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sfrmat is a Matlab function that provides a spatial frequency response* (SFR) from a digital image file containing a slanted-edge feature. The specific edge-gradient algorithm follows the intent of the standard ISO 12233, developed by Technical Commi
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根据)EF 特性中的对比度敏感度,
即空间频率特性曲线,对图像进行二维多级小波分解,由分解后的各小波分量,提取各频段相应的亮
度、清晰度和相关度指标;然后将这三个指标的几何平均与频段加权系数的内积做算术平均,以此作
为图像质量的综合评价指标-According to) EF characteristic of contrast sensitivity, that is spatial frequency characteristic curve, the image is two-d
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用于图像处理的matlab工具包,由Peter Kovesi制作,主要包含特征提取,各项异性滤波,灰度转换、图像去噪等,对图像处理的人来说非常有用。
-MATLAB and Octave Functions
for Computer Vision and Image Processing, including:
Feature Detection via Phase Congruency
Spatial Feature Detection
Integral Im
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Please run Demo_evaluation.m
This toolbox contains Matlab files that implement the image fusion criteria used in my paper
Qu Xiao-Bo, YAN Jing-Wen, XIAO Hong-Zhi, ZHU Zi-Qian. Image Fusion Algorithm Based on Spatial Frequency-Motivated P
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本实验要求使用强度变化方法对图像进行增强。图像增强的是要目标是处理图像,使其比原始图像更适用于特定应用,图像增强的方法分为两大类,空间域方法和频域方法,“空间域”一词是指图像平面本身,这类方法是以图像像素的直接处理。“频域”处理技术是以修改图像的傅里叶变换为基础的。本实验采用的对数变换和指数变换是对前一种方法的应用。-This experiment requires the use of intensity changes in methods of image enhancement. Ima
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该matlab代码是一个函数。它接受频域电磁场二维空间分布(用矩阵表示),包括幅度和相位,返回avi文件,显示二维电磁场的动画。-The code is a matlab function. It accepts frequency domain two-dimensional spatial distribution of electromagnetic field (with matrix), including the amplitude and phase, back avi files
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This document contains details about image enhancement techniques,spatial domain,frequency domain mathods.image stretching ,contrast slicing,sample codes , and some outputs are also included.
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基于Gabor变换的图像纹理识别。
提出了一种改进的Gabor变换的图像纹理增强算法,将空域的纹理图像变换到联合空间频率域并将联合空间
频率域的能量分布作为掌纹的特征,Gobar滤波器在频域内对子块其主方向上频率能量分布进行滤波,特征向量进行了匹配
识别,增强特征纹线信息并对核心区域进行多方向空间频率能量滤波合成,同时也对滤波算法进行了优化,有效地减少了运
算量。-Gabor transform based image texture recognition. An improv
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图像增强 灰度变换增强 空域滤波增强 频域增强 色彩增强 小波增强 -Enhanced gray-scale image enhancement transform spatial filter to enhance the frequency domain to enhance color enhanced wavelet enhanced
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The main goal of this work is to provide a unified theory of QSTBCs for four transmit antennas and
one (or more) receive antennas. The thesis consists of two main parts: In the first part we analyze the
QSTBCs transmission without any channel kno
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BACKPROJ uses the filtered or unfiltered backprojection algorithm to perform the inverse Radon transform. The filter is designed directly in the frequency domain and then multiplied by the FFT of the projections. The projections are zero-padded to a
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根据)EF 特性中的对比度敏感度,
即空间频率特性曲线,对图像进行二维多级小波分解,由分解后的各小波分量,提取各频段相应的亮
度、清晰度和相关度指标;然后将这三个指标的几何平均与频段加权系数的内积做算术平均,以此作
为图像质量的综合评价指标-According to) EF characteristic of contrast sensitivity, that is spatial frequency characteristic curve, the image is two-d
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图像质量的性能指标,设计标准差,熵,空间频率等指标-Image quality performance, the design standard deviation, entropy, spatial frequency and other indicators
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图像融合的目的把来自多传感器的数据互补信息合并成一幅新的图像,以改善图像的质量。图像融合最简单的理解就是两个(或多个)图像间的相加运算。这一技术广泛应用于多频谱图像理解和医学图像处理等领域。主要分为空域和频域相加。-The purpose of image fusion from multiple sensor data to complement the information merged into a new image to improve image quality. The simp
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这是用SIMULINK的S-FUNCTION方式编写的系统仿真代码,系统是基于4G网络的核心技术空时分组编码的MIMO-OFDM通信系统的,涉及到空间分集、时间分集和频率分集的有机结合,包括QPSK调制解调、IFFT调制、控制编解码、基于训练符号的信道估计等通信模块。包括main_STBC_MIMO_OFDM和training_symbol两个M文件和一个DOC文件,对各部分的都有详细的代码和注释。-It is used SIMULINK the S-FUNCTION approach to t
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小波变换在图像融合中的应用求出图片的均值,信噪比,空间频率,峰值信噪比等-The application of wavelet transform in image fusion, including to the application of wavelet transform in image fusion for the image of the mean, the signal-to-noise ratio, spatial frequency, the average peak sig
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图像处理算法在空间域和频域的简单滤波等方面的实现,实现了像霍夫变换和k均值算法的图像分割算法。(Image processing algorithm in the spatial domain and frequency domain of simple filtering and other aspects of the realization of the image segmentation algorithm such as Hough transform and k-means alg
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基于白光干涉的空间频域算法计算微观物体表面三维形貌(Spatial frequency domain algorithm)
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将理论知识、科学研究和工程实践有机结合起来,内容涉及数字图像处理和识别技术的方方面面,包括图像的点运算、几何变换、空域和频域滤波、小波变换、图像复原、形态学处理、图像分割以及图像特征提取的相关内容;同时对于机器视觉进行了前导性的探究,重点介绍了两种目前在工程技术领域非常流行的分类技术——人工神经网络(ANN)和支持向量机(SVM),并在人脸识别这样的热点问题中结束《精通Matlab数字图像处理与识别》。(Combining theoretical knowledge, scientific re
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图像融合中的平均梯度、相关系数、信息熵、交叉熵、联合熵、均方误差、互信息、信噪比、峰值信噪比、均方根误差、空间频率、标准差、均值、扭曲程度、偏差指数等等(Average gradient, correlation coefficient, information entropy, cross-entropy, joint entropy, mean square error, mutual information, signal-to-noise ratio, peak signal-to-no
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