FriendlyARM-Based Color to Frequency Representation for Media Packaging Color Detection

2013 ◽  
Vol 718-720 ◽  
pp. 1757-1760
Author(s):  
Khanchai Tunlasakun
Keyword(s):  
Research Study ◽  
Frequency Converter ◽  
Output Frequency ◽  
Color Sensor ◽  
Frequency Representation ◽  
Color Detection ◽  
Speed Up ◽  
Color Data ◽  
Difference Mode ◽  
Better Than

This research presents the design and development of a FriendlyARM-based color to frequency representation for media packaging color detection used in small media packaging industrial. The design was based on FriendlyARM Mini 2440 SBC (Single-Board Computer) with 400 MHz Samsung S3C2440 ARM9 processor and the color sensor used in this research was a programmable color light to frequency converter model TCS230 made by Texas Advanced Optoelectronic Solutions (TAOS) company. The frequency information gathered was used to create color to frequency representation. This research study in 4 filter modes: red, blue, green and non filter. Calibrate each CMYK color with standard color checker chart in difference mode. The results of study, the non filter mode can give the results better than red, blue and green mode. The output frequency span between color are 7.432 kHz, 3.5 kHz and 21.31 kHz for Black-Cyan, Cyan-Magenta and Magenta-Yellow frequency spans respectively compared to other filter modes. The advantage of this research are reduce the use of memory for storing the CMYK color data and can speed up the time of restoring and inspecting colors used in media packaging processes.

scholarly journals PKT: fast color-based spatial model for human skin detection

2021 ◽  
Author(s):  
Grace L. Samson ◽  
Joan Lu
Keyword(s):  
Spatial Structure ◽  
Human Skin ◽  
Skin Color ◽  
Skin Detection ◽  
Quad Tree ◽  
Learning Tasks ◽  
Color Detection ◽  
Speed Up ◽  
Image Pixels ◽  
Speed Accuracy

AbstractWe present a new detection method for color-based object detection, which can improve the performance of learning procedures in terms of speed, accuracy, and efficiency, using spatial inference, and algorithm. We applied the model to human skin detection from an image; however, the method can also work for other machine learning tasks involving image pixels. We propose (1) an improved RGB/HSL human skin color threshold to tackle darker human skin color detection problem. (2), we also present a new rule-based fast algorithm (packed k-dimensional tree --- PKT) that depends on an improved spatial structure for human skin/face detection from colored 2D images. We also implemented a novel packed quad-tree (PQT) to speed up the quad-tree performance in terms of indexing. We compared the proposed system to traditional pixel-by-pixel (PBP)/pixel-wise (PW) operation, and quadtree based procedures. The results show that our proposed spatial structure performs better (with a very low false hit rate, very high precision, and accuracy rate) than most state-of-the-art models.

scholarly journals An Open-Source Cloud-FPGA Gene Regulatory Accelerator

2021 ◽  
Author(s):  
Lucas Bragança ◽  
Jeronimo Penha ◽  
Michael Canesche ◽  
Dener Ribeiro ◽  
José Augusto M. Nacif ◽  
...  
Keyword(s):  
Open Source ◽  
Gene Regulatory Networks ◽  
High Performance ◽  
Regulatory Networks ◽  
Cloud Services ◽  
On Demand ◽  
Speed Up ◽  
Gene Regulatory ◽  
High Level ◽  
Better Than

FPGAs are suitable to speed up gene regulatory network (GRN) algorithms with high throughput and energy efficiency. In addition, virtualizing FPGA using hardware generators and cloud resources increases the computing ability to achieve on-demand accelerations across multiple users. Recently, Amazon AWS provides high-performance Cloud's FPGAs. This work proposes an open source accelerator generator for Boolean gene regulatory networks. The generator automatically creates all hardware and software pieces from a high-level GRN description. We evaluate the accelerator performance and cost for CPU, GPU, and Cloud FPGA implementations by considering six GRN models proposed in the literature. As a result, the FPGA accelerator is at least 12x faster than the best GPU accelerator. Furthermore, the FPGA reaches the best performance per dollar in cloud services, at least 5x better than the best GPU accelerator.

