We present a fast and high quality scanning system based on structured light. The technique is based on spatial neighborhood coding which has only a single pattern and can be applied on moving surfaces. A color grid p...
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ISBN:
(纸本)9781424409822
We present a fast and high quality scanning system based on structured light. The technique is based on spatial neighborhood coding which has only a single pattern and can be applied on moving surfaces. A color grid pattern based upon De Bruijn sequences has been generated and applied, This system also uses a Back Propagation Neural Network for color correction. Experimental results using a prototype system with a camera and a lighting projector show that the proposed scheme is effective and efficient in solving the correspondence problem, even in discontinuous and blurred areas.
We present a novel fast microscopic method to analyze the crystal structures of air-dried or suspended colloidal multilayer systems. Once typical lattice spacings of such films are in the range of visible light, chara...
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We present a novel fast microscopic method to analyze the crystal structures of air-dried or suspended colloidal multilayer systems. Once typical lattice spacings of such films are in the range of visible light, characteristic Bragg scattering patterns are observed. If in microscopic observations these are excluded from image construction, a unique color coding for regions of different structures, morphologies, and layer numbers results. Incoherently scattering defect structures, however, may not be excluded from image construction and thus remain visible with high resolution.
Set Partitioned Embedded bloCK coder (SPECK) has been found to perform comparable to the best-known still grayscale image coders like EZW, SPIHT, JPEG2000 etc. In this paper, we first propose color-SPECK (CSPECK), a n...
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ISBN:
(纸本)0819452114
Set Partitioned Embedded bloCK coder (SPECK) has been found to perform comparable to the best-known still grayscale image coders like EZW, SPIHT, JPEG2000 etc. In this paper, we first propose color-SPECK (CSPECK), a natural extension of SPECK to handle color still images in the YUV 4:2:0 format. Extensions to other YUV formats are also possible. PSNR results indicate that CSPECK is among the best known color coders while the perceptual quality of reconstruction is superior than SPIHT and JPEG2000. We then propose a moving picture based coding system called Motion-SPECK with CSPECK as the core algorithm in an intra-based setting. Specifically we demonstrate two modes of operation of Motion-SPECK, namely the constant-rate mode where every frame is coded at the same bit-rate and the constant-distortion mode, where we ensure the same quality for each frame. Results on well-known CIF sequences indicate that Motion-SPECK performs comparable to Motion-JPEG2000 while the visual quality of the sequence is in general superior. Both CSPECK and Motion-SPECK automatically inherit all the desirable features of SPECK such as embeddedness, low computational complexity, highly efficient performance, fast decoding and low dynamic memory requirements. The intended applications of Motion-SPECK would be high-end and emerging video applications such as High Quality Digital Video Recording System, Internet Video, Medical Imaging etc.
This report surveys cognitive aspects of color in terms of behavioral, neuropsychological, and neurophysiological data. color is usually defined as a color stimulus or as perceived color. In this article, a definition...
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This report surveys cognitive aspects of color in terms of behavioral, neuropsychological, and neurophysiological data. color is usually defined as a color stimulus or as perceived color. In this article, a definition of the concept of cognitive color is formulated. To elucidate this concept, those visual tasks are described where it is relevant: in color categorization, color coding, color naming, the Stroop effect, spatial organization of colored visual objects, visual search, and color memory. (C) 2003 Wiley Periodicals, Inc.
The HQSAR (Holographic QSAR) method, which has been recently developed, can offer the ability to rapidly and easily generate QSAR models of high statistical quality and predictive value. HQSAR analysis requires select...
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The HQSAR (Holographic QSAR) method, which has been recently developed, can offer the ability to rapidly and easily generate QSAR models of high statistical quality and predictive value. HQSAR analysis requires selecting values for parameters that specify the size of the hologram that is to be used, and the size and type of fragment substructures that are to be encoded. The color coding is provided by HQSAR to reflect which molecular fragments may be important contributors to the biological activity. In this work, we studied the quantitative structure activity relationship of selected esters using the HQSAR method. A robust HQSAR model with r(2) (non-cross-validated regression coefficient) of 0.981 and q(2) (cross-validated regression coefficient) of 0.912, was developed after optimizing the fragment size and the hologram length. The color coding analysis, which has rarely been reported before, was done here to explain the outlier successfully. (C) 2004 Elsevier Ltd. All rights reserved.
