and its original photographs are investigated, and the results validate that the method is highly reliable and highly accurate in a broad frequency band.

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Comparison of Film and Video Techniques for Estimating Three-Dimensional Coordinates within a Large Field

International Journal of Sport Biomechanics ◽

10.1123/ijsb.8.2.145 ◽

1992 ◽

Vol 8 (2) ◽

pp. 145-151 ◽

Cited By ~ 20

Author(s):

Rosa M. Angulo ◽

Jesús Dapena

Keyword(s):

Video Analysis ◽

Three Dimensional ◽

Control Object ◽

Field Of View ◽

Large Field ◽

Wide Field ◽

Film Analysis ◽

Analysis Techniques ◽

Wide Field Of View ◽

Film And Video

This study compared the errors produced with 3-D video and film analysis techniques using the DLT method with fixed cameras when the images cover a wide field of view. The results indicated that with a large field of view (8 meters) the accuracy of video analysis is clearly inferior to that of film analysis. However, within the volume of the control object, both film and video analyses are still precise enough for most practical purposes. Errors were larger in landmarks outside the control object than in the points of the control object. The maximum errors in the calculated positions of external landmarks were particularly large in the video analysis. However, even these rather large errors for points markedly outside the control object may be acceptable. It will depend on the requirements of each particular investigation.

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Viewing zones in three-dimensional imaging systems based on lenticular, parallax-barrier, and microlens-array plates

Applied Optics ◽

10.1364/ao.43.004985 ◽

2004 ◽

Vol 43 (26) ◽

pp. 4985 ◽

Cited By ~ 62

Author(s):

Jung-Young Son ◽

Vladmir V. Saveljev ◽

Jae-Soon Kim ◽

Sung-Sik Kim ◽

Bahram Javidi

Keyword(s):

Three Dimensional ◽

Microlens Array ◽

Imaging Systems ◽

Three Dimensional Imaging

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Light-Sheet Microscopy for Surface Topography Measurements and Quantitative Analysis

Sensors ◽

10.3390/s20102842 ◽

2020 ◽

Vol 20 (10) ◽

pp. 2842 ◽

Cited By ~ 1

Author(s):

Zhanpeng Xu ◽

Erik Forsberg ◽

Yang Guo ◽

Fuhong Cai ◽

Sailing He

Keyword(s):

Surface Topography ◽

Spatial Resolution ◽

Scattered Light ◽

Three Dimensional ◽

Light Sheet ◽

Field Of View ◽

Large Field ◽

Linear Calibration ◽

Industrial Sample ◽

Light Sheet Microscopy

A novel light-sheet microscopy (LSM) system that uses the laser triangulation method to quantitatively calculate and analyze the surface topography of opaque samples is discussed. A spatial resolution of at least 10 μm in z-direction, 10 μm in x-direction and 25 μm in y-direction with a large field-of-view (FOV) is achieved. A set of sample measurements that verify the system′s functionality in various applications are presented. The system has a simple mechanical structure, such that the spatial resolution is easily improved by replacement of the objective, and a linear calibration formula, which enables convenient system calibration. As implemented, the system has strong potential for, e.g., industrial sample line inspections, however, since the method utilizes reflected/scattered light, it also has the potential for three-dimensional analysis of translucent and layered structures.

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