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基于C#上的EMGUCV编写的SIFT算法的代码，自己修改匹配库的文件图片即可，支持显示SIFT的关键点(EMGUCV C# based on SIFT algorithm written in code, make changes to the document image to match the library, support the display of the key points SIFT)

说明：  《视觉SLAM十四讲》高翔，完整版，前10章。对视觉定位，机器学习，深度学习有很大帮助(Gao Xiang, the complete version of vision slam 14 lectures, is very helpful for vision positioning, machine learning and deep learning)

现场指纹的方向场，四种方法比较OF_FOMFE，OF_manual，OF_proposed，OF_STFT(latent fingerprint orientation，orientation field estimation for latent fingerprint enhancement)

这是我根据别人的算法写的模拟停车场问题的c程序,原有算法有一些指针调用的错误！,现已改正()

寻找harris角点 利用ssd匹配角点(finding and matching harris points)

说明：  本代码可以载入超声图像，然后通过标注连通区域，自动截取最大连通区域对应的图像部分，达到去除四周标注的目的(After loading the ultrasonic image, the image part can be automatically cut off to remove the surrounding annotation)

说明：  把两幅有相互重叠部分的图片拼接在一起，合成一副大的图片(There is some overlap between the two pictures spliced together, synthesized a large picture)

说明：  sift和surf特征点提取，然后进行配准，通过ransac进行提纯(Sift and surf feature points are extracted, then registered and purified by RANSAC)

图像几何校正，把歪斜的图像校正成正视图。。(Perspective correction)

二维码PDF417编码和解码的源代码,可将它们修改后做成匹配的编码和解码对。(The source code of two-dimensional barcode PDF417 encoding and decoding, they can be modified to become a matched encoding and decoding. )