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Description: 一个用vb编写指纹识别程序，它通过二值化图象，计算阈值和统计黑像素值来识别-vb prepared with a fingerprint identification procedures, it adopted two binary images, calculated and statistical threshold value of black pixels to identify
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Size: 259072 |
Author: 刘恺 |
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Description: 车牌定位系统是进行车牌自动识别的重要一部分能正确的获得整个图象的车牌部分 具体步骤 1.24位真彩色->256色灰度图。 2.预处理:中值滤波。 3.二值化:用一个初始阈值T对图像A进行二值化得到二值化图像B。 初始阈值T的确定方法是:选择阈值T=Gmax-(Gmax-Gmin)/3,Gmax和Gmin分别是最高、最低灰度值。 该阈值对不同牌照有一定的适应性,能够保证背景基本被置为0,以突出牌照区域。 4.削弱背景干扰。对图像B做简单的相邻像素灰度值相减,得到新的图像G,即Gi,j= Pi,j-Pi,j-1 i=0,1,…,439 j=0,1,…,639Gi,0=Pi,0,左边缘直接赋值,不会影响整体效果。 5.用自定义模板进行中值滤波 区域灰度基本被赋值为0。考虑到文字是由许多短竖线组成,而背景噪声有一大部分是孤立噪声,用模板(1,1,1,1,1)T对G进行中值滤波,能够得到除掉了大部分干扰的图像C。 6.牌照搜索:利用水平投影法检测车牌水平位置,利用垂直投影法检测车牌垂直位置。 7.区域裁剪,截取车牌图像。-plates is positioning system for automatic vehicle identification can be an important part of the right of access to the entire image plates some of the specific steps 1.24 true color-gt; 256-color grayscale. 2. Pretreatment : median filter. 3. Binary : an initial threshold value T A pair of images for two to be two binary images B value. T initial threshold value to determine the method is : Select threshold T = Tc- (Tc-Gmin)/3, respectively Gmin saturated and is the highest and the lowest gray value. The threshold values for different licenses are certain adaptability, to ensure that basic background was home to 0, to highlight regional licenses. 4. Weakened background interference. The images do simple B adjacent pixel value is reduced, the new images to be G, Gi, j = Pi, j- Pi, j-1
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Size: 1497088 |
Author: 潘文 |
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Description: 自动寻找阈值，实现图像分割。很好用啊！VC 编写！- Automatically seeks the threshold value, the realization
picture division. Very easy to use! VC compilation!
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Size: 1024 |
Author: 刘明霞 |
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Description: 程序代码说明
P0401：用Prewitt算子检测图像的边缘
P0402：用不同σ值的LoG算子检测图像的边缘
P0403：用Canny算子检测图像的边缘
P0404：图像的阈值分割
P0405：用水线阈值法分割图像
P0406：对矩阵进行四叉树分解
P0407：将图像分为文字和非文字的两个类别
P0408：形态学梯度检测二值图像的边缘
P0409：形态学实例——从PCB图像中删除所有电流线，仅保留芯片对象
- Procedure code explanation
P0401: Examines the picture with the Prewitt operator the edge
P0402: Examines the picture with the different sigma value LoG
operator the edge
P0403: Examines the picture with the Canny operator the edge
P0404: Picture threshold value division
P0405: Divides the picture with the water line threshold value
law
P0406: Carries on to the matrix four forks the tree
decomposition
P0407: Divides into the writing and the non- writing two
categories the picture
P0408: The morphology gradient examines two values pictures the
edge
P0409: The morphology example 鈻♀枴deletes all electricity
streamline from the PCB picture, only retains the chip object
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Size: 40960 |
Author: 李明 |
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Description: To carry on small comparison for he different threshold value under the image segmentation result, have to use many windows,namely for take a look at a different threshold value of slice segmentation ’s result at same window , the window be divided into many small window.But conduct a lone medical science slice observation, withdraw"interested area", need bilever value , even multi-threshold value, can carry on a single piece at fixed position to browse and segment into slices by selected threshold value .Multi-windows bilever threshold value methods can not only withdraw"interested area" of the medical science slice, but also take a look at a different threshold value of slice segmentation ’s result at same window-To carry on small comparison for he differe nt threshold value under the image segmentatio n result, many have to use windows, namely for take a look at a different threshold v alue of slice segmentation 's win at same result dow. the window be divided into many small window.Bu not conduct a lone medical science slice observat ion, withdraw "interested area," need bilever value, even multi-threshold value, can carry on a single piece at fixed position to b rowse and segment into slices by selected thres hold value. Multi-windows bilever threshold v alue methods can not only withdraw "interested area "of the medical science slice. but also take a look at a different threshold val ue of slice segmentation 's result at same windo w
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Size: 1024 |
Author: |
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Description: 本文对几何模型匹配方法进行了研究，提出了一套完整的人脸定位算法。在预处理部分，采用了特别的增强人脸特征与脸部皮肤之间对比度的方法及局域取阈值二值化方法，改进了预处理的效果。在图像分割部分，实现了经典的分合算法，并且使用成组算法改进了分合的效果。在人脸匹配部分，实现了基于眼睛和嘴的几何模型匹配，并对评价函数的构造进行了研究-geometric model of this matching method for the study and submit a complete set of facial positioning algorithm. In preprocessing, using a special facial features enhanced facial skin and the contrast between the methodology and obtain local threshold value of the two methods, improved the pretreatment results. Image segmentation, the realization of the classical division algorithm, and the use of group division algorithm improved results. Face in the match, based on the realization of the eyes and mouth of the geometric model matching and evaluation function of the tectonic study
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Size: 1020928 |
Author: |
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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.
