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Description: in this paper,wo propose an extension of the zerotree-based space-frequency quantization algorithm by adding a wedgelet symbol to its tree-pruning optimization.-in this paper. wo propose an extension of the zeotree-based s pace-frequency quantization algorithm by add ing a wedgelet symbol to its tree-pruning optim ization.
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Size: 269815 |
Author: 金金 |
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Description: 是在delphi7的环境下，视频演示向数据库中存入图像。-store image into database through video frequency in the environment of delphi7
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Size: 1326080 |
Author: 郝秦 |
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Description: 图像频率域的变换方法集合，含有fft,dct,wavlet等-Image Transform the frequency domain method pool, containing fft, Copy, etc. wavlet
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Size: 5120 |
Author: Gan |
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Description: vb版本的fft变换，能够正反变换。正变换：
把时域信号转换成频域信号，反变换：能够把频域信号转换成时域信号。fft可广泛应用于工程领域，例如：信号的频域分析。震动，噪声的分析等等。-vb version of the fft transform, to transform pros. Transformation : put time domain signal into frequency domain signal, anti-transformation : can frequency-domain signal into time domain signal. Fft can be widely used in engineering fields, such as : the frequency-domain analysis. Vibration, noise analysis, and so on.
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Size: 2048 |
Author: zxf |
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Description: This function spatially filters an image, using the Fast Fourier transform and a user-supplied frequency filter function. The filter must be real (amplitude only) and bilaterally symmetric.
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Size: 32768 |
Author: fei |
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Description: 用MATLAB对一图象分别用不同小波分解，观察高低频部分进行重构，比较重构误差，再进行阈值消噪，比较消噪前后图象。-MATLAB right one image with different wavelet decomposition, high-low-frequency observations for some remodeling, more reconstruction error and then de-noising, compared before and after image denoising.
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Size: 1024 |
Author: 刘丽丽 |
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Description: 基于一级小波变换的将2值图像嵌入宿主图像低频子带的水印嵌入及提取算法-based on a wavelet transform the image of two images embedded host low-frequency band and the embedded watermark extraction algorithm
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Size: 58368 |
Author: li yue |
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Description: 本程序实现利用小波变换对图像进行分解，获取其低频和高频部分-the program using wavelet image decomposition, their access to low-frequency and high-frequency part of
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Size: 3717120 |
Author: 薛燕 |
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Description: 图像处理完成有关直方图修改技术、平滑、锐化、几何以及频域变换等典型算法的编制，并提供对图像示例的测试结果和分析说明，开发与理论教学相配合的计算机图像处理与分析的演示系统。-image processing to complete the histogram modification technique, smooth, sharpening, geometry and the frequency domain algorithm typical transform the establishment, and provide examples of images of the test results and analysis show that Development and teaching the theory of compatible computer image processing and analysis of the demonstration system.
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Size: 2048 |
Author: qq |
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Description: C#开发频域图象处理,其中小波变换,K_L变换有待调整.-C# development of frequency-domain image processing, which wavelet transform, K_L transform subject to adjustments.
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Size: 88064 |
Author: qqq |
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Description: Matlab实现图像压缩与重构步骤
① 对图像进行小波分解，得到第一层分解的低频系数和高频系数。
② 保留低频系数，对高频系数进行基于神经网络的矢量量化编码，达到压缩。
③ 根据码书以w还原高频系数
④ 根据保留的低频系数和还原的高频系数重构图像
-Matlab realization image compression and the heavy
construction step (1) pair of picture carries on the wavelet to
decompose, obtains the first decomposition the low frequency
coefficient and the high frequency coefficient. (2) Retains the low
frequency coefficient, carries on to the high frequency coefficient
based on the nerve network vector quantification code, achieves the
compression. (3) To w returns to original state the low frequency
coefficient according to the code book and the return to original
state high frequency coefficient heavy composition which the high
frequency coefficient (4) basis retains likes
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Size: 19456 |
Author: 王危结 |
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Description: 一幅图象经过小波变换后为HH、HL、LH、LL四个子带,在小波变换的其中一个子带即h3嵌入水印,LH3为低高频子带 -an image after wavelet transform for HH, HL, LH, LL 4 subband. the wavelet transform of a subband that h3 embedded watermark, LH3 lower high-frequency band
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Size: 1024 |
Author: 刘德庆 |
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Description: 于傅里叶变换的图像加密技术研究
具体是将一幅图像用 fft 变换到频域
在频域中进行加密 我考虑的是通过随机相位来加密的方法，请问用matlab怎样实现
加密后在通过 ifft 得到加密后的图象
-Fourier transform in the image encryption technology to study the details of an image is to use fft transformed to the frequency domain in the frequency domain I consider encryption is through random-phase approach to encryption, Will the use of Matlab how to achieve the adoption of encryption ifft be encrypted images
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Size: 1024 |
Author: 李建成 |
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Description: matlab 下经典的利用wavedec2,appcoef2,detcoef2对图像进行分解提取高低频系数完成图像压缩和重构的源程序.-matlab under the classic use of wavedec2, appcoef2, detcoef2 image decomposition extraction coefficient of the completion of the high-low frequency image compression and reconstruction of the source.
