在iPhoneSDK中检测文档的边缘

问题描述

我看起来像附件图片，如何在iPhoneSDK中实现这一点。

任何人都可以建议我一些开源API 或者算法代码用于检测文档捕获图像的角落。

一些如何，我得到了一个名为 OpenCV 非常认可

在第10-6页，有一组轮廓检测功能：

  CvContourScanner cvStartFindContours（IplImage * img，
 CvMemStorage *存储，
 int headerSize，
 CvContourRetrievalMode模式，
 Cv ChainApproxMethod方法）; 
 
 int cvFindContours（IplImage * img，
 CvMemStorage * storage，
 CvSeq ** firstContour，
 int headerSize = sizeof（CvContour），
 CvContourRetrievalMode mode = CV_RETR_LIST，
 CvChainApproxMethod method = CV_CHAIN_APPROX_SIMPLE）; 
  

我希望有所帮助。

您的问题的目标是，如何在ios / iPhone上使用OpenCV，然后您可以查看以下网站。准备好的XCode项目文件，用于iOS项目：

另一个可以在此处找到包含非常有价值信息的StackOverflow帖子：

I am looking something like attached image, How can I implement this in iPhoneSDK.

Can anybody suggest me some open source API or Algorithm Code to detect the corners of captured image of a document.

Some How, I got an open source API called OpenCV which recognize the Human Face very well. I want to use the same API if possible.Now the problem Is how can I make the changes in those static libraries according to my requirement to Scan the Document edges.Alternatively,

how to detect for the square/rectangle object in the captured image ?

解决方案

When you are already using openCV you might know the Reference Manual:

http://www.sciweavers.org/books/opencv-open-source-computer-vision-reference-manual

On page 10-6 there is a reference to the set of contour detection functions:

CvContourScanner cvStartFindContours(IplImage* img,
                                     CvMemStorage* storage,
                                     int headerSize,
                                     CvContourRetrievalMode mode,
                                     CvChainApproxMethod method );

int cvFindContours( IplImage* img,
                    CvMemStorage* storage,
                    CvSeq** firstContour,
                    int headerSize=sizeof(CvContour),
                    CvContourRetrievalMode mode=CV_RETR_LIST,
                    CvChainApproxMethod method=CV_CHAIN_APPROX_SIMPLE );

I hope that helps.

When the target of your question was, how to use OpenCV on ios/iPhone then you can have a look at the following Sites. Ready made XCode project files for use in an iOS project:

http://www.eosgarden.com/en/opensource/opencv-ios/overview/

Another StackOverflow post with very valuable information can be found here:

iPhone and OpenCV

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