MOCUM Code Verification and Sensibility Study Using C5G7 Benchmark

2016 ◽  
Author(s):  
Xue Yang ◽  
Rajan Borse ◽  
Nader Satvat
Keyword(s):  
Method Of Characteristics ◽  
Polar Angle ◽  
Mesh Size ◽  
Sensitivity Study ◽  
High Accuracy ◽  
Benchmark Problem ◽  
Code Verification ◽  
Heterogeneous Effects ◽  
Speed Up ◽  
Better Than

This work uses the 2-D C5G7 benchmark to verify the accuracy of the MOCUM code, a parallel neutronics program based on the method of characteristics (MOC) for solving arbitrary core geometry. Compared to the MCNP results, MOCUM k-eff, maximum assembly and pin power percentage errors are 0.02%, −0.06%, and 0.64%, respectively. The results demonstrate the high accuracy of the MOCUM code. The calculation uses a total of 56 threads, and the runtime on dual Intel Xeon E5-2699 v3 CPUs is 26 minutes, with speed up higher than 50 times. The sensitivity study of various MOC parameters using the calculation of the C5G7 benchmark problem is also performed. The study reveals that C5G7 requires the usage of 48 or more azimuthal angles. The strong flux gradient and the heterogeneous effects need fine unstructured meshes to resolve. The simulation uses 258 million zones with an average mesh size of 0.016 cm2. The investigation of the polar angle quadrature indicates that Leonard polar angle performs slightly better than Gauss-Legendre and Tabuchi polar angles and more than three polar angles are not necessary. In addition, parameter sensitivity study shows that coarse parameters are prone to introduce error to the neutron flux but not k-eff.

scholarly journals The change in the efficiency factor of the pumping unit with a frequency converter

2019 ◽  
Vol 97 ◽  
pp. 05010 ◽  
Author(s):  
Eduard Kan ◽  
Nazir Ikramov ◽  
Muradulla Mukhammadiev
Keyword(s):  
Economic Efficiency ◽  
Water Pressure ◽  
Frequency Converter ◽  
Pump Efficiency ◽  
Test Bed ◽  
Speed Up ◽  
Pump Shaft ◽  
Pumping Unit ◽  
Parameter Measuring ◽  
Pumping Units

This paper gives the results of the investigation of the operation of a pumping unit equipped with a frequency converter. As a rule, it is widely assumed that when changing the speed up to 50 %, the pump efficiency almost does not change, and the possibility of decrease of its efficiency is not taken into consideration when calculating the economic efficiency of the operation of the pumping unit equipped with a frequency converter. However, failure to take account the efficiency decrease may cause inaccurate assessment of the economic efficiency of the use of the frequency converter and, consequently, improper selection of the method of control of the operation of the pumping units. This is particularly important for irrigation pumping plants the operation of which is characterized by large volume of the pumpable volume and less severe requirements for provision of the water pressure required for the consumer. The purpose of this paper is to carry out experiments on a test-bed equipped with a pumping unit, parameter measuring instrument, and a frequency converter, and detection of the pattern of efficiency variation with speed. The paper presents the results of the carried out experiments, the obtained characteristic curves of the variation of different types of the efficiency at variation of the pump shaft speed, as well as their analysis.

The Design of Variable Frequency and Constant Pressure Water Supply System Based on Fuzzy Control

2012 ◽  
Vol 591-593 ◽  
pp. 1247-1250
Author(s):  
Yu Lin Wang ◽  
Yao Bin Hu ◽  
Peng Wei ◽  
Yan Jiang ◽  
Jing Xie
Keyword(s):  
Energy Saving ◽  
Fuzzy Controller ◽  
Frequency Converter ◽  
Fuzzy Arithmetic ◽  
Pipe Network ◽  
Output Frequency ◽  
Pump Speed ◽  
Precise Control ◽  
Pressure Water ◽  
Control Output

This article starts from energy saving and improving energy efficiency, analyzes the characteristics of the pump and collects the pipe network pressure periodically by the pressure sensor, and then we can get the differential pressure signal and send it into fuzzy controller after comparing the pipe network pressure with the set pressure. After a series of fuzzy arithmetic and solution of fuzzy arithmetic, the fuzzy controller sends a precise control into the PID regulator to control output frequency of the frequency converter, so as to achieve the purpose of pump speed controlling and energy-saving.

