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一个基于matlab的图像处理小例子,有dct压缩还原效果对比及dct和fft的频谱,A small matlab example of image processing, and to restore the effect of compression dct comparison of the fft and dct and spectrum
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This is the processing of images to be converted into 2D. from the original picture, it will be first converted to grayscale in the form, then do 2 Dimensional FFT on the image, then the image is done in 2D FFT on the result of changes filter.seluruh
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数字图像处理中的滤波和傅里叶压缩,包括理想低通滤波器,巴特沃茨高通滤波器,高斯带通滤波器,高斯带阻滤波器,FFT图像压缩。附原图像和处理后的图像截图。-Digital image processing in filtering and Fourier compression, including the design of an ideal low-pass filter, design Batewoci high-pass filter, bandpass filter design Gaus
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The frequency domain plays an important role in image
processing to smooth, enhance, and detect edges of images. Although
image data typically does not include imaginary values, the fast Fourier
transform (FFT) has been used for obtaining spect
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该gui函数基本上包括图像处理里面的最基本处理,相当于一个小型photoshop。比如读取文件,几何变换中的垂直镜像,平移,旋转,缩放;正交变换的DFT,FFT,DCT,DST,DHT,DWashT;灰度处理中的反色,直方图均衡,全局线性变换,分段线性变换,指数非线性变换,对数非线性变换;图像增强里面的加噪声,平滑,锐化,伪彩色增强;图像分割里面的灰度阈值法,Robert,Laplace,sobel,prewitt,canny算子边缘检测法;图像恢复里面的直接逆滤波,维纳滤波;图像编码里面的霍夫
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基于fft的数字图像处理MATLAB实现-Fft based on MATLAB for digital image processing to achieve
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本文论述并设计实现了一个脱机自由手写体数字识别系统。文中首先对待识别数字的预处理进行了介绍,包括二值化、平滑滤波、规范化、细化等图像处理方法;其次,探讨了如何提取数字字符的结构特征和笔划特征,并详细地描述了知识库的构造方法;最后采用了以知识库为基础的模板匹配识别方法,并以MATLAB作为编程工具实现了具有友好的图形用户界面的自由手写体数字识别系统。实验结果表明,本方法具有较高的识别率,并具有较好的抗噪性能。-In this paper, designed and implemented an o
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图像处理中对二维图像进行fft变换时需要用的fft程序-Image processing two-dimensional images of fft transform procedure when the need for fft
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基于MATLAB的图像离散傅立叶变换研究,含matlab程序-matlab FFT image processing
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mathlab for image processing 2D, DFT, FFT etc.
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针对图像进行快速傅里叶变换,方便进行频频分析与处理。-Fast Fourier transform for the image, to facilitate frequent analysis and processing.
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应用MATLAB语言编写低通滤波器,对含噪图像作低通滤波处理- Using the MATLAB language compilation low pass filter, to contains chirp the image to make low-pass filtering processing
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傅立叶变换是数字图像处理中应用最广的一种变换,其中图像增强、图像复原和图像分析与描述等,每一类处理方法都要用到图像变换,尤其是图像的傅立叶变换。常用的图像增强技术可分为基于空域和基于变换域的两类方法。最常用的变换域是频域空间。在频域空间,图像的信息表现为不同频率分量的组合。如果能让某个范围内的分量或某些频率的分量受到抑制而让其他分量不受影响,就可以改变输出图像的频率分布,达到不同的增强目的。
4、高通滤波- 锐化
-Fourier transform in digital
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设计一个MATLAB界面,用于图像处理,实现了灰度拉伸,K邻近均值滤波,FFT变换,同态滤波,边缘检测,图像分割,均衡化等-A MATLAB interface design for image processing, gray stretch, K neighboring mean filtering, FFT transform, homomorphic filtering, edge detection, image segmentation, equalization
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图像处理的一些基本变换,FFT,IFFT,DCT,IDCT,小波变换,哈夫曼编码等的MATLAB程序代码。-Some basic image processing transform, FFT, IFFT, DCT, IDCT, wavelet transform, Huffman coding MATLAB program code.
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基于matlab图像处理功能实现,包括滤波,锐化,fft等-function of image processing based on matlab
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photoshop,基于matlab的GUI界面,实现对图像的处理。包含背景处理,化直方图,fft,加噪声等等。-matlab-based GUI interface, photoshop, image processing. Contains background processing, histogram, FFT, plus noise.
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数字图像处理matlab实验源程序
DCT变换 FFT变换等-Digital image processing matlab source experiment
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快速傅里叶变换在图像处理中经常遇到,本程序运行结果和matlab一致,是使用C++类编写的。-Fast Fourier transform in image processing are often encountered, the program consistent with the results and matlab is prepared using C++ class.
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利用matlab进行傅里叶变换及反变换,实现空域到频域,频域到空域的图像处理(Using Fourier transform and inverse transform, to achieve the airspace to the frequency domain, frequency domain to the airspace image processing)
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