Using Field Interdependence to Improve Correction Performance in a Transducer-Based OCR Post-Processing System

2010 ◽  
Author(s):  
Juan-Carlos Perez-Cortes ◽  
Rafael Llobet ◽  
J. Ramon Navarro-Cerdan ◽  
Joaquim Arlandis
Keyword(s):  
Processing System ◽  
Post Processing

UMDVP-controlled post-processing system for compressed video

2004 ◽  
Author(s):  
Yibin Yang ◽  
Lilla Boroczky ◽  
Kees van Zon
Keyword(s):  
Processing System ◽  
Compressed Video ◽  
Post Processing

Fuzzy Proximity based Robust Data Hiding Scheme with Interval Threshold

2022 ◽  
Author(s):  
Prabhas Kumar Singh ◽  
Biswapati Jana ◽  
Kakali Datta
Keyword(s):  
Fuzzy Logic ◽  
Data Hiding ◽  
Processing System ◽  
Visual Quality ◽  
Structural Similarity ◽  
Secret Message ◽  
Secret Key ◽  
Post Processing ◽  
Coincidence Problem ◽  
Shared Secret

Abstract In 2020, Ashraf et al. proposed an interval type-2 fuzzy logic based block similarity calculation using color proximity relations of neighboring pixels in a steganographic scheme. Their method works well for detecting similarity, but it has drawbacks in terms of visual quality, imperceptibility, security, and robustness. Using Mamdani fuzzy logic to identify color proximity at the block level, as well as a shared secret key and post-processing system, this paper attempts to develop a robust data hiding scheme with similarity measure to ensure good visual quality, robustness, imperceptibility, and enhance the security. Further, the block color proximity is graded using an interval threshold. Accordingly, data embedding is processed in the sequence generated by the shared secret keys. In order to increase the quality and accuracy of the recovered secret message, the tampering coincidence problem is solved through a post-processing approach. The experimental analysis, steganalysis and comparisons clearly illustrate the effectiveness of the proposed scheme in terms of visual quality, structural similarity, recoverability and robustness.

Study on Hydrodynamic Performance of a Dish-Shaped Underwater Vehicle

2010 ◽  
Author(s):  
Yumin Su ◽  
Zhaoli Wang
Keyword(s):  
Numerical Method ◽  
Processing System ◽  
Least Square Method ◽  
Underwater Vehicle ◽  
Least Square ◽  
Hydrodynamic Performance ◽  
Hydrodynamic Coefficients ◽  
Post Processing ◽  
Motion Mechanism ◽  
Planar Motion Mechanism

A new kind of dish-shaped underwater vehicle was designed. The maneuverability of the dish-shaped underwater vehicle (UV) is predicted in this paper. Hydrodynamic coefficients of the vehicle were calculated in numerically. The numerical method applied is one of the tools available in the commercial computational fluid dynamics software FLUENT. The dynamic mesh system and post-processing system are adopted in the numerical method. By simulating numerically straight motion, inclined motion and planar motion mechanism (PMM) experiment, the hydrodynamic performance in different states were obtained. Based on the least square method, the hydrodynamic coefficients of maneuverability were obtained. The calculated results indicate that the numerical method is suitable.

Development of Post-Processing System for Three Types of Five-Axis Machine Tools Based on Solid Model

2017 ◽  
Author(s):  
J. Li ◽  
Yangpeng Song ◽  
Ye Liu
Keyword(s):  
User Interface ◽  
Data Processing ◽  
Machine Tool ◽  
Processing System ◽  
Data Access ◽  
Interface Layer ◽  
Solid Model ◽  
Post Processing ◽  
Nc Data ◽  
Five Axis

Although machine control data can be obtained by means of converting cutter location (CL) data comprised of the tool tip coordinate and the tool axis orientation vector in the workpiece coordinate frame with postprocessor, it’s uncertain whether they can be used for 5-axis machining. Owing to the fact that most postprocessors focus on the method to derive solutions for the equations of NC data by the form-shaping function matrix and the inverse kinematics model without taking the manufacturing scene into consideration, this study has presented a new post-processing system to generate and optimize NC data more effectively by correcting and selecting optimum solution intelligently for machining based on the solid model of machine tool in simulation environment. In general, the post-processing system consists of user interface layer, data access layer and data processing layer to give expression to the characteristics of universality, practicality and adaptability. User interface layer is mainly about loading the machine model and setting the relevant parameters. Data access layer includes model library of generalized five-axis machine tool configurations, rules library of cutter location data and NC data. Data processing layer is the major research in the paper, which illustrates how to correct the inverse solutions set and select the optimization solution for actual machining. The visual interface for post-processing system written by C++ was successfully applied in the experiment on a five-axis machine tool with a C-axis behind a B-axis rotary table, which demonstrated the effectiveness of the proposed post-processing methodology in the field of manufacturing.

scholarly journals Increasing Post-Processing Total Nucleated Cell (TNC) Recovery in Cord Blood Banking: Hespan Addition in cGMP Environment

