Aerostatic moving stage positioning compensation using a numerical algorithm combined with an image acquisition method

2019 ◽  
Vol 104 (1-4) ◽  
pp. 1203-1210
Author(s):  
Ming-Fei Chen ◽  
Pei-Hao Wang ◽  
Wen-Tse Hsiao
Keyword(s):  
Numerical Algorithm ◽  
Image Acquisition ◽  
Acquisition Method

scholarly journals The Method of Automatic Knuckle Image Acquisition for Continuous Verification Systems

Symmetry ◽  
2018 ◽  
Vol 10 (11) ◽  
pp. 624
Author(s):  
Rafal Doroz
Keyword(s):  
Pattern Recognition ◽  
Image Acquisition ◽  
Test Results ◽  
High Effectiveness ◽  
Camera Image ◽  
Automatic Location ◽  
Pattern Recognition Approach ◽  
Computer Keyboard ◽  
Verification Systems ◽  
Acquisition Method

The paper proposes a method of automatic knuckle image acquisition for continuous verification systems. The developed acquisition method is dedicated for verification systems in which the person being verified uses a computer keyboard. This manner of acquisition enables registration of the knuckle image without interrupting the user’s work for the time of acquisition. This is an important advantage, unprecedented in the currently known methods. The process of the automatic location of the finger knuckle can be considered as a pattern recognition approach and is based on the analysis of symmetry and similarity between the reference knuckle patterns and live camera image. The effectiveness of the aforesaid approach has been tested experimentally. The test results confirmed its high effectiveness. The effectiveness of the proposed method was also determined in a case where it is a part of a multi-biometric method.

An Iris Image Acquisition Method Based on Embedded System

2013 ◽  
Vol 313-314 ◽  
pp. 1197-1200
Author(s):  
Qi Jian Sun ◽  
Zheng Ma
Keyword(s):  
Embedded System ◽  
Traditional Method ◽  
Quality Evaluation ◽  
Control Function ◽  
Image Acquisition ◽  
High Quality ◽  
Iris Image ◽  
Acquisition Speed ◽  
Pass Through ◽  
Acquisition Method

Capturing an iris image rapidly is required for iris image acquisition embedded system. For the traditional method, an iris image must firstly pass through the quality evaluation, which is complex, so the acquisition speed is very slow. This paper described an iris acquisition embedded system, and a new capturing method. The system includes an DSP DM642, and some relevant peripherals. When an image is acquired, it is filtered by the capture-control function, if passed then be stored the image, until capturing the assigned amount. Using this method, we can rapidly capture the high quality iris images at about 0.8s, and 83% of the stored images can be used for the next procedure. At the same time, it is convenient for the user to capture.

New automated iris image acquisition method

2005 ◽  
Vol 44 (5) ◽  
pp. 713 ◽  
Author(s):  
Kang Ryoung Park
Keyword(s):  
Image Acquisition ◽  
Iris Image ◽  
Acquisition Method

An evaluation on CT image acquisition method for medical VR applications

2017 ◽  
Author(s):  
Seong-wook Jang ◽  
Junho Ko ◽  
Yon-sik Yoo ◽  
Yoonsang Kim
Keyword(s):  
Image Acquisition ◽  
Ct Image ◽  
Acquisition Method

Digital Image Acquisition Method for Film Based Radiographic Testing

2004 ◽  
Author(s):  
Masako Mori ◽  
Tetsuo Taguchi ◽  
Mikio Takagi ◽  
Yoshimitsu Aoki
Keyword(s):  
Digital Image ◽  
Image Acquisition ◽  
Image Resolution ◽  
Pair Type ◽  
Line Pair ◽  
Current Image ◽  
Radiographic Testing ◽  
Film Images ◽  
Remote Inspection ◽  
Acquisition Method

Radiographic Test (RT) has been widely used in various industries to detect inner defects of weld structures and other significant components. In terms of digitization, although the ASME Boiler and Pressure Vessel Code Section V provides general outlines of digital image acquisition and processing of RT film, it is not widely implemented in industries as medical radiography instruments. One major reason for not being able to drive RT film digitization is that they cannot quantitatively guarantee each RT film and its digital image resolution directly. To solve these bottlenecks, the present paper proposes two things: 1) Line pair type penetrameter corresponding to current image quality indicators (IQIs) for both hole and wire type, which enables us to not only easily guarantee radiographic testing film resolution but also quantify digitalized RT film image resolution [1]; and 2) Line pair type standard film which is used for digitizing “existing RT film” with commonly used imaging scanners. Prototypes of line pair type penetrameters have been developed and prepared for various materials and verified for its applicability to RT digitalization. Also, prototypes of standard film are manufactured and verified that used with scanners, we can get RT film images of which resolution are quantitatively guaranteed. These two new RT film digitizing methodologies enable us to get “resolution guaranteed film images” and “digital inspection.” Furthermore, this will contribute to “remote inspection” where manufacturers, inspectors, customers and government inspectors can share the results of inspection in electronic format and timely confirm them from a remote place.

Image Acquisition Method Based on TMS320DM642

2013 ◽  
Vol 397-400 ◽  
pp. 2196-2199 ◽  
Author(s):  
Li Liu ◽  
Qing Hong Wu
Keyword(s):  
Digital Signal Processor ◽  
Image Acquisition ◽  
Digital Signal ◽  
Image Sensor ◽  
Programmable Logic ◽  
Practical Application ◽  
Logic Device ◽  
Complex Programmable Logic Device ◽  
Time Acquisition ◽  
Acquisition Method

A method of the image acquisition based on digital signal processor (DSP) is introduced. DSP, complex programmable logic device (CPLD) and contact image sensor (CIS) are combined in the hardware design, and the time-sequence analysis of the image acquisition process is also presented. Practical application indicates that this method has high accuracy and is rapid enough to satisfy the requirement of real-time acquisition.

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