Fast Optical Ray Tracing Using Multiple DSPs

Cameron, C.B.; Rodriguez, R.N.; Padgett, Nathan E; Waluschka, Eugène; Kizhner, Semion; Colón, Gloria; Weeks, Charles M.

doi:10.1109/tim.2006.873813

Cited by 6 publications

(5 citation statements)

References 4 publications

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“…Initial estimates were that using digital signal processors (DSPs) would show a linear relationship between the number of DSPs used and speedup [21]. This result was confirmed using eight DSPs simultaneously running a complete MODIS simulation [22]. Using the Message Passing Interface (MPI), the MODIS simulation was subsequently implemented on the Naval Research Laboratory's massively parallel Cray XD1.…”

Section: Implementation Of the Modis Systemmentioning

confidence: 96%

Antigens for a Vaccine that Prevents Severe Malaria

Duffy¹

2008

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Section: Implementation Of the Modis Systemmentioning

confidence: 96%

Antigens for a Vaccine that Prevents Severe Malaria

Duffy¹

2008

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“…Raindrop modeling was also performed using ray tracing [14], [2]. Unfortunately, ray tracing algorithms are computationally very expensive.…”

Section: Introductionmentioning

confidence: 99%

“…Unfortunately, ray tracing algorithms are computationally very expensive. Cameron et al [2] proposed an approach that uses multiple DSPs in order to reduce the processing time, but their approach still does not offer itself to real-time applications. A real-time approach was proposed in [14] that employed two models, the physical model that described the water movement, followed by a lighting model that took Fresnel's reflectivity coefficients into account.…”

Section: Introductionmentioning

confidence: 99%

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Raindrop detection on car windshields using geometric-photometric environment construction and intensity-based correlation

Halimeh

Röser

2009

2009 IEEE Intelligent Vehicles Symposium

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Vision-based Driver Assistance Systems (DAS) are becoming pervasive in today's automotive industry. However, most of these systems are designed to perform in good weather conditions and they perform very poorly in adverse weather particularly in rain. A big problem related to rainy weather conditions that highly limits the performance of DAS is raindrops on car windshields. We present a novel approach that detects raindrops on a car windshield using only a single image from an in-vehicle camera and a standard interest point detector for pre-selection of raindrop candidates. The algorithm models the geometric shape of a raindrop on the car windshield, utilizes its photometric properties and establishes a relationship between raindrop and environment. The proposed algorithm outperforms existing machine vision-based approaches for the task of raindrop modeling and detection from an in-vehicle perspective. It functions very accurately and is robust in terms of imprecise positions of raindrop candidates. Its results can be further used for image restoration and vision enhancement and hence it is a valuable tool for DAS.

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“…Generally speaking, there are two feasible ways to realize parallel processing: by special VLSI (Very Large Scale Integration) technology and by general processor. General processor is more regarded in the field for its widespread use [1,2] .…”

Section: Introductionmentioning

confidence: 99%

Reconfigurable RDMA communication framework of MULTI-DSP

Wang

Zhou

2009

J. Electron.(China)

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The processing speed of the communication between nodes in a parallel processor has become the major bottleneck of the processor's performance. RDMA (Remote Direct Memory Access) technology has drawn more attention recently due to its capability of transferring a larger amount of data, higher speed and reliability. 4DSP (4 Digital Signal Processing) module comprised of Tiger-SHARC201 chip is connected by LVDS (Low Voltage Differential Signal) circuits. This paper proposes a general and reconfigurable RDMA platform and its corresponding communication protocol with all the routes linked based on the zero copy. The protocol transfers message of DSP by interrupting of DMA and is applied on massive remote image impression, which reduces memory needs and working burden of CPU. The experiment results show this platform is efficient, flexible, and expandable of being integrated to a larger scale in the next development stages.

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Fast Optical Ray Tracing Using Multiple DSPs

Cited by 6 publications

References 4 publications

Antigens for a Vaccine that Prevents Severe Malaria

Antigens for a Vaccine that Prevents Severe Malaria

Raindrop detection on car windshields using geometric-photometric environment construction and intensity-based correlation

Reconfigurable RDMA communication framework of MULTI-DSP

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