Results 281 to 290 of about 278,785 (319)

Camera calibration and lens distortion correction for binocular linear CCD

, 2014
Zhu Hon
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Differential Image Distortion Correction

Microscopy and Microanalysis, 2001
AbstractImaging techniques often suffer from distortion effects. Former methods of reducing these distortions have been based either on improving the imaging technique (i.e., to avoid distortions) or on the use of reference samples (i.e., to determine the distortion field by imaging of a known structure.
C., Pollak, T., Stubbings, H., Hutter
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Direct distortion prediction method for AR-HUD dynamic distortion correction

Applied Optics, 2023
Dynamic distortion is one of the most critical factors affecting the experience of automotive augmented reality head-up displays (AR-HUDs). A wide range of views and the extensive display area result in extraordinarily complex distortions.
Fangzheng Yu, Nan Xu, Shiqi Chen, Huajun Feng, Zhihai Xu, Qi Li, Tingting Jiang, Yueting Chen   +7 more
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Distortion Correction for an Imaging Ellipsometer

The Journal of Physical Chemistry A, 2020
A simple imaging add-on utilizing the combination of a relay lens and an optical grating to a nulling ellipsometer for the purpose of imaging and correcting angular distortion is designed, built, and tested. Image contrast is achieved on a standardized silicon wafer, graphene transferred on silicon wafer, a self-assembled monolayer of 1-octadecanethiol
Thong Q. Ly, Steven Baldelli
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Rolling shutter distortion correction

SPIE Proceedings, 2005
As opposed to the global shutter, which starts and stops the light integration of each pixel at the same time by incorporating a sample-and-hold switch with analog storage in each pixel, the electronic rolling shutter found in most low-end CMOS image sensors today collects the image data row by row, analogous to an open slit that scans over the ...
Chia-Kai Liang, Yu-Chun Peng, Homer Chen
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Nonparametric correction of distortion

Proceedings Third IEEE Workshop on Applications of Computer Vision. WACV'96, 2002
Images taken with wide angle and inexpensive medium angle lenses show substantial distortion, which will cause many computer vision applications to malfunction. Parametric calibration algorithms cannot handle the wide range of possible distortion functions and they require a known image center, expensive equipment, and/or estimation of unneeded ...
D.E. Stevenson, M.M. Fleck
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Correcting spatial distortion in histological images

Computerized Medical Imaging and Graphics, 2005
We described an interactive method for correcting spatial distortion in histology samples, applied them to a large set of image data, and quantitatively evaluated the quality of the corrections. We demonstrated registration of histology samples to photographs of macroscopic tissue samples and to MR images.
Michael S, Breen, Tanya L, Lancaster, David L, Wilson   +2 more
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Scanning distortion correction in STEM images

Ultramicroscopy, 2018
Various disturbances do exist in the image taking process of scanning transmission electron microscopes (STEM), which seriously reduces the resolution and accuracy of STEM images. In this paper, a deep understanding of the scanning distortion influence on the real and reciprocal spaces of STEM images is achieved via theoretical modeling and simulation.
Ning, Shoucong MAE, Fujita, Takeshi, Nie, Anmin, Wang, Ziqian, Xu, Xiandong, Chen, Jianghua, Chen, Mingwei, Yao, Shuhuai, Zhang, Tong-Yi   +8 more
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Image intensifier distortion correction

Medical Physics, 1987
A method is described for determining and correcting the spatial distortion affecting images acquired with image‐intensified video systems. The distortion is separated into two physically distinct components, a predominant one originating from the projection of the x‐ray image onto the curved input phosphor, and a smaller component corresponding to the
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Correction of distortion in endoscope images

IEEE Transactions on Medical Imaging, 1992
Images formed with endoscopes suffer from a spatial distortion due to the wide-angle nature of the endoscope's objective lens. This change in the size of objects with position precludes quantitative measurement of the area of the objects, which is important in endoscopy for accurately measuring ulcer and lesion sizes over time.
W E, Smith, N, Vakil, S A, Maislin
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