scholarly journals Development and Certification of A Visibility-Range Monitor By Image Processing

1989 ◽  
Vol 13 ◽  
pp. 117-119
Author(s):  
Keishi Ishimoto ◽  
Masao Takeuchi ◽  
Shigeyuki Naitou ◽  
Haruki Furusawa
Keyword(s):  
Image Processing ◽  
Vertical Distribution ◽  
Video Camera ◽  
Measuring System ◽  
Blowing Snow ◽  
Snow Surface ◽  
Charge Coupled Device ◽  
Visibility Range ◽  
A Charge ◽  
The Vertical Distribution

A new visibility-range measuring system has been developed which uses a video camera, and with which visibility can be estimated by measuring the brightness contrast of a black target against a standardized background. This principle has been applied to development of the new visibility-range monitor described in this paper. In this monitor, a charge-coupled device (CCD) video camera measures the brightness of an arbitrary area in its range of vision, and visibility range measured by the video camera in blowing snow can be compared with that measured by the transmissometer-type visibility-range monitor and can also be calculated by direct observation using optical targets.The new sytem can monitor visibility and record information about traffic on highways at 1 s intervals for a maximum of six separate positions. The vertical distribution of visibilities over a snow surface has been observed, and it has been found that the fluctuation in visibility is greatest at lower levels above the ground in blowing snow.

scholarly journals Development and Certification of A Visibility-Range Monitor By Image Processing

1989 ◽  
Vol 13 ◽  
pp. 117-119
Author(s):  
Keishi Ishimoto ◽  
Masao Takeuchi ◽  
Shigeyuki Naitou ◽  
Haruki Furusawa
Keyword(s):  
Image Processing ◽  
Vertical Distribution ◽  
Video Camera ◽  
Measuring System ◽  
Blowing Snow ◽  
Snow Surface ◽  
Charge Coupled Device ◽  
Visibility Range ◽  
A Charge ◽  
The Vertical Distribution

A new visibility-range measuring system has been developed which uses a video camera, and with which visibility can be estimated by measuring the brightness contrast of a black target against a standardized background. This principle has been applied to development of the new visibility-range monitor described in this paper. In this monitor, a charge-coupled device (CCD) video camera measures the brightness of an arbitrary area in its range of vision, and visibility range measured by the video camera in blowing snow can be compared with that measured by the transmissometer-type visibility-range monitor and can also be calculated by direct observation using optical targets. The new sytem can monitor visibility and record information about traffic on highways at 1 s intervals for a maximum of six separate positions. The vertical distribution of visibilities over a snow surface has been observed, and it has been found that the fluctuation in visibility is greatest at lower levels above the ground in blowing snow.

Real-time lock-in imaging by a newly developed high-speed image-processing charge coupled device video camera

2003 ◽  
Vol 74 (3) ◽  
pp. 1393-1396 ◽  
Author(s):  
Kentarou Nishikata ◽  
Yoshihide Kimura ◽  
Yoshizo Takai ◽  
Takashi Ikuta ◽  
Ryuichi Shimizu
Keyword(s):  
Image Processing ◽  
Real Time ◽  
High Speed ◽  
Video Camera ◽  
Charge Coupled Device ◽  
Lock In ◽  
High Speed Image Processing

Research on Magnet Excitation and Image Processing Used in Visual Detection

2011 ◽  
Vol 216 ◽  
pp. 793-797
Author(s):  
Li Bing Bai ◽  
Shu Lin Tian ◽  
Yu Hua Cheng
Keyword(s):  
Image Processing ◽  
Eddy Current ◽  
Visual Detection ◽  
Polarized Light ◽  
Ccd Camera ◽  
Experimental Tests ◽  
Laser Source ◽  
Magnetic Excitation ◽  
Charge Coupled Device ◽  
A Charge

A novel visual detection set, which can detect sub-superficial defects in conductive specimens, is presented in this paper. The set has a laser source, a charge coupled device (CCD) camera, and a magnetic excitation. The linear polarized light given off by the laser source is modulated by the superimposition of the magnetic fields induced by the coil and eddy current, and acquired by the CCD. Given the exciting current is known and the eddy current is influenced by the defects, the information of defects can be extracted from the image acquired by CCD. The magnet excitation and image processing are described in detail. Experimental tests have been done and the method presented is proved by the experimental results.

Using laser speckle to measure the roughness of paper

TAPPI Journal ◽  
2011 ◽  
Vol 10 (3) ◽  
pp. 7-13
Author(s):  
ABDIEL PINO ◽  
JOSEP PLADELLORENS ◽  
JOSEP F. COLOM ◽  
ORIOL CUSOLA ◽  
AGUSTÍN TOSAS
Keyword(s):  
Image Processing ◽  
Speckle Pattern ◽  
Ccd Camera ◽  
Laser Speckle ◽  
Charge Coupled Device ◽  
Paper Surface ◽  
Surface Profiling ◽  
Base Paper ◽  
Occurrence Matrix ◽  
A Charge

Paper surface roughness is an important consideration in paper and board destined for printing. The amount of coating and method of application depend on the roughness of the base paper. We present a method to measure the roughness of the paper based on analysis of speckle pattern on the surface. Images are captured by means of a simple configuration using a laser and a charge-coupled device (CCD) camera. Then, we apply digital image processing using a co-occurrence matrix, providing for a noncontact surface profiling method that can be used online.

