Search - 2d fft

[Windows Develop] 二维快速傅立叶变换

Description: This document introduces the techniques of fast Fourier transform and gives a source code in C for computing 2D FFT on image data.
Platform: | Size: 31491 | Author: 冰城 | Hits:

[Special Effects] FFT2Dsource

Description: 二维FFT(快速傅立叶变换)变换源代码,可编译通过并能正常运行.-2D FFT (Fast Fourier Transform) transform source code, compile and can operate normally.
Platform: | Size: 295840 | Author: 黄钦 | Hits:

[Compress-Decompress algrithms] 2007202131

Description: Image Compression A collection of simple routines for image compression using different techniques. 图象压缩的不同方法 BTCODE: Image compression Using Block Truncation Coding. PYRAMID: Image compression based on Gaussian Pyramids. DCTCOMPR: Image compression based on Discrete Cosine Transform. IMCOMPR: Image compression based on Singular Value Decomposition. The given codes can be also used in 2D noise suppression. Notes: The function \"conv2fft\" performs a 2D FFT-based convolution. Type \"help conv2fft\" on Matlab command window for more informations.
Platform: | Size: 10228 | Author: 王云云 | Hits:

[Documents] 2DFFT-C

Description: 一个二维Fourier变换的程序适用于256*256的点阵，用于应付一般的数字图像处理需要-a two-dimensional Fourier transform procedures apply to the 256* 256 dot matrix, used to meet the general needs of digital image processing
Platform: | Size: 7168 | Author: 李子刚 | Hits:

[2D Graphic] ImageFFT2

Description: VC编写的高效的图象2D快速傅立叶正变换程序,编译通过.适合256色bmp图象变换.效果和matlab的fft2()没法比,但是程序值得借鉴.适合图象处理初学者,有助于理解傅立叶变换在图象处理中的重要作用.-VC efficient preparation of the image is 2D fast Fourier transform procedures compile. Bmp for 256-color image transformation. Results and Matlab fft2 () no match for, but the procedure is worth learning from. Image processing for beginners, helps to understand Fourier transform in the image processing an important role.
Platform: | Size: 84992 | Author: 李安定 | Hits:

[Algorithm] fft2d

Description: 2维fft程序，包括fortran和c语言-2-D fft procedures, including the fortran and c language
Platform: | Size: 61440 | Author: muyou | Hits:

[GDI-Bitmap] FFT2Dsource

Description: FFT2Dsource.rar这是实现2维FFT运算的程序源码 -This is FFT2Dsource.rar realize 2-D FFT computation procedure source
Platform: | Size: 7231488 | Author: lijian | Hits:

[Other] two_dimensional_PSD

Description: 二维功率谱密度计算程序使用傅里叶变换 -2D PSD caculation estimator
Platform: | Size: 1024 | Author: 陈建超 | Hits:

[Graph program] efficient_registration

Description: 利用傅里叶变换，在频域上对两幅图像配准，是一种比较配准的新方法，但是对弹性配准的效果不是很好需要进一步的研究。-Registers two images (2-D rigid translation) within a fraction of a pixel specified by the user. Instead of computing a zero-padded FFT (fast Fourier transform), this code uses selective upsampling by a matrix-multiply DFT (discrete FT) to dramatically reduce computation time and memory without sacrificing accuracy
Platform: | Size: 5120 | Author: wangwei | Hits:

[Special Effects] TwoDimensionalFastFourierTransform

Description: 本实验要求开发一个2-D FFT程序包，使其可以应用于后续的几个实验。这个程序需要完成的功能是用因子（-1）^(x+y)乘以输入图像以实现滤波的中心变换，并还要求用一个实矩阵乘以一个复数矩阵通过调用两个图像的乘法程序来实现对应元素的相乘，同时计算反傅立叶变换，得到的结果乘以（-1）^(x+y)并取其实部最后计算频谱。实验中用到傅立叶变换的基本公式，通过实验我们可以更加深刻的理解频域滤波的基础。-The experiment calls for the development of a 2-D FFT package so that it can be applied to a number of follow-up experiment. This process needs to be done is to factor the function (-1) ^ (x+ y) multiplied by the input image to achieve the center of filter change, and also requires a real matrix multiplied by a complex matrix by calling the two images of the multiplication process to achieve multiplication of the corresponding elements, calculating the anti-Fourier transform at the same time, the result multiplied by (-1) ^ (x+ y) and check the final calculation of the Department of the spectrum in fact. Fourier transform experiment used the basic formula, we can experiment more profound understanding of the basis of frequency domain filtering.
Platform: | Size: 142336 | Author: jhm | Hits:

[MPI] convolutionFFT2D

Description: 基于fft的2d旋转 FFT-based 2D convolution-FFT-based 2D convolution
Platform: | Size: 323584 | Author: xiangxingbin | Hits:

[Software Engineering] matlab_image_processing

Description: mathlab for image processing 2D, DFT, FFT etc.
Platform: | Size: 25600 | Author: Canggih Adiyasa | Hits:

[2D Graphic] fft_2D_picture

Description: 二维图像处理的fft变换，二维fft，youknow -you will love it!it is very useful .that is right .you know
Platform: | Size: 1858560 | Author: zhuran | Hits:

[Graph program] ImageFFT

Description: 包括了大规模矩阵转置 2D-FFT运算生成FFT排序表生成FFT数据文件-Includes a large-scale matrix transpose operation generated 2D-FFT FFT FFT sort table data file generated
Platform: | Size: 2048 | Author: 陆琨 | Hits:

[Special Effects] 2DFFT-C

Description: 2d FFT 图象处理，不含界面，公有算法实现-The 2D FFT
Platform: | Size: 7168 | Author: Tiger | Hits:

[Other] analysis

Description: This example will demonstrate the use of the FFT function to calculate\na 2D-FFT. Given that the data represents the width and the delay of two\nsignals this program calculates the 2D-FFT and displays the result on an\nintensity graph. Note that the results are Nyquist shifted so that low\nfrequencies appear in the center-This example will demonstrate the use of the FFT function to calculate\na 2D-FFT. Given that the data represents the width and the delay of two\nsignals this program calculates the 2D-FFT and displays the result on an\nintensity graph. Note that the results are Nyquist shifted so that low\nfrequencies appear in the center
Platform: | Size: 8192 | Author: jar | Hits:

[Algorithm] FFT

Description: Efficient 1d and 2d FFT algorithm in C
Platform: | Size: 2048 | Author: 8-bit | Hits:

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