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Size: 1024 |
Author: 桑圣洁 |
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Description: 提出一种基于视觉特性的图像摘要算法，增大人眼敏感的频域系数在计算图像Hash时的权重，使得图像Hash更好地体现视觉特征，并提高鲁棒性。将原始图像的分块DCT系数乘以若干由密钥控制生成的伪随机矩阵，再对计算的结果进行基于分块的Watson人眼视觉特性处理，最后进行量化判决产生固定长度的图像Hash序列。本算法比未采用视觉特性的算法相比，提高了对JPEG压缩和高斯滤波的鲁棒性。图像摘要序列由密钥控制生成，具有安全性。-Based on the visual characteristics of the image digest algorithm, increasing the human eye-sensitive frequency-domain coefficients in the calculation of the image when the weight of Hash, Hash makes images better reflect the visual characteristics, and improve robustness. Will block the original image multiplied by the number of DCT coefficients generated by the key control of pseudo-random matrix, then the results of calculation based on the sub-block of Watson HVS treatment, and finally quantify the judgments arising from fixed-length sequence of images Hash . Than the algorithm did not use the visual characteristics of the algorithm, improve the JPEG compression and Gaussian filtering robustness. Abstract image sequence generated by the key control, with security.
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Size: 167936 |
Author: kurt |
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Description: Wavelet transforms and other multi-scale analysis functions have been used for compact signal and image representations in denoising, compression and feature detection processing problems for about twenty years. Numerous research works have proven that space-frequency and spacescale expansions with this family of analysis functions provided a very efficient framework for signal or image data.
-Wavelet transforms and other multi-scale analysis functions have been used for compact signal and image representations in denoising, compression and feature detection processing problems for about twenty years. Numerous research works have proven that space-frequency and spacescale expansions with this family of analysis functions provided a very efficient framework for signal or image data.
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Size: 1091584 |
Author: serhius |
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Description: 交换两幅图像的相位谱，利用频域滤波消除周期噪声！-Exchange of two images of the phase spectrum, using frequency domain filtering periodic noise elimination!
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Size: 93184 |
Author: 王岚 |
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Description: Digital Image Fundamentals Image Enhancement in the Spatial Domain Image Enhancement in the Frequency Image Restoration Color Image Processing Wavelets and Multiresolution Processing Image Compression Morphological Image Processing Image Segmentation Representation and Description Object Recognition. -Digital Image Fundamentals Image Enhancement in the Spatial Domain Image Enhancement in the Frequency Image Restoration Color Image Processing Wavelets and Multiresolution Processing Image Compression Morphological Image Processing Image Segmentation Representation and Description Object Recognition.
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Size: 5950464 |
Author: Erica Costa |
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Description: 此程序是一个图形频率识别的范例，用C#编写的图像处理技术，里面带源码和相应的图片库。-this program is writed in c# in order to fix the frequency image,it include the C# source code and related pictures.
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Size: 2013184 |
Author: 许凡 |
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Description: The reason for doing the filtering in the frequency domain is generally because it is computationally faster to perform two 2D Fourier transforms and a filter multiply than to perform a convolution in the image (spatial) domain. This is particularly so as the filter size increases.
In what follows it is assumed that the reader is familiar with the Discrete Fourier Transform, its properties, and the transforms of commonly used functions (delta, noise, rectangular pulse, step, etc).
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Size: 208896 |
Author: faisel |
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