Use of a CCD-Based Area Detection System on a Fibre Diffractometer

1994 ◽  
Vol 38 ◽  
pp. 503-510 ◽  
Author(s):  
S. Hanna ◽  
A.H. Windle
Keyword(s):  
Detection System ◽  
Single Point ◽  
Video Camera ◽  
Reciprocal Space ◽  
Charge Coupled Device ◽  
X Ray ◽  
Complete Section ◽  
Ewald Sphere ◽  
Pros And Cons ◽  
A Charge

Abstract We describe a new X-ray fibre diffractometer, consisting of a commercial X-ray sensitive video camera coupled to a conventional 3-circle goniometer in place of a more traditional single-point detector. The active element of the video camera is a charge-coupled device (CCD). Diffraction images, obtained at various goniometer settings, are transformed into reciprocal space, and combined to give a complete section through the origin and parallel to the symmetry axis of cyiindrically averaged reciprocal space. A greater density of measurements is needed in the vicinity of the reciprocal fibre axis in order to avoid information loss due to the curvature of the Ewald sphere. The pros and cons of using CCD's as X-ray detectors are discussed and sample results from polymer fibres are shown.

scholarly journals Video Techniques for Observation of the Leonid Storms

1998 ◽  
Vol 11 (2) ◽  
pp. 1017-1019 ◽  
Author(s):  
R.L. Hawkes
Keyword(s):  
Spatial Resolution ◽  
Temporal Resolution ◽  
Image Intensifier ◽  
High Sensitivity ◽  
Video Camera ◽  
Third Generation ◽  
Charge Coupled Device ◽  
A Charge ◽  
Video Detector ◽  
Current Systems

Video techniques, which provide high sensitivity, portability, moderate spatial resolution and excellent temporal resolution promise to be one of the most valuable methods for study of the forthcoming Leonid storm(s). While an unintensified video camera will detect very bright meteors (typically about 0 magnitude), some sort of image intensifier is needed to attain high meteor rates. Most current systems use a second or third generation microchannel plate (MCP) image intensifier lens or fibre-optically coupled to a charge coupled device (CCD) video detector.

scholarly journals Diagnostic Evaluation of Pancreatic Carcinoma and Chronic Pancreatitis by Pancreatoscopy

1997 ◽  
Vol 3 (3) ◽  
pp. 177-182 ◽  
Author(s):  
Hisao Tajiri
Keyword(s):  
Image Processing ◽  
Pancreatic Cancer ◽  
Chronic Pancreatitis ◽  
Pancreatic Carcinoma ◽  
Pancreatic Duct ◽  
Diagnostic Ability ◽  
Charge Coupled Device ◽  
Adaptive Enhancement ◽  
A Charge ◽  
Better Than

We succeeded in viewing the image of pancreatic duct on a TV monitor as a sequential electronic endoscope image by connecting a converter with a charge-coupled device to an ultra-thin pancreatoscope. Spacial image processing by adaptive enhancement, using an electronic endoscope, was studied in the pancreatoscope images of 18 cases (10 with pancreatic cancer and 8 with chronic pancreatitis). As a result, it became clear that the images obtained in Peak 2 of adaptive enhancement are much better than the original images. There was an excellent effect of clearly detecting the characteristic mucosal patterns in pancreatic cancer and chronic pancreatitis. We are convinced that this method would be very useful in improving the diagnostic ability of pancreatic cancer using an ultra-thin pancreatoscope.

Surface Roughness Measuring System Design for Cutting Workpiece Based on Machine Vision Technology

2011 ◽  
Vol 128-129 ◽  
pp. 434-438
Author(s):  
Ming Zhu ◽  
Qi Yong Zeng ◽  
Kai Wu ◽  
Tao Hong ◽  
Xiao Feng Zheng
Keyword(s):  
Surface Roughness ◽  
Machine Vision ◽  
Ccd Camera ◽  
Measuring System ◽  
Charge Coupled Device ◽  
Workpiece Surface ◽  
Surface Image ◽  
Processing Module ◽  
Image Characteristic ◽  
A Charge

A new method for workpiece surface roughness measuring system based on machine vision technology was designed. A Charge-coupled Device （CCD） camera was used to take workpiece surface image. Then median filtering, image enhancement and image binarization techniques were used for image preprocessing. And then useful information was extracted from image characteristic parameters. The surface roughness of cutting workpiece was calculated out. Researching emphasis was focused on the hardware design and software programming of the main two parts, image acquisition module and image processing module. This measuring system was used to measure cutting workpiece surface roughness, and perform very well.

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