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Description: This program compress and recostruct using wavelets. We can select level of decomposition(here maximum 4 levels are given) of images using selected wavelet.
For eg:-wavelets can be haar, db1, db2,dmey...............
Decomposition can be viewed in figure.
(Please note that select 256X256 image for better result.)
Then compression can performed,
PERFL2 give compression score.
Then reconstruction can be performed.
Each decompsition we can choose different threshold values.
For each threshold value we can calculate mse,psnr,pq(picture quality),
bit ratio etc. To get pq install pqs function .
Platform: |
Size: 3674 |
Author: 陈语恬 |
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Description: PSNR 用来计算峰值信噪比的函数。可以输入两个yuv文件得出平均值-PSNR peak signal-to-noise ratio used to calculate the function. 2 can import documents obtained average yuv
Platform: |
Size: 5120 |
Author: 段云 |
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Description: This program compress and recostruct using wavelets. We can select level of decomposition(here maximum 4 levels are given) of images using selected wavelet.
For eg:-wavelets can be haar, db1, db2,dmey...............
Decomposition can be viewed in figure.
(Please note that select 256X256 image for better result.)
Then compression can performed,
PERFL2 give compression score.
Then reconstruction can be performed.
Each decompsition we can choose different threshold values.
For each threshold value we can calculate mse,psnr,pq(picture quality),
bit ratio etc. To get pq install pqs function . -This program compress and recostruct using wavelets. We can select level of decomposition (here maximum 4 levels are given) of images using selected wavelet.For eg:-wavelets can be haar, db1, db2, dmey ........ ....... Decomposition can be viewed in figure. (Please note that select 256X256 image for better result.) Then compression can performed, PERFL2 give compression score.Then reconstruction can be performed.Each decompsition we can choose different threshold values . For each threshold value we can calculate mse, psnr, pq (picture quality), bit ratio etc. To get pq install pqs function.
Platform: |
Size: 3072 |
Author: 陈语恬 |
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Description: 完成对输入图像Fig8.23.jpg利用Haar小波进行图像小波变换，变换系数量化，小波逆变换完成图像重构，并计算其重构图像的均方误差和信噪比来评估图像的重构误差-Completion of the input image Fig8.23.jpg use Haar wavelet image wavelet transform, transform coefficients quantify the inverse wavelet transform the completion of image reconstruction, and calculate the reconstructed image of the mean square error and signal to noise ratio to assess the image reconstruction error
Platform: |
Size: 131072 |
Author: 朱为总 |
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Description: a package to calculate the harr wavelet coefficents.
Platform: |
Size: 184320 |
Author: weilyli |
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Description: 这个是用来计算Haar-like特征数目的，用MATLAB求的某一个矩形特征的数目-This is used to calculate the number of Haar-like features, with the MATLAB find a certain number of characteristics of a rectangular
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Size: 304128 |
Author: 冀国亮 |
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Description: 这个文件时用来计算haar-like特征的具体值的程序，用MATLAB写的，很不错呢-This file is used to calculate the haar-like features of the specific value of the program, written using MATLAB, pretty good
Platform: |
Size: 5120 |
Author: 冀国亮 |
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Description: matlab 代码，用于积分图计算，对haar特征和adaboost算法学习者是个不错的代码-matlab code used to calculate the integral map of haar features and adaboost algorithm code is a good learner
Platform: |
Size: 3072 |
Author: 苏军 |
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Description: This project focuses on calculating the similarity between the images using genetic algorithm and haar-wavelet. Haar wavelet is being used in order to calculate the images with different features like various expressions or gloomy or other characteristics.
This system extracts the feature from images by wavelet transform, and provides a user-friendly means to retrieve an image from a large database when the user cannot clearly define what the image must be.
Platform: |
Size: 865280 |
Author: harshit |
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Description: 利用哈尔小波变换进行分尺度分析并计算每个尺度下的能量-Use Haar wavelet transform to analyze and calculate the energy sub-scales under each scale
Platform: |
Size: 1024 |
Author: aero |
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Description: 傅里叶变换是用一系列不同频率的正余弦函数去分解原函数，变换后得到是原函数在正余弦不同频率下的系数。
小波变换使用一系列的不同尺度的小波去分解原函数，变换后得到的是原函数在不同尺度小波下的系数。
不同的小波通过平移与尺度变换分解，平移是为了得到原函数的时间特性，尺度变换是为了得到原函数的频率特性。
小波变换步骤：
1.把小波w(t)和原函数f(t)的开始部分进行比较，计算系数C。系数C表示该部分函数与小波的相似程度。
2.把小波向右移k单位，得到小波w(t-k)，重复1。重复该部知道函数f结束.
3.扩展小波w(t)，得到小波w(t/2)，重复步骤1,2.
4.不断扩展小波，重复1,2,3.
我这里使用的haar小波，缩放函数是[1 1]，小波函数是[1 -1]。-Fourier transform is a series of sine and cosine functions of different frequencies to the decomposition of the original function, after transform the original function in different frequency sine and cosine coefficients. Wavelet transform using a range of different scales of the wavelet decomposition to the original function, after transform the original function coefficients at different scales wavelets. Different wavelet decomposition by translation and scaling, translation is to get the time characteristics of the original function, in order to obtain the frequency scaling characteristics of the original function. Wavelet transform steps: 1. wavelet w (t) and the original function f (t) of the beginning of the comparison, calculate the coefficient C. The coefficient C indicates the degree of similarity of the function and wavelets. 2. Wavelet k units to the right, get the wavelet w (tk), repeat 1. Repeat this end portion know the function f. 3. Extended wavelet w (t), to obtain the
Platform: |
Size: 1024 |
Author: lucy |
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