Description: 此为基于二代提升小波的阈值压缩算法源码，其中可以设置小波变换的分解层数，使用的小波名称，及各层阈值设置计算公式中的参数。并将低频系数转化为十六进制，方便在其上进一步压缩，如采用Huffman压缩等，程序思路清楚，附有完整的注释，可以使用多种小波，并且很好得体现了二代小波的思想，对于初学小波者帮助很大。-based on the second generation of this upgrade wavelet compression algorithm threshold source, which can set wavelet transform decomposition level, the use of wavelet name, threshold levels and set the formula for calculating the parameters. And low-frequency coefficients into hexadecimal facilitate its further compression, such as the Huffman compression. procedures ideas clearly, with the integrity of the Notes, you can use a variety of wavelet, and reflected very well in the second generation wavelet thinking, For beginners who wavelet of great help. Platform: |
Size: 12454 |
Author:孙金凤 |
Hits:
Description: 此为基于二代提升小波的阈值压缩算法源码，其中可以设置小波变换的分解层数，使用的小波名称，及各层阈值设置计算公式中的参数。并将低频系数转化为十六进制，方便在其上进一步压缩，如采用Huffman压缩等，程序思路清楚，附有完整的注释，可以使用多种小波，并且很好得体现了二代小波的思想，对于初学小波者帮助很大。-based on the second generation of this upgrade wavelet compression algorithm threshold source, which can set wavelet transform decomposition level, the use of wavelet name, threshold levels and set the formula for calculating the parameters. And low-frequency coefficients into hexadecimal facilitate its further compression, such as the Huffman compression. procedures ideas clearly, with the integrity of the Notes, you can use a variety of wavelet, and reflected very well in the second generation wavelet thinking, For beginners who wavelet of great help. Platform: |
Size: 12288 |
Author:孙金凤 |
Hits:
Description: 加深对图像变换的理解。计算图像的离散余弦变换J；设置不同的量化门限，计算其逆变换IDCT，并显示。-Deepen the understanding of the image transform. Calculating the discrete cosine transform image J setting different quantization threshold to calculate the inverse transform IDCT, and displayed. Platform: |
Size: 28672 |
Author:Ashtray |
Hits:
Description: SUSAN算子用于角点检测的基本步骤： 1） 对于感兴趣的每个象素点（一般的情况就是图像中的每个象素点）作用一圆模板； 2） 根据亮度比较函数计算圆模板中的USAN区域； 3） 根据几何阈值，计算象素点的初始响应； 4） 使用USAN重心与核中心的距离法则去除伪角点，使用USAN重心与核中心的连线上的每个点都必须在USAN区域来保证算法的一致性（即USAN区域的相连性） 5） 对每个象素点的响应，使用 （或更大）的窗口搜索局部极大值，进行非极大值抑制 -SUSAN operator for corner detection of the basic steps: 1) For each pixel of interest points (the general situation is that each image pixel points) the role of one circle template 2) calculated according to the brightness comparison function round Usan template region 3) According to the geometric threshold, calculating the pixel-point initial response 4) the use of Usan center of gravity and nuclear center removed from the law of pseudo-corner, the use of Usan center of gravity and nuclear center to connect the each point must be in the Usan region to ensure consistency algorithm (that is linked to sexual Usan region) 5) points for each pixel in response to, the use of (or greater) of the local maxima search window for non-polar large value of inhibition Platform: |
Size: 4109312 |
Author:张妙言 |
Hits:
Description: 小波阈值去噪，比较了软阈值，硬阈值及当今各种阈值计算方法和阈值函数处理方法的性能，通过信噪比及均方差的比较，得出各种的算法的优劣。-Wavelet threshold denoising compared soft threshold and hard threshold and the current method of calculating the various thresholds and thresholds approach the performance of function, through the signal to noise ratio and mean square deviation of the comparison, the various algorithms advantages and disadvantages. Platform: |
Size: 3072 |
Author:李冰 |
Hits:
Description: 针对传统图像相关匹配算法计算量较大的问题,研究图像库中相关图像搜索方法. 提出一种改进的相关
匹配算法,该方法通过对相关系数公式进行简化和迭代运算,减少了重复运算. 通过设定参考图像与目标图像的相
关系数阈值,只需计算方差相差较小的点的相关系数,提高了运算速度,计算时间减少到原来的14 ％ ,甚至更短.
