Search - frequency domain filter

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[GDI-Bitmap] digitalimageprocess DL : 0: 图象的灰度变换图象的正交变换图像的空域滤波图像的频域滤波-image of the gray-scale image Orthogonal Transform Image Transform Image's air filter in the frequency domain filtering
Date : 2008-10-13 Size : 897.03kb User : kaisa
[GDI-Bitmap] lupo DL : 0: C#开发的小区域频域滤波(128*128), 维纳滤波,最小平方滤波,八特了死滤波,等-C# development of small regional frequency domain filtering (128 * 128), the Wiener filter, the minimum square filtering, eight of the dead special filtering, etc.
Date : 2008-10-13 Size : 19.2kb User : ddd
[GDI-Bitmap] 对图像进行中值滤波处理的源代码 DL : 0: 平滑滤波一般来说，图像的能量主要集中在其低频部分，噪声所在的频段主要在高频段，同时系统中所要提取的汽车边缘信息也主要集中在其高频部分，因此，如何去掉高频干扰又同时保持边缘信息，是我们研究的内容。为了去除噪声，有必要对图像进行平滑，可以采用低通滤波的方法去除高频干扰。图像平滑包括空域法和频域法两大类，在空域法中，图像平滑的常用方法是采用均值滤波或中值滤波，对于均值滤波，它是用一个有奇数点的滑动窗口在图像上滑动，将窗口中心点对应的图像像素点的灰度值用窗口内的各个点的灰度值的平均值代替，如果滑动窗口规定了在取均值过程中窗口各个像素点所占的权重，也就是各个像素点的系数，这时候就称为加权均值滤波；对于中值滤波，对应的像素点的灰度值用窗口内的中间值代替。实现均值或中值滤波时，为了简便编程工作，可以定义一个n*n的模板数组。另外，读者需要注意一点，在用窗口扫描图像过程中，对于图像的四个边缘的像素点，可以不处理；也可以用灰度值为\"0\"的像素点扩展图像的边缘。下面给出了采用加权均值滤波的图像平滑函数代码和效果图：-smoothing filter general, the image of energy is mainly focused on the low-frequency part of the noise lies mainly in the high-frequency band, which system to extract the vehicle Edge Information has been concentrated in some of its high frequency, therefore, how to remove high-frequency interference at the same time, maintain the edge information, we Institute enforcement of the content. In order to remove noise, it is necessary for smooth images can be used to the low-pass filter to remove high-frequency interference. Image Smoothing including airspace and frequency domain method two categories, in the airspace law, the common image smoothing method is used Mean Median filter or filter for filtering mean, it is an odd point in the sliding window on the sliding images of the corresponding
Date : 2008-10-13 Size : 42.83kb User : 123
[GDI-Bitmap] PhotoKing DL : 0: 多种图象编码其中包括滤波边缘检测频域（缚氏变换小波变换 DCT变换）变换信噪比-multiple image coding including edge detection filter frequency domain (Fourier transform tied wavelet transform DCT) Transform SNR
Date : 2008-10-13 Size : 360.49kb User : 唐盈
[GDI-Bitmap] 频域滤波 DL : 0: 频域滤波，包括梯形低/高通滤波，理想低/高通滤波，布尔沃什低/高通滤波和指数低/高通滤波等-frequency domain filtering, including the trapezoid low / high pass filters, ideal low / high pass filter, Buerwoshen low / high pass filter and index low / high pass filter, etc.
Date : 2008-10-13 Size : 285.62kb User : jia
[GDI-Bitmap] 对图像进行中值滤波处理的源代码 DL : 0: 平滑滤波一般来说，图像的能量主要集中在其低频部分，噪声所在的频段主要在高频段，同时系统中所要提取的汽车边缘信息也主要集中在其高频部分，因此，如何去掉高频干扰又同时保持边缘信息，是我们研究的内容。为了去除噪声，有必要对图像进行平滑，可以采用低通滤波的方法去除高频干扰。图像平滑包括空域法和频域法两大类，在空域法中，图像平滑的常用方法是采用均值滤波或中值滤波，对于均值滤波，它是用一个有奇数点的滑动窗口在图像上滑动，将窗口中心点对应的图像像素点的灰度值用窗口内的各个点的灰度值的平均值代替，如果滑动窗口规定了在取均值过程中窗口各个像素点所占的权重，也就是各个像素点的系数，这时候就称为加权均值滤波；对于中值滤波，对应的像素点的灰度值用窗口内的中间值代替。实现均值或中值滤波时，为了简便编程工作，可以定义一个n*n的模板数组。另外，读者需要注意一点，在用窗口扫描图像过程中，对于图像的四个边缘的像素点，可以不处理；也可以用灰度值为"0"的像素点扩展图像的边缘。下面给出了采用加权均值滤波的图像平滑函数代码和效果图：-smoothing filter general, the image of energy is mainly focused on the low-frequency part of the noise lies mainly in the high-frequency band, which system to extract the vehicle Edge Information has been concentrated in some of its high frequency, therefore, how to remove high-frequency interference at the same time, maintain the edge information, we Institute enforcement of the content. In order to remove noise, it is necessary for smooth images can be used to the low-pass filter to remove high-frequency interference. Image Smoothing including airspace and frequency domain method two categories, in the airspace law, the common image smoothing method is used Mean Median filter or filter for filtering mean, it is an odd point in the sliding window on the sliding images of the corresponding
Date : 2025-12-13 Size : 43kb User :
[GDI-Bitmap] PhotoKing DL : 0: 多种图象编码其中包括滤波边缘检测频域（缚氏变换小波变换 DCT变换）变换信噪比-multiple image coding including edge detection filter frequency domain (Fourier transform tied wavelet transform DCT) Transform SNR
Date : 2025-12-13 Size : 360kb User : 唐盈
[GDI-Bitmap] 频域滤波 DL : 0: 频域滤波，包括梯形低/高通滤波，理想低/高通滤波，布尔沃什低/高通滤波和指数低/高通滤波等-frequency domain filtering, including the trapezoid low/high pass filters, ideal low/high pass filter, Buerwoshen low/high pass filter and index low/high pass filter, etc.
Date : 2025-12-13 Size : 285kb User : jia
[GDI-Bitmap] digitalimageprocess DL : 0: 图象的灰度变换图象的正交变换图像的空域滤波图像的频域滤波-image of the gray-scale image Orthogonal Transform Image Transform Image's air filter in the frequency domain filtering
Date : 2025-12-13 Size : 1.41mb User : kaisa
[GDI-Bitmap] lupo DL : 0: C#开发的小区域频域滤波(128*128), 维纳滤波,最小平方滤波,八特了死滤波,等-C# development of small regional frequency domain filtering (128* 128), the Wiener filter, the minimum square filtering, eight of the dead special filtering, etc.
Date : 2025-12-13 Size : 48kb User : ddd
[GDI-Bitmap] filters_infrequencydomain DL : 0: 本程序为matlab上撰写Ideal, Butterworth, Gaussian, Homomorphic 等四种Filtering应用在Frequency Domain的程序。 -the procedures for writing a Matlab Ideal, Butterworth, Gaussian, Homomorphic four other applications Frequency Filtering Domai n procedures.
Date : 2025-12-13 Size : 5kb User : 黎智