Fast Color Detection with Two-Terminal P-I-I-N Devices

1996 ◽  
Vol 420 ◽  
Author(s):  
T. Neidlinger ◽  
M. B. Schubert ◽  
G. Schmid ◽  
H. Brummack
Keyword(s):  
Dynamic Range ◽  
Spectral Response ◽  
Hole Transport ◽  
Color Sensor ◽  
Color Separation ◽  
Color Detection ◽  
Color Sensors ◽  
Voltage Transients ◽  
Different Color ◽  
Electric Field Profile

AbstractIn order to overcome the intrinsic speed limitation of amorphous silicon nipin color sensors we present an alternative way of achieving bias-controlled spectral sensitivity of two-terminal thin film devices, piin structures with appropriate band gap and thickness of their single layers can be used as photodetectors that are able to sequentially extract different color signals. Color separation is achieved by controlling the absorption and electric field profile across these piin devices, and thanks to the differences in electron and hole transport properties. Because in contrast to nipin devices there is no need for reverting readout voltages for color separation, this type of sensors can be operated at much higher readout frequencies. Spectral response and bias voltage transients have been analysed up to 20kHz, and preliminiary data are presented on the optimization of speed, dynamic range and color separation by varying bandgap and thickness of p- and i-layers. Furthermore a three-color sensor has been realized by introducing an additional intrinsic layer.

Fabrication of artificial bioactive bone using rapid prototyping

2004 ◽  
Vol 10 (5) ◽  
pp. 327-333 ◽  
Author(s):  
Zhongzhong Chen ◽  
Dichen Li ◽  
Bingheng Lu ◽  
Yiping Tang ◽  
Minglin Sun ◽  
...  
Keyword(s):  
Rapid Prototyping ◽  
Bone Growth ◽  
Animal Experiments ◽  
Artificial Bone ◽  
3D Scaffolds ◽  
Morphogenetic Protein ◽  
Speed Up ◽  
A New Technique ◽  
Soluble Material ◽  
Better Than

A new technique based on rapid prototyping (RP) is proposed to fabricate the mould of artificial bone composed of a nontoxic soluble material. The mould has both an external structure that exactly coincides with the replaced natural bone and an internal 3D scaffolds simulating the bone microtubule structure. By injecting self‐setting calcium phosphate cement (CPC) with bone morphogenetic protein (BMP, a kind of bone growth factors) into the cavities of the mould, the CPC solidified and the micropores can be formed after the internal 3D scaffolds is dissolved, finally the artificial bioactive bone can be produced. This approach is better than the traditional fabrication process, which the latter method cannot fabricate an artificial bone with inter‐connective micropores so as to realize the osteo‐induction for lack of bioactivity. Through animal experiments, it shows that the simulated inter‐structure could provide artificial bone with proper voids for the growth of the bone tissue and the quick activation, and hence effectively speed up the bone growth by means of activating osteo‐conduction and osteo‐induction. So, the new method of fabricating artificial bone with biological behaviors is justified.

An Experimental Analysis of a New Interval-Based Mutation Operator

2015 ◽  
Vol 14 (03) ◽  
pp. 1550018 ◽  
Author(s):  
K. Liagkouras ◽  
K. Metaxiotis
Keyword(s):  
Experimental Analysis ◽  
Pareto Front ◽  
Computational Experiments ◽  
Coarse Grained ◽  
Mutation Operator ◽  
Fine Grained ◽  
Initial Stage ◽  
Speed Up ◽  
Better Than

In this paper, we present a novel Interval-Based Mutation (IBMU) operator. The proposed mutation operator is performing coarse-grained search at initial stage in order to speed up convergence toward more promising regions of the search landscape. Then, more fine-grained search is performed in order to guide the solutions towards the Pareto front. Computational experiments indicate that the proposed mutation operator performs better than conventional approaches for solving several well-known benchmarking problems.

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