在文件夹的图像搜索中实现了图像的快速匹配.-Traditional image correlation algorithm to match the volume of the larger issues, research image library, image search method. An improved matching algorithm, the method of correlation coefficient formula and iterative calculations can be simplified, reducing duplication of computing. by setting the reference image and target image of the correlation coefficient threshold, simply calculating the variance of the point difference between the smaller the correlation coefficient to improve the computing speed, computing time was reduced to the original 14, or less. in the folder Image Search achieving rapid image matching. Platform: |
Size: 241664 |
Author:李锋 |
Hits:
Description: 第一步是计算输人信号单边功率谱密度（ESD）。使用快
％速傅里叶（FFr）算法将信号从时域转换到频域。因为FFr算法的输出是离散谱，而这
％里我们需要的是连续谱，因此需要引人不同的比例因子来实现从离散谱到连续谱的转换。
％在第二步中，我们利用迭代算法计算出相对于特定阂值的ESD的最高和最低频率，从而
％估算出被检测信号所占用的带宽。这种算法同时适用于基带信号和已调制信号。最后，
％在第三步中，我们给出了输出图形的原代码。-The first step is calculating the input signal unilateral power spectral density (ESD). The use of fast Fourier speed (FFr) algorithm for the signal conversion from time domain to frequency domain. FFR algorithm because the output is a discrete spectrum, which we need is a continuous spectrum, so the need for food of different scale factor to achieve from the discrete spectrum to continuous spectrum conversion. In the second step, we use iterative algorithm to calculate a specific threshold in relation to the ESD of the highest and lowest frequency, thus estimated to be occupied by the signal detection bandwidth. This algorithm applies to both baseband signal and modulation signals. Finally, in the third step, we give the graphical output of the original code. Platform: |
Size: 2048 |
Author:jiangyue |
Hits:
Description: 频繁项集挖掘算法的计算复杂性和生成的频繁项集数量随着事务集项数的增加呈指数增长，最小支持度阈值成为控制这种增长的关键．然而，实际应用中仅使用支持度阈值难以有效控制频繁项集的规模．为此定义N个
最频繁项集挖掘问题，并提出基于支持度阈值动态调整策略的宽度优先搜索算法Apriori和深度优先搜索算法IntvMatrix挖掘N个最频繁项集．实验表明，本文的2种方法的效率比朴素方法高2倍以上，特别当N值较低时，本
文方法的效率优势更为明显．-Frequent itemsets mining algorithm for calculating the complexity and frequent itemsets generated by the number of sets with the affairs of an exponential increase in the number of growth, minimum support threshold to become the key to control this growth. However, the practical application using only support threshold difficult to effectively control the scale of frequent itemsets. For this reason the definition of N most frequent itemsets mining problem and based on support for dynamic adjustment of the threshold strategy-first search algorithm Apriori width and depth-first search algorithm IntvMatrix Mining N most frequent itemsets. Experiments show that the two kinds of methods than the simple method of high-efficiency 2 times more, particularly when the N value is low, the efficiency advantages of this method is more obvious. Platform: |
Size: 309248 |
Author:li |
Hits:
Description: 该方法采用反对称双正交小波分解系数计算视频帧的方向梯度向量，再统计由梯度向量角和模值构成的联合空间二维直方图，然后计算连续帧直方图之间的距离，得到两帧之间的不连续值，最后采用自适应阈值分割，检测出镜头边界。-This method is the use of anti-symmetric biorthogonal wavelet decomposition coefficients video frame the direction of gradient vector, and then statistics from the gradient vector angle and modulus values constitute the joint space of two-dimensional histogram, and then calculating the histogram for the distance between frames, by the two frames between the consecutive values, the final adaptive threshold segmentation, shot boundary detected. Platform: |
Size: 144384 |
Author:韩瑞冬 |
Hits:
Description: 针对夜间动态背景下的行人检测中分割算法受光照条件影响大、误识别多等问题，提出双阈值分割算法和以多目标跟踪为核心的算法框架。新的分割算法解决了行人亮度分布不均时的分割问题，同时在新的框架下可以综合多帧的处理结果进行综合判断，通过将基于支持向量机的识别算法和多目标跟踪算法的融合，降低了系统的计算量，且比一般的系统具有更高的识别率。