Blood ◽  
2014 ◽  
Vol 124 (21) ◽  
pp. 1126-1126
Author(s):  
Ludy Dobrila ◽  
Tracy Zhu ◽  
Dan Zamfir ◽  
Tao Wang ◽  
Michal J Tarnawski ◽  
...  
Keyword(s):  
Cord Blood ◽  
Conflicts Of Interest ◽  
Processing System ◽  
Reduction Process ◽  
Buffy Coat ◽  
Stability Study ◽  
Volume Reduction ◽  
Post Processing ◽  
Hematopoietic Stem ◽  
Cell Counts

Abstract Purpose. Evaluate the effects of HESPAN (HES) addition on indices of cord blood unit (CBU) potency, stability and safety after automated volume reduction (reduction of erythrocyte bulk and plasma volume) using the AXP AutoXpressTM (AXP) processing system. Background and Methods. TNC recovery varies significantly and unpredictably after volume reduction during CBU processing. However, prompt engraftment of CBU allotransplants correlates with their TNC including hematopoietic stem/progenitor cells (HPC). As a result, TNC is important in selecting CBU for transplantation: for example, 75% of the National Cord Blood Program (NCBP) CBUs shipped during the period 2010-2013 had TNC >120 x 107. Therefore, minimizing TNC losses during processing improves the chances that a CBU will be useful for clinical transplantation. The first method to increase post-processing TNC recovery was the addition of HES to the centrifugal method for CB volume reduction [Rubinstein et al, PNAS (USA), 92:10119-10122, 1995]. Volume reduction consists of concentrating the buffy-coat (containing leukocytes and HPC) by centrifugal stratification and removal of bulk red cells and platelet-containing plasma. NCBP processed manually over 30,000 CBUs using HES during the period 1995-2006. In 2006, the AXP, a closed, automated and FDA-approved processing method, without HES, was implemented. AXP was designed to enhance the MNC and CD34+ cell recoveries but not those of granulocytes. This resulted in lower post- processing TNC counts. Additionally, CBUs with larger volume and TNC content have somewhat higher TNC losses during automated processing. Using the AXP method, NCBP’s HEMACORD® obtained FDA License approval on November 10, 2011. However, since TNC (not MNC or CD34+ count) remains the most commonly used indicator of CBU potency and engraftment ability, we describe here implementation of HES in AXP processing to augment TNC recovery, by adding HES to the CBU to a 1-2% final concentration. Results.The results of manual CBU processing showed that HES addition improves yield, without changes in cell viability after cryopreservation, freezing at -196°C and thawing, after 20 years (from NCBP continuing stability study). HES addition also preserved CFU numbers and CD34+ cell counts after thawing. 1. Comparison of TNC recoveries without and with HES addition in the same CBU: A total of 25 CBUs were initially processed with the AXP platform without HES, as per routine procedure, and the TNC recoveries were calculated. Each CBU was then reconstituted after its initial processing into a new AXP bag set. HES was added aseptically to the reconstituted product and each CBU was processed in the same conditions as first time (same AXP device, centrifuge, etc.). The TNC recoveries after the second volume reduction process (AXP with HES) were ~20% higher on average than after the first (AXP without HES). 2. Comparison of TNC recoveries in different cohorts of CBUs: Thirty clinical-grade CBUs, with volumes 80-156 mL and TNC counts 111-290 x 107, were processed with HES in the AXP system and the results were compared with those of AXP-processed CBUs without HES over an earlier six month period. TNC and CD45+ cell recoveries improved by 16 - 20% maintaining mean post-processing hematocrit at 30.6% (SD ± 2). CD34+ and CD45+ cell viabilities were unchanged: 99% (SD ± 0.7) and 96% (SD ± 2.7), respectively, while their mean recoveries were 95% (SD ± 18) and 94% (SD ± 6). In addition, the same consistent post-processing volume was obtained (mean 20.8 mL, SD ± 0.1). CFU - CD34+ correlation (R2) after processing with HES was 0.788 (not different than what was observed in the CBUs without HES). Six CBUs AXP-processed with HES, were thawed and tested, with very minor losses in cell count and viability, similar to results of thawed AXP-processed CBU without HES. Finally, HES addition did not result in microbial contamination in any of these AXP-processed CBUs. Conclusion. Adding HES to CBUs before automated AXP processing increased substantially the TNC and CD45+ recoveries without loss of viability, while the CD34+ recoveries remained basically unchanged, with a mean of 95%. The post-processing hematocrit was consistent and low. AXP-automated CB processing with HES addition can be performed in the GMP environment, results in higher post-processing TNC and therefore, increases the CB bank’s ability to store larger CBUs that are most useful to patients. Disclosures No relevant conflicts of interest to declare.

scholarly journals 412 Development of Pre- & Post-processing System for 3D-First Order Analysis

2007 ◽  
Vol 2007.44 (0) ◽  
pp. 153-154
Author(s):  
Kenta ONOSHIMA ◽  
Koetu YAMAZAKI ◽  
Kazuhiko HIROOKA
Keyword(s):  
Processing System ◽  
Post Processing ◽  
Order Analysis ◽  
First Order
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