The proceedings contains 138 papers from the 1993 IEEE International conference on Acoustic and Speech Signal processing. The topics covered include: acoustic wave propagation and transmission, sonar beamforming, acou...
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The proceedings contains 138 papers from the 1993 IEEE International conference on Acoustic and Speech Signal processing. The topics covered include: acoustic wave propagation and transmission, sonar beamforming, acoustic arrays, interference suppression, acoustic imaging, digital signal processing, speech segmentation, radar imaging, digital filters, phoneme recognition, signal decoding and encoding, motion estimation, dynamic programming, neural network applications, learning systems, imageprocessing, object recognition, system identification, Markov models, radar tracking, adaptive algorithms and signal localization.
Colposcopy is a diagnostic method used to detect cancer precursors and cancer of the uterine cervix. Computer-Aided-Diagnosis (CAD) for colposcopy is a new field in medical imageprocessing. Colposcopists analyze glar...
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ISBN:
(纸本)0819457213
Colposcopy is a diagnostic method used to detect cancer precursors and cancer of the uterine cervix. Computer-Aided-Diagnosis (CAD) for colposcopy is a new field in medical imageprocessing. Colposcopists analyze glare (glint or specular reflection) patterns on the cervix to assess the surface contour (3D topology) of lesions, an important feature used to evaluate lesion severity. However, glare in the imagery presents major problems for automated image analysis systems. Glare eliminates all information in affected pixels and can introduce artifacts in feature extraction algorithms, such as acetowhite region detection. Although cross-polarization filters can be used to eliminate glare, the reality is that we have to deal with glare when we want to use existing cervical image databases or use an instrument that does not provide cross-polarized imagery. Here., we present the details and preliminary results of a glare removal algorithm for RGB color images of the cervix that can be used as a pre-processing step in CAD systems. The algorithm can be extended to multispectral and hyperspectral imagery. The basic approach of the algorithm is to extract a feature image from the RGB image that provides a good glare to background ratio, to detect the glare regions in the feature image, to extend the glare regions to cover all pixels that have been affected by the glare. and to remove the glare in the affected regions by filling in an estimate of the underlying image features. In our current implementation we use the green (G) image component as the feature image, given its high glare to background ratio and simplicity of calculation. Glare regions are either detected as saturated regions or small high contrasted bright regions. Saturated regions are detected using an adaptive thresholding method. Small high contrasted bright regions are detected using morphological top hat filters with different sizes and thresholds. The full extent of the glare regions is estimated by using
In the process of acceptance measurement based on drone point cloud data, the mining cars in the open-pit mining area will generate a large number of pseudo terrain points in the 3D point cloud modeling process. If th...
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Due to FPGA's flexibility and parallelism, it is popular for accelerating imageprocessing. In this paper, a double-parallel architecture based on FPGA has been exploited to speed up median filter and edge detecti...
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This article, a morphological imageprocessing algorithm is developed for early detection of viral hepatitis from microscopic blood images. It is mentioned that it can be used to accurately determine each boundary det...
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The digital image watermarking technology is widely used to protect intellectual property and to authenticate digital contents in the network environment. The aim of the paper is to invoke the improved Laplacian Pyram...
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This paper is devoted to subjective/objective evaluation on medical image quality. A model based on neural network is proposed to mimic radiology doctors' perception. Medical images were compressed by different al...
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A flat panel stereoscopic display has been developed and tested for application in unmanned ground systems. The flat panel display has a footprint that is only slightly thicker than the same size LCD display and has b...
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ISBN:
(纸本)9780819475985
A flat panel stereoscopic display has been developed and tested for application in unmanned ground systems. The flat panel display has a footprint that is only slightly thicker than the same size LCD display and has been installed in the lid of a TALON OCU. The approach uses stacked LCD displays and produces live stereo video with passive polarized glasses but no spatial or temporal multiplexing. The analog display, which is available in sizes from 6.4" diagonal to 17" diagonal, produces 640 x 480 stereo imagery. A comparison of soldiers' performance using 3D vs. 2D using live stereo video will be given. A description of the display will be given along with discussion of the testing.
One-dimensional nano CD (NCD) linewidth standard product lines are prepared using multilayer thin films deposition technique. The Ti/SiO2 multilayer thin films are systematically deposited on silicon substrates in the...
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We have developed an eye-position tracking stereoscopic projector which employs image shifting optics. The display allows 3D images to be viewed without special glasses from any position along a lateral axis. Its imag...
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ISBN:
(纸本)0819420271
We have developed an eye-position tracking stereoscopic projector which employs image shifting optics. The display allows 3D images to be viewed without special glasses from any position along a lateral axis. Its image shifting device contains a plane parallel glass plate and is installed in a liquid crystal projector. Refraction produced by inclination of the glass plate shifts the optical axis of the projected image. Since the only moving part in the optics is the lightweight glass plate, the response of the image shifting device is both fast and precise enough for interactive 3D-CAD and virtual reality applications. To improve the system's interactive response, we have widened the stereoscopic viewing area by adding a device which causes the image to vibrate laterally. Also we use a new tracking algorithm which reduces the tracking error that would ordinarily be created by delay time. Experimental results confirm the success of these improvements.
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