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Pudn
A filter bank structure that can deal effectively with piecewise smooth images with smooth contours, was proposed by Minh N Do and Martin Vetterli. The resulting image expansion is a directional multiresolution analysis framework composed of contour segments, and thus is named contourlet. This will overcome the challenges of wavelet and curvelet transform. Contourlet transform is a double filter bank structure. It is implemented by the pyramidal directional filter bank (PDFB) which decomposes images into directional subbands at multiple scales. In terms of structure the contourlet transform is a cascade of a Laplacian Pyramid and a directional filter bank. In essence, it first use a wavelet-like transform for edge detection, and then a local directional transform for contour segment detection. The contourlet transform provides a sparse representation for two-dimensional piecewise smooth signals that resemble images.
- 2013-03-11 17:11:17下载
- 积分：1
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Q
说明： 本文以室内、外不同空间的人数统计为背景，研究基于图像的人员计数技术，对某时段内进出摄像机视野中指定区域的人数，或指定区域内在景人数进行统计。主要研究内容有以下几点：
（1）人员计数方案论证：本文分析对比了不同人员计数算法，研究分析了基于像素、 基于Hough变换的人员计数算法的优缺点。
（2）基于像素统计的人员计数系统实现：①分别采用近似中值背景模型和高斯混合背景模型提取前景图像；②采用基于HSV颜色空间变换的方法对前景中的阴影进行抑制；③用前景像素数除以人数得到一个人的像素平均值，在已知图像中前景像素数的情况下，可对人数进行估计。
（3）基于Hough变换的人员计数系统实现：①根据人头顶部轮廓近圆的特征,采用Sobel算子提取图像边缘,得到目标轮廓；②设置人员检测计数区，利用Hough变换进行圆检测；③对目标进行跟踪，并且进行有效性判断，记录有效目标；④判断行人是否跨线及跨线方向，实现过往行人的双向人数统计，并对人头进行标记。
(In this paper, indoor outside the different number of spatial statistical background image based on studies of people counting technology, the number of designated areas within some period of time and out of the camera view, the number of designated areas or inner view statistics. The main contents are as follows:
(1) people counting demonstration program: In this paper compares different people counting algorithm analysis based on pixel count algorithm based on the advantages and disadvantages personnel Hough Transform.
(2) based on pixel count of people counting system achieve: ① were used to approximate the value of the background model and a Gaussian mixture background model extraction of the foreground image ② the method of the HSV color space conversion based on the foreground shadow suppressed ③ foreground pixels divided by the average number of pixels to obtain a person s image at a known number of pixels in the foreground of the case, th)
- 2016-05-08 09:37:42下载
- 积分：1
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Character-graphics
给出图形，以字符拼该图形，并生成文本文件(Character graphics)
- 2012-01-05 22:44:19下载
- 积分：1
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Levenberg-Marquardt Method
最优化 LM算法, 实现二次函数为目标函数的非线性优化(L-M Optimization method)
- 2019-01-07 14:58:25下载
- 积分：1
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gm2trellis
This program is used to compute stbc using trelis code
- 2010-12-13 17:43:31下载
- 积分：1
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sila
Using MoM for analysis Radar cross section RCS
- 2021-04-04 21:39:04下载
- 积分：1
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FIR_Low
基于Matlab开发环境的FIR数字低通滤波器设计的源代码。(Based on the development environment of Matlab FIR digital low-pass filter design source code.)
- 2014-09-29 21:04:59下载
- 积分：1
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BER
matlab和optisystem联合调试用的误码率计算程序，经过测试，使用简单。(matlab and optisystem debug the error rate calculation procedure, tested, simple to use.)
- 2012-04-23 15:42:04下载
- 积分：1
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Optical-path-length-ratio
不同光程比值对色散关系的影响，光子晶体中光程的比值定义为高低折射率所对应的光程的比值，计算公式为定义为
(Effects of different length ratio on the dispersion relation)
- 2013-05-04 21:28:56下载
- 积分：1
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matlab_lfm
说明： 线性调频信号在雷达上的实现，文中给出了设计过程，具有很好的参考价值(LFM radar signals the realization of paper gives the design process, with a very good reference value)
- 2009-07-27 14:50:07下载
- 积分：1
