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huffman_f
- huffman_f 在huffman_e的基础上,将排序改为利用堆排序原理选择最小的两个权值。也即,将所有元素的权值组织成堆后,每次堆内的根结点就是最小值了。每取出一个根结点后,就把堆尾元素调到根结点重建堆。取出两个最小值合并成一个子树后,再把子树作为叶子结点放到堆中,并让其上升到合适的位置,保持堆性质不变。因为每次不必完成整个排序过程,而只是组织成堆,因此,这种方法要比使用快速排序更快。上述算法参考了mg-1.2.1中Huffman编码的实现,见http://www.cs.mu.oz.au/m
ST_pub
- This a research (and didactic) oriented toolbox to explore the PROSAC algorithm. The functions are reasonably well documented and there is a directory containing examples to estimate lines and homographies in presence of outliers. However a previous
GraphGA-DynamicGraphDrawingWithHybridizedGA
- Hierarchica graph drawing using genetic algorithms. We start with a hierarchical graph containing multiple layers and we create a group of chromozoms from the input layered graph. We have inter-layer and intra-layer crossing. We use the minimum edge
Convex_hullAlgorithm
- 实用的凸包算法,包括计算点与水平线的夹角,二分法排序,找极点等。-A practical convex hull algorithm, including calculating angle of the point and horizontal line, dichotomy sort, looking for poles and so on.
mapLSB
- 基于BMP图像格式调色板排序的的信息隐藏算法-Palette based image format BMP sort of information hiding algorithm
mergeGraph
- Graphic Merge sort algorithm which shows how the array is being partitioned. It uses dev-cpp winbgim graphics library.
Logistic
- :提出了一种新的基于混沌映射与排序变换的图像加密算法。混沌序列具有容易生成、对初始条件敏感以及具备白噪声的统计特性等优点。该算法利用混沌映射对初值的敏感性和伪随机性,通过对生成的混沌序列排序来得到图像置乱的地址变换码,由于排序的不规则性,因此新的混沌图像置乱算法具有较强的保密性能。通过对该算法的置乱性能分 析并进行仿真实验,结果表明,新算法具有良好的图像加密性能。-his paper presents a new encryption algorithm based on chaotic m
Semi-fragile-spatial-watermarking
- 提出一种基于图像认证的半脆弱数字水印算法。该算法具有较好的自适应性,采用改进的低通滤波器,根据人眼的分辨能力设定 梯度阈值。实验结果证明,该算法对常规图像处理操作具有较强的鲁棒性,能够抵御JPEG顶级有损压缩,同时对于恶意篡改攻击(擦除、扭曲、挤压、光照等操作)表现出脆弱性,可检测出篡改的痕迹和类型。 -A semi-fragile watermark algorithm for image authentication is proposed, which has adaptabilit
zigzag_dezigzag
- zigzag算法,即实现图像像素的斜向Z字型重新排序的matlab实现-zigzag algorithm, namely the realization of the image pixel oblique Z-shaped re-sort Matlab
443423cdsd
- 提出了一种基于灰度图像的二维中值滤波算法。该算法每次只考虑滑动窗中移入的新数据,并充分利用了相 邻象素间的相关信息,避免了传统算法因排序所需的大量数据比较。该算法比较次数仅与窗口行或列尺寸有关,比传统方法 在处理速度上有较大提高-2D median filtering algorithm based on gray-scale images. The algorithm is time to consider a sliding window to move the new data,
spiht
- 基于多级树集合分裂排序(spiht)的图像压缩算法-Image compression algorithm based on a collection of multi-level tree split-Sort (spiht) of
mark2010estimate
- 实现一种绝对值排序的数字图像水印算法,对于频域系数进行排序然后设计新的检测器-An absolute value of the sort of digital image watermarking algorithm, to sort then design a new detector for frequency-domain coefficients
huffman
- 功能:用huffman tree去编码一个文档 算法:记录每次排序前的顺序从而构建树结构,用排序前位置为1记录各个节点-function:Encoding a document using huffman tree algorithm:records before each sort order to build the tree structure, sorted former position as a record of each node
detectSurface
- 针对摸个引用,能够分离有限元模型的表面。-It can be useful to separate the surface of a finite element model for certain applications such as fatigue analysis. For example, if cracks are known to initiate on the material surface, then the inclusion of sub-surface element
quikesort
- 一个快速排序的算法及实现过程,也实现了真正排序的过程。-A quick sort algorithm and the realization of the process, but also the realization of a real process of sorting.
ExtendHoughCircle
- 图像的霍夫变换算法(按照分数高低排序,并过滤掉分数过低的圆)-Image Hough transform algorithm (according to the scores they sort, and filter out low scores circle)
11
- 一种基于图像灰度的快速匹配算法 在图像模板匹配问题中,基于像素灰度值的相关算法尽管已经十分普遍,并得到广泛的应用,但目前此类算法都还存在有时间复杂度高、对图像亮度与尺寸变化敏感等缺点.为了克服这些缺点,提出一种新的基于图像灰度值的编码表示方法.这种方法将图像分割为一定大小的方块(称为R-块),计算每个R-块图像的总灰度值,并根据它与相邻R-块灰度值的排序关系进行编码.然后通过各个R-块编码值的比较,实现图像与模板的匹配新算法中各个R-块编码的计算十分简单 匹配过程只要对编码值进行
43646550
- 堆排序算法,the heap sort algorithm()