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PG_BOW_DEMO
图像的特征用到了Dense Sift,通过Bag of Words词袋模型进行描述,当然一般来说是用训练集的来构建词典,因为我们还没有测试集呢。虽然测试集是你拿来测试的,但是实际应用中谁知道测试的图片是啥,所以构建BoW词典我这里也只用训练集。
其实BoW的思想很简单,虽然很多人也问过我,但是只要理解了如何构建词典以及如何将图像映射到词典维上去就行了,面试中也经常问到我这个问题,不知道你们都怎么用生动形象的语言来描述这个问题?
用BoW描述完图像之后,指的是将训练集以及测试集的图像都用BoW模型描述了,就可以用SVM训练分类模型进行分类了。
在这里除了用SVM的RBF核,还自己定义了一种核: histogram intersection kernel,直方图正交核。因为很多论文说这个核好,并且实验结果很显然。能从理论上证明一下么?通过自定义核也可以了解怎么使用自定义核来用SVM进行分类。(Image features used in a Dense Sift, by the Bag of Words bag model to describe the word, of course, the training set is generally used to build the dictionary, because we do not test set. Although the test set is used as the test you, but who knows the practical application of the test image is valid, so I am here to build BoW dictionary only the training set.
In fact, BoW idea is very simple, although many people have asked me, but as long as you understand how to build a dictionary and how to image map to the dictionary D up on the line, and interviews are often asked me this question, do not know you all how to use vivid language to describe this problem?
After complete description of the image with BoW, refers to the training set and test set of images are described with the BoW model, the training of SVM classification model can be classified.
Apart from having to use the RBF kernel SVM, but also their own definition of a nuclear: histogram intersection kernel, histogram )
- 2011-11-01 17:01:09下载
- 积分:1
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echarts-master 各种图表 例子源码
echarts-master
- 2014-10-13下载
- 积分:1
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matlab_phase_retrieval-master
傅里叶振幅相位恢复工具箱,包括经典的ER、HIO算法(toolbox of Fourier magnitude phase retrieval in matlab, including ER, HIO algorithms)
- 2020-07-04 00:00:02下载
- 积分:1
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edge_detection
利用小波边缘检测算法实现对图像的边缘检测,效果良好。(Wavelet edge detection algorithm on edge detection with good results.)
- 2010-05-10 20:24:26下载
- 积分:1
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Median-filter
中值滤波是一种非线性数字滤波器技术,经常用于去除图像或者其它信号中的噪声
- 2013-06-03 17:32:58下载
- 积分:1
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mfile
简单写的一些图像预处理(灰度增强、小波高通滤波、LBP、迭代阈值分割、种子生长法etc)和RGB 、纹理(相关矩阵)特征提取(Write some simple image pre-processing (grayscale enhancement, wavelet high-pass filter, LBP, iterative threshold segmentation, seed growth method etc) and RGB, texture (correlation matrix) feature extraction)
- 2010-12-23 11:13:13下载
- 积分:1
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nsct_toolbox-zishiying
基于NSCT变换的自适应去噪,里面包含仿真图(image denoising)
- 2013-08-25 10:17:27下载
- 积分:1
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GAOSIYIDONGREYUAN
fluent软件UDF,焊接高斯移动热源。(weld heat source)
- 2015-10-20 15:54:08下载
- 积分:1
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WATERMARKING
基于差值的可逆水印算法源码,及详解说明。还包括一篇英文论文和该作者的一些理解和解释,希望对大家有帮助(Reversible watermarking algorithm based on difference of source code, and the Detailed Description. Also includes an English papers and some of the author' s understanding and interpretation, we hope to help)
- 2020-09-21 17:17:52下载
- 积分:1
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帧间差分法
说明: 带一个视频。路径要选择好才能运行,选择解压的此文件的路径。对运动视频的检测 返回一对坐标和大小,可识别运动物体。(The detection of moving video returns a pair of coordinates and sizes, which can identify moving objects.)
- 2020-04-27 20:31:48下载
- 积分:1