-At night the dynamic context of pedestrian detection segmentation algorithm affected by light conditions, and false identification of many other issues, the dual-threshold segmentation algorithm and a multi-target tracking algorithm as the core framework. New segmentation algorithm to solve the uneven distribution of brightness of pedestrians at the time of partition, while in the new framework of an integrated multi-frame can be the result of a comprehensive treatment of the judge, through the support vector machine-based recognition algorithms and multi-target tracking algorithm integration reducing system of calculating the volume, and than a typical system has a higher recognition rate. Platform: |
Size: 578560 |
Author:jacky1 |
Hits:
Description: 在数据挖掘算法中，计算属性的阈值算法，可以通过计算选择有效的属性-In the data mining algorithm, the calculation of property the threshold algorithm, you can select by calculating the effective property Platform: |
Size: 116736 |
Author:闫珍 |
Hits:
Description: PCA算法程序设计步骤：
1、取均值
2、计算协方差矩阵及其特征值和特征向量
3、计算协方差矩阵的特征值大于阈值的个数
4、降序排列特征值
5、去掉较小的特征值
6、去掉较大的特征值(一般没有这一步）
7、合并选择的特征值
8、选择相应的特征值和特征向量
9、计算白化矩阵
10、提取主分量
-PCA algorithm programming steps: 1, access means 2, the calculation of covariance matrix and its eigenvalues and eigenvectors 3, calculating the covariance matrix of eigenvalues greater than the threshold number of 4, in descending order of eigenvalues 5, remove the smaller eigenvalue 6, remove the larger eigenvalue (usually not this step) 7, the combined choice of eigenvalues 8, select the appropriate eigenvalues and eigenvectors 9, whitening matrix calculation 10, principal component extraction Platform: |
Size: 4096 |
Author:晓琳 |
Hits:
Description: 迭代法阈值分割，迭代法自动计算最优阈值。已经写成函数形式，输入灰度图，输出分割好后的阈值图。-Threshold segmentation iterative method, iterative method for automatically calculating the optimal threshold. Function has been written in the form of input grayscale output partition threshold after a good map. Platform: |
Size: 1024 |
Author:fang |
Hits:
Description: C语言实现的OTSU方法，计算图像二值化的自适应阈值-C language implementation of the OTSU method in calculating the adaptive image binarization threshold Platform: |
Size: 1024 |
Author:释然 |
Hits:
Description: The function apply soft thresholding to wavelet coefficients at decomposition level lev calculating the threshold adapted to the various
sub-bands-The function apply soft thresholding to wavelet coefficients at decomposition level lev calculating the threshold adapted to the various
sub-bands Platform: |
Size: 1024 |
Author:Marcella |
Hits:
Description: 此代码，可以完成matlab下的小波软阈值图像去噪，可以做不同阈值下的图像去噪，并通过峰值信噪比psnr的比对来说明阈值选取的方法-Wavelet threshold denoising compared soft threshold and hard threshold and the current method of calculating the various thresholds and thresholds approach the performance of function, through the signal to noise ratio and mean square deviation of the comparison, the various algorithms advantages and disadvantages. Platform: |
Size: 67584 |
Author:彭社钦 |
Hits:
Description: 阈值分割的一种方法，通过计算最大方差的方法，附带文字步骤原理-A threshold segmentation method, the method for calculating the maximum variance, with the text note Platform: |
Size: 1024 |
Author: |
Hits:
Description: 此为基于二代提升小波的阈值压缩算法源码，其中可以设置小波变换的分解层数，使用的小波名称，及各层阈值设置计算公式中的参数。并将低频系数转化为十六进制，方便在其上进一步压缩，如采用Huffman压缩等，程序思路清楚，附有完整的注释，可以使用多种小波，并且很好得体现了二代小波的思想，对于初学小波者帮助很大。-。-based on the second generation of this upgrade wavelet compression algorithm threshold source, which can set wavelet transform decomposition level, the use of wavelet name, threshold levels and set the formula for calculating the parameters. And low-frequency coefficients into hexadecimal facilitate its further compression, such as the Huffman compression. procedures ideas clearly, with the integrity of the Notes, you can use a variety of wavelet, and reflected very well in the second generation wavelet thinking, For beginners who wavelet of great help.
Platform: |
Size: 12288 |
Author:徐立强 |
Hits:
Search - calculating threshold