Compact laser radar and three-dimensional camera

Medina, A. N.; Gayá, Francisco; Pozo, Francisco del

doi:10.1364/josaa.23.000800

Cited by 31 publications

(15 citation statements)

References 6 publications

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“…In the former, transverse resolution is obtained by single-pixel devices via raster scanning [1][2][3]. The latter typically replaces scanning with spatially resolving detectors to acquire the depth map [4,5]. However, LIDAR cameras are limited by the scanning time, and TOF cameras also have limitation in high-resolution array fabrication.…”

Section: Introductionmentioning

confidence: 99%

Three-dimensional single-pixel compressive reflectivity imaging based on complementary modulation

Yao

Liu

et al. 2015

Appl. Opt.

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A three-dimensional (3D) imager with a single-pixel detector and complementary intensity modulation of a digital micromirror device (DMD) array, which does not rely on scene raster scanning as in light detection and ranging (LIDAR) or on a two-dimensional array of sensors as used in time-of-flight (TOF) cameras, can not only capture full-color, high-quality images of real-life objects, but also recover the depth information and 3D reflectivity of the scene, reducing the required measurement dimension as well as the complexity, and cutting the cost of the detector array down to a single unit. The imager achieves spatial resolution using compressed sensing to exploit the sparsity of the signal. The disparity maps of the scene are reconstructed using sum of absolute or squared differences to reveal the depth information. This nonscanning, low-complexity 3D reflectivity imaging prototype may be of considerable value to various computer vision applications.

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Section: Introductionmentioning

confidence: 99%

Three-dimensional single-pixel compressive reflectivity imaging based on complementary modulation

Yao

Liu

et al. 2015

Appl. Opt.

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“…LIDAR systems sequentially make many range (longitudinal) measurements by ToF; raster scanning by a laser light source produces the transverse spatial resolution to form a range image or depth map [1,2]. Homodyne ToF cameras make these measurements simultaneously with a diffuse light source and reflected light focused on an array of sensors, enabling real-time imaging at video rates [3][4][5]. Other methods for obtaining transverse spatial resolution have also recently been introduced [6,7].…”

Section: Introductionmentioning

confidence: 99%

Phase unwrapping and denoising for time-of-flight imaging using generalized approximate message passing

Mei

Kirmani

Colaço

et al. 2013

2013 IEEE International Conference on Image Processing

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We present a new method for simultaneously denoising and unwrapping phase in multi-frequency homodyne time-of-flight ranging for the formation of accurate depth maps despite low SNR of raw measurements. This is achieved with a new generalized approximate message passing (GAMP) algorithm for minimum mean-squared error estimation of the phase. A detailed, physically-accurate acquisition model is central in achieving high accuracy, and the use of the GAMP methodology allows low computational complexity despite dense dependencies and the nonlinearity and non-Gaussianity of the acquisition model. Numerical simulations demonstrate that our integrated approach performs better than separate unwrapping followed by denoising. This performance translates to lowering the optical power consumption of time-of-flight cameras for a fixed acquisition quality.

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“…One of the methods is range gated imaging, which oers the ability to selectively register imaging information. Special property of the range gated imaging consists of the possibility to register image for dened distance and depth of observation [3,4]. Registered images are not just a projection of angular observation range but are a representation of precisely dened three-dimensional fragment of space.…”

Section: Introductionmentioning

confidence: 99%

Laser Photography Device - Spatial Parameters of Imaging

et al. 2013

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Laser photography device is an imaging device developed in the Institute of Optoelectronics, Military University of Technology and it is an example of modern image acquisition device. The laser photography device allows to dene a 3D observation scene thanks to short-time scene illumination and image acquisition method. This device works according to timespatial framing method. In the paper, basics of timespatial framing method are explained. Special attention is given to time parameters of device and their inuence to spatial parameters of registered images. In this paper the laser photography device and results of chosen experiments are presented and described. Experimental results presented in the paper show the potential and possibilities of using the laser photography device as a camera for observation and measurement applications.

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Compact laser radar and three-dimensional camera

Cited by 31 publications

References 6 publications

Three-dimensional single-pixel compressive reflectivity imaging based on complementary modulation

Three-dimensional single-pixel compressive reflectivity imaging based on complementary modulation

Phase unwrapping and denoising for time-of-flight imaging using generalized approximate message passing

Laser Photography Device - Spatial Parameters of Imaging

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