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低对比度
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  low contrast
    This thesis designed and realized a track-following system cored with 8bit mcu p89c51rd2. In the system, the wavelet transform theory is put forward to study track-following of autonomic mobile vehicle in low contrast surroundings.
    本设计实现了以8位微处理器P89C51RD2为核心的轨迹跟踪系统,在系统中引入了小波分析理论,对自主式移动机器人小车在低对比度环境下的轨迹跟踪问题进行了研究。
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    The technique has a large practical value for the detection of the signal with low contrast when SSPA device is applied.
    该技术在用 SSPA器件对低对比度信号的检测中有很大实用价值。
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    Based on cross correlation coefficient and absolute difference algorithms and the principle of Hartmann Shack wavefront sensor, the feasibility of correlating Hartmann Shack wavefront sensor used for low contrast and extended object is studied according to the indoors solar granulation simulator.
    基于互相关因子和绝对差分算法以及哈特曼夏克波前传感器的基本原理 ,根据室内模拟太阳米粒结构研究了低对比度扩展目标情况下应用相关哈特曼夏克波前传感器探测波前误差的可行性。
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    We do computer simulating experiments with two classes of low contrast infrared image (these images have two opposite direction-left and right), and get better results of recognition.
    用两类方向相反 (左向和右向 )的低对比度红外坦克图像进行计算机仿真实验 ,取得了较好的识别结果。
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    The average operation time of DSP is 2ms with one primary window size 230×200, 0.4ms with three secondary windows size 60×60 respectively. Under the tanglesome background, prompt tracking the targets of low contrast is achieved.
    一个320×160主窗口的DSP平均处理时间为2ms,三个60×60副窗口的DSP平均处理时间各为0.4ms,实现了复杂背景下低对比度目标的快速跟踪.
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  “低对比度”译为未确定词的双语例句
    Traditional method can be classified two class: linear optimization technique and nonlinear optimization technique, linear optimization technique base on Born approximation or Rytov approximation is usually used to solve weak scattering problem.
    线性优化方法采用线性近似忽略了散射体内部的多次散射,可以有效的反演低对比度的问题,但对于高对比度问题的求解则有可能不收敛。 非线性优化问题,直接求解非线性方程组,可以反演高对比度问题,但是要迭代多次,在每次的求解过程中都需要对剖面导数进行求解,比较费时。
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    The result of the algorithm demonstrates that the algorithm avoids over-enhancement of noise while enhancing contrast of the image with good visual effect.
    增强低频子带图像的对比度以保证整体的增强效果。 结果表明,该方法能有效地增强低对比度图像,减小了噪声的增强幅度,使得到的船舶图像具有很好的视觉效果。
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    Phase-based optimal image thresholding can deal with poor contrast, high noise to signal ratio, complex patterns, and variable modalities in the gray-scale histograms, and it can obtain very good result.
    该方法能够很好的处理低对比度,高信噪比,内容复杂以及多种形状的灰度直方图的图像。
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    Firstly, a new adaptive image enhancement approach based on the theory of wavelet is brought forward. In this approach, wavelet coefficients are enhanced by different strategies according to scale correlation.
    首先,在对含噪低对比度气液两相图像非线性滤波消噪后,根据小波变换后图像信号系数和噪声系数在相邻尺度上的相关性不同提出一种自适应图像增强算法,即依据相邻尺度间小波系数相关性的程度相应地对小波系数采取不同的增强策略。
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    The calibration improves the quality of projection. The artifacts are cut down in reconstruction image.
    通过校正,重建图像中的上述伪影明显减少,图像质量得到改善,且系统的低对比度探测能力也得到相应提高。
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  low contrast
Experimental results show that the approach, compared with traditional methods for resolving the SAR PRF ambiguity, is more suitable for both high contrast scenes such as urban areas and low contrast scenes such as mountains.
      
This method however has the disadvantage of low contrast of the cross-sectional pictures of an object.
      
The algorithm is based on the well-known seeded region growing method (SGR), is robust to noise, and can handle low contrast images.
      
Then image matching, based on the maximum correlation coefficient, is performed between registered images after the low contrast areas have been removed.
      
The Clausius-Mossotti approximation results are found to provide a good description of the results of the simulations in cases of low contrast between the two components in the networks.
      
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This paper deals with an image segmenting method based on multiple image informa-tion,Depending on the multiple image information of each pixel,a pixel is classified as ob-ject or background with the Bayes criterion. Two separate classifiers are provided for singleimage and dynamic image series,respectively.The real-time hardware design is given,Themethod proposed can be used for the segmentation of image series,low contrast images andother images difficult to segment by only one type of image information;The...

This paper deals with an image segmenting method based on multiple image informa-tion,Depending on the multiple image information of each pixel,a pixel is classified as ob-ject or background with the Bayes criterion. Two separate classifiers are provided for singleimage and dynamic image series,respectively.The real-time hardware design is given,Themethod proposed can be used for the segmentation of image series,low contrast images andother images difficult to segment by only one type of image information;The effectiveness ofthe method has been verified by experiment.

提出一种基于多图像信息的图像分割方法,利用Bayes分类准则,根据每个像素的多图像信息向量将其分为目标或背景,并对动态图像组成的图像序列或静态图像的分割给出了不同的像素分类准则,同时给出了硬件实时实现的原理,该方法适用于图像序列、低对比度图像和其它难于用一种图像信息分割的图像。实验证明了该方法的有效性。

The cause for generating nonuniform characteristics of SSPA image sensor array is investigated based on introduction of its basic operating principle, and the correcting method is given. The technique has a large practical value for the detection of the signal with low contrast when SSPA device is applied.

介绍 SSPA图象传感器阵列的基本工作原理 ,在此基础上主要探讨其不均匀性特性形成的原因 ,并且给出了校正方法。该技术在用 SSPA器件对低对比度信号的检测中有很大实用价值。

It exists anisoplanatism error in low~order correction adaptive optical system. Based on the Zernike decomposition of wavefront distortion, the anisoplanatism error and the wavefront residual error of the low-order correction adaptive optical system for extend object are deduced theoretically in this paper. The numerical results of tip-tilt correction adaptive optical system for light wave horizontal propagation through atmospheric turbulence are presented. Furthermore, the experimental results for solar granulation,...

It exists anisoplanatism error in low~order correction adaptive optical system. Based on the Zernike decomposition of wavefront distortion, the anisoplanatism error and the wavefront residual error of the low-order correction adaptive optical system for extend object are deduced theoretically in this paper. The numerical results of tip-tilt correction adaptive optical system for light wave horizontal propagation through atmospheric turbulence are presented. Furthermore, the experimental results for solar granulation, low-contrast extended object, are given.

当自适应光学系统对扩展目标进行低阶模式校正时,系统存在非等晕误差.本文应用大气湍流波前扰动的 Zernike多项式分解。推导了扩展目标情况下低阶校正自适应光学系统的模式非等晕误差和波前校正残余误差的关系表达式.在此基础上给出了光波水平大气传输时倾斜校正自适应光学系统波前残余误差的数值计算结果.此外还给出了太阳表面米粒结构低对比度扩展目标倾斜校正后的补偿成像实验结果.

 
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