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Size: 3072 |
Author: 陈语恬 |
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Description: 使用遗传算法对BP网络权值阈值进行优化，再用BP算法训练网络.-The use of genetic algorithm to the right of BP network to optimize the threshold value, and then BP algorithm for training the network.
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Size: 2048 |
Author: 黎明 |
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Description:
Motion detection results
If you double-click the Switch block so that the signal is connected to the SAD side, the Video Viewer block displays the SAD values, which represent the absolute value of the difference between the current and previous image. When these SAD values exceed a threshold value, the demo highlights the quadrant in red.
Note that the difference image itself may be viewed, in place of the original intensity image, along with the red motion highlighting, which indicates how the SAD metric works.
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Size: 11264 |
Author: radim.rh |
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Description: find the threshold value of the gray scale image.
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Size: 9216 |
Author: bakajet |
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Description: Thresholder mini program you can find the image threshold value
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Size: 40960 |
Author: Fatih |
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Description: 用labview实现图像的二值化，通过把图片转化为二维数组，通过和阈值比较把图像二值化-Achieved with labview binary image by the image into a two-dimensional array, and the threshold value by comparison to image binarization
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Size: 17408 |
Author: zhang |
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Description: 用MATLAB实现二层bp神经网络的计算。可以改变阈值和权值以改进算法，并可以将该方法推广到多层网络。-Using MATLAB to achieve the second floor bp neural network computing. Can change the threshold value and weight to improve the algorithm and the method can be extended to the multi-layer network.
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Size: 3072 |
Author: lyr |
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Description: Density Based Spatial Clustering of Applications of Noise
Uses a density-based notion of clusters to discover clusters of arbitrary shapes, in spatial databases
Key idea: for each object of a cluster, the neighborhood of a given radius contains at least a minimum number of data-objects. (i.e. the density of each cluster must exceed a threshold value)
Choosing the distance function is the critical parameter.
An object that appears to be part of Noise at present, might, at a later stage, be included into one of the clusters.
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Size: 4096 |
Author: nandish.hebbal |
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Description: This function returns the optimal threshold value using the 2-D Shannon entropy method
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Size: 1024 |
Author: ugur |
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Description: 图像阈值分割，为确定图像分割的最佳阈值，基于粒子群优化算法提出了一种多阈值图像分割方法-Image segmentation, image segmentation to determine the optimal threshold value, based on particle swarm optimization algorithm proposes a multi-threshold image segmentation
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Size: 1024 |
Author: |
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Description: 图像分割的阈值法综述，包含了最常用的几种阈值分割算法，希望对大家有用-Image segmentation threshold value method and reviewed in this paper
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Size: 183296 |
Author: 胡振邦 |
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Description: 关于图像处理的灰度阈值改变，图像处理里开始，适合初学者。-The image of gray threshold value change, image processing begins, is suitable for beginners.
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Size: 109568 |
Author: Suniya |
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Description: 本文介绍了两种图像区域分割方法，讨论了关于分割时最佳闽值选择的问题，除利用直方图确定阈值外，还介绍了利用方差确定阈值的途径。
关键词：图-This paper introduces two kind of image area segmentation method, talked about the best value selection fujian segmentation, besides the histogram threshold value determined outside, but also introduced the use of variance sure threshold way.
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Size: 222208 |
Author: lvxin |
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Description: 判断节点的全局阈值处理，判断节点的一种方法，可以进行别的处理时候使用-Global threshold value processing of the determination node, the determination node, a method can be use by other processing time
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Size: 1024 |
Author: xlw |
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