We present CARTscans, a graphical tool that displays predicted values across. a four-dimensional subspace. We show how these plots are useful for understanding the structure and relationships between variables in a wi...
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We present CARTscans, a graphical tool that displays predicted values across. a four-dimensional subspace. We show how these plots are useful for understanding the structure and relationships between variables in a wide variety of models. including (but not limited to) regression trees, ensembles of trees, and linear regressions with varving degrees of interactions. In addition, the common visualization framework allows diverse complex models to be visually compared in a way that illuminates the similarities and differences in the underlying methods, facilitates the choice of a particular model structure, and provided a useful check for implausible predictions of future observations in regions With little or no data.
In the past we have examined the luminance contrast ratios required to maintain color recognition in helmet-mounted displays (HMDs). Using typical daytime viewing conditions as simulated backgrounds we were able to de...
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ISBN:
(纸本)081945365X
In the past we have examined the luminance contrast ratios required to maintain color recognition in helmet-mounted displays (HMDs). Using typical daytime viewing conditions as simulated backgrounds we were able to determine 95% correct color recognition thresholds resulting in luminance contrast ratios averaging 1.17:1. Last year we adapted this research to determine the best colors to maintain color recognition of symbology that is on a night vision goggle (NVG) image. We simulated NVG P43 green phosphor and determined 95% correct color recognition thresholds. Results indicated that, on average, a luminance contrast ratio of nearly 1.5:1 was required to maintain color recognition. Review of the studies indicated that our simulated P43 phosphor was a much more saturated background, so saturation contrast may play as important a role as luminance contrast. A P45 white phosphor NVG may therefore be less problematic. Here we investigate the effects of both luminance and saturation contrast by manipulating color mixtures of green, yellow, and red symbology against two different backgrounds, P43 green and P45 white. We discuss our results in terms of both luminance and saturation contrast required for the maintenance of color recognition in NVGs.
Recent advances in display technology have made it possible to superimpose color-coded symbology on the images produced by night vision goggles (NVGs). The resulting color mixture shifts the symbology's hue and sa...
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ISBN:
(纸本)0819449385
Recent advances in display technology have made it possible to superimpose color-coded symbology on the images produced by night vision goggles (NVGs). The resulting color mixture shifts the symbology's hue and saturation, which can impede recognition of the color code. We are developing, luminance-contrast specifications for color-coded NVG symbology to ensure accurate color recognition.
Given a parametric LTI system, the set of parameters for which all roots lie in a prescribed region Γ in the complex plane can be determined. In a similar fashion conditions for the Nyquist plane, e.g. the Nyquist st...
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Given a parametric LTI system, the set of parameters for which all roots lie in a prescribed region Γ in the complex plane can be determined. In a similar fashion conditions for the Nyquist plane, e.g. the Nyquist stability margin, can be mapped into the parameter plane. We present a method which allows representation of objectives from both the eigenvalue and Nyquist plane. To this end, frequency domain specifications are color coded. This enables simultaneous consideration of eigenvalue and frequency domain specifications. Both numerical and symbolical computation of the color coded regions is used. The proposed method is applied to design a controller for a track-guided bus with uncertain mass and velocity.
A framework for accounting for emotional phenomena proposed by Sokolov and Boucsein (2000) employs conceptual dimensions that parallel those of hue, brightness, and saturation in color vision. The approach that employ...
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A framework for accounting for emotional phenomena proposed by Sokolov and Boucsein (2000) employs conceptual dimensions that parallel those of hue, brightness, and saturation in color vision. The approach that employs the concepts of emotional quality, intensity, and saturation has been supported by psychophysical emotional scaling data gathered from a few trained observers. We report cortical evoked potential data obtained during the change between different emotions expressed in schematic faces. Twenty-five subjects (13 male, 12 female) were presented with a positive, a negative, and a neutral computer-generated face with random interstimulus intervals in a within-subjects design, together with four meaningful and four meaningless control stimuli made up from the same elements. Frontal, central, parietal, and temporal ERPs were recorded from each hemisphere. Statistically significant outcomes in the P300 and N200 range support the potential fruitfulness of the proposed color-vision-model-based approach to human emotional space.
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