Dr. Jose de Jesus Rangel-Magdaleno Profile

Dr. Jose de Jesus Rangel-Magdaleno

at Instituto Nacional de Astrofísica, Óptica y Electrónica

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Publications (4)

Proceedings Article | 4 May 2020 Presentation + Paper

Hardware parallel architecture proposed to accelerate the orthogonal matching pursuit compressive sensing reconstruction

C. Osorio Quero, D. Durini, R. Ramos-Garcia, J. Rangel-Magdaleno, J. Martinez-Carranza

Proc. SPIE. 11396, Computational Imaging V

KEYWORDS: Signal to noise ratio, Video acceleration, Detection and tracking algorithms, Chemical species, Image processing, Video, Image restoration, Signal processing, Reconstruction algorithms, Compressed sensing

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The compressive sensing (CS) technique is a novel tool used to reconstruct images using fewer samples, normally sparse in the transform domain, than those required by conventional imaging systems. However, the methods applied for signal reconstruction within the CS approach still present some problems in the implementation, mainly due to their intensive computational demand and high power consumption requirements. These drawbacks need addressing if this approach is followed in systems aimed at e.g. drone autonomous flying or other embedded applications that additionally require very short processing times. In this paper we evaluate the use of hardware based parallel processing architecture for the implementation of the Orthogonal Matching Pursuit (OMP) algorithm, one of the most efficient CS reconstruction algorithms developed so far. To improve the algorithm performance, we target different maximum allowed processing times to reach minimum image resolutions required by each system of interest using different sparse (16 and 64) amounts of single-pixel generated samples per image. We also target the final image resolution to be above 20 dB in terms of the peak signal-to-noise ratio (PSNR). To reduce the execution and processing times required to generate each image, we propose implementing parallel kernels in the hardware platform for each of the operations required by the algorithms under study. In the proposed implementation the reconstructed images are used to generate video streams that form the foundation on which decisions are to be made by the system in continuous time, whereby each single image (frame) reconstruction cannot overcome 30 ms in order to maintain the minimum amount of frames per second (fps) above 33 (minimum required for an acceptable video stream). The implementation of a variation of the OMP algorithm in a graphics processing unit (GPU) using parallel architecture approach allows obtaining processing times 4 or 5 times shorter than those obtained if central processing unit (CPU) based architecture implementation is used for the same purpose.

Proceedings Article | 28 April 2020 Paper

Implementation of a hyperspectral integrated vision system combining radar technology and single-pixel optical principle for unmanned ground vehicles (UGV)

C. Osorio Quero, D. Durini, R. Ramos-García, J. Rangel-Magdaleno, J. Martinez-Carranza, J. L. Olvera, A. Corona

Proc. SPIE. 11408, Radar Sensor Technology XXIV

KEYWORDS: Radar, Near infrared, Photodetectors, Indium gallium arsenide, Light emitting diodes, Imaging systems, Sensors, Spatial resolution, Orthogonal frequency division multiplexing, Ranging

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During the last decades the radio detecting and ranging (RADAR) technology underwent an evolution transiting from the linear-frequency-modulated (LFM) systems developed in the 1970s, up to the orthogonal frequency-division multiplexing (OFDM) systems developed in the early 2000s. In mid 2010s, systems were proposed that combined the radar principle with optical solutions developed for imaging and ranging tasks following a hyperspectral embedded systems approach. The idea was to profit on the one side from the possibility offered by RADAR systems to work in harsh environments using emitted radio waves and detect mainly metal objects placed far away (hundreds of meters or even kilometers) from the detection system with positioning spatial resolutions in tens of centimeters, even if there are non-metallic barriers such as e.g. walls in between; and expand this possibility by using optical systems (e.g. light detecting and ranging –LIDAR- systems), using visible light active illumination, capable of generating 2D and 3D images of objects placed at much smaller distances from the detector, but allowing for much higher spatial resolutions (in the millimeter range). To reduce the atmospheric absorption of the emitted active illumination and increase the emitted optical power allowed for these systems that can correctly function even in harsh environments, we propose shifting the active illumination wavelengths from the visible range to the near infra-red (NIR) range, e.g. to 1550 nm. Lacking affordable image sensors fabricated in InGaAs technology, capable of detecting NIR radiation, in this paper we propose a hyperspectral imaging system using a very low power consuming single commercially available InGaAs photodiode to generate 2D images using the single-pixel imaging (SPI) approach based on compressive sensing (CS) and an array of NIR light emitting LEDs, combined with an 80 GHz millimeter band RADAR. The system is conceived to deliver a maximum radar range of 150 m with a maximum spatial resolution of ≤ 5 cm and a RADAR cross-section (RCS) of 10 – 50 m², combined with an optical system capable of generating 24 fps video streams based on SPI generated images yielding a maximum ranging depth of 10 m with a spatial resolution of < 1 cm. The proposed system will be used in unmanned ground vehicle (UGV) applications enabling decision making in continuous time. The power consumption, dimensions and weight of the hyperspectral ranging system will be adjusted to the UGV targeted applications.

Proceedings Article | 27 April 2020 Paper

Evaluation of a 3D imaging vision system based on a single-pixel InGaAs detector and the time-of-flight principle for drones

C. Osorio Quero, D. Durini, R. Ramos-Garcia, J. Rangel-Magdaleno, J. Martinez-Carranza

Proc. SPIE. 11402, Three-Dimensional Imaging, Visualization, and Display 2020

KEYWORDS: Near infrared, Photodetectors, Indium gallium arsenide, Light emitting diodes, Imaging systems, Sensors, Image processing, Photodiodes, Distance measurement, Spatial resolution

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SPIE Journal Paper | 12 June 2017

Use of kurtosis for locating deep blood vessels in raw speckle imaging using a homogeneity representation

Hayde Peregrina-Barreto, Elizabeth Perez-Corona, Jose Rangel-Magdaleno, Ruben Ramos-Garcia, Roger Chiu, Julio Ramirez-San-Juan

JBO Vol. 22 Issue 06

KEYWORDS: Blood vessels, Speckle imaging, Speckle, Biological research, Blood circulation, Visual analytics, Visualization, Tissues, Laser speckle imaging, Tissue optics

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