capture | 易学教程

iOS Still Image Capture Using CVVideoCamera (OpenCV)

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问题 I use opencv 2.4.9 for iOS and need help. I would like to capture with CVVideoCamera during filming high-resolution photos. I need the video camera for the process image method to add a mature document capture via edge detection. This works great as well but i need a photo of the recognized high-resolution photo of the document once the document has been detected. i found this http://code.opencv.org/svn/gsoc2012/ios/trunk/HelloWorld_iOS/HelloWorld_iOS/VideoCameraController.m this works with

Set capture device EmguCV

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问题 I´m using class Capture from EmguCV to take images from a WebCam. According to the documentation of the class (http://www.emgu.com/wiki/files/2.0.0.0/html/18b6eba7-f18b-fa87-8bf2-2acff68988cb.htm), Capture has 3 constructors. Using public Capture() its supposed to use the default camera and it works properly. As I saw in one of the examples, seems that public Capture(string fileName) //takes a video file as the source for the captures. The last constructor is public Capture(int camIndex) /

Set capture device EmguCV

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在element中使用@blur无效

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@blur.native="isVal"// 不好使 @blur.native.capture="isVal()" // 好使 VUE里面使用.capture是啥意思?  <div v-on:click.capture="doThis">...</div> 大佬的回答: 这个涉及到了javascript event，事件操作机制。我们看下javascript的标准的事件监听函数： element.addEventListener(<event-name>, <callback>, <use-capture>); 表示在 element 这个对象上面添加一个事件监听器，当监听到有 <event-name> 事件发生的时候，调用 <callback> 这个回调函数。 <use-capture> 这个参数，表示该事件监听是在“捕获”阶段中监听（设置为 true）还是在“冒泡”阶段中监听（设置为 false）。第三个参数就是你想要的答案。来源： CSDN 作者：每逢佳节掉三根. 链接： https://blog.csdn.net/qq_42043377/article/details/103602011

How to capture a webview to bitmap in Android?

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问题 I have a webview, and I need to scroll down to view all the content. Now, I want to capture the entire of the webview to a bitmap. I looked for many times. People suggested me use the function capturePicture() . However, this function is deprecated . So, what other methods I can use to do to reach my goal? Thanks all. 回答1: Android L, you need to call WebView.enableSlowWholeDocumentDraw() before creating any WebViews. That is, if you have any WebViews in your layout, make sure you call this

launch app, capture stdout and stderr in c++

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问题 How do I launch an app and capture the output via stdout and maybe stderr? I am writing an automated build system and I need to capture the output to analyze. I'd like to update the svn repo and grab the revision number so I can move the files in autobuild/revNumber/ if successful. I also would like to build using make and upload the compile text to my server for everyone to see the warnings and errors on a failed build. I can't find the system() function, but I found the CreateProcess()

Android > 4.0 : Ideas how to record/capture internal audio (e.g. STREAM_MUSIC)?

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问题 Some months ago, with Android ICS (4.0), I developed an android kernel module which intercepted the "pcmC0D0p"-module to fetch all system audio. My target is to stream ALL audio (or at least the played music) to a remote speaker via AirPlay. The kernel module worked, but there where several problems (kernel-versions, root-privileges etc.) so I stopped working on this. Now, we have Android 4.1 and 4.2 and I have new hope! Who has an idea how to capture the audio in Android? I had following

Get Visible Signature from a PDF using PDFBox?

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问题 Is it possible to extract the visible signature (image) of an signed PDF with the OSS library PDFBox? Workflow: list all signatures of a file show which signatures include a visible signature show which are valid extract images of signatures (need to extract correct image for each signature) Something in oop style like following would be awesome: PDFSignatures [] sigs = document.getPDFSignatures() sig[0].getCN() ... (Buffered)Image visibleSig = sig[0].getVisibleSignature() Found class

Track a click on a flash movie (object / embed) with jQuery

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问题 I am making a dynamic banner system which can handle img banners, as well as flash banners done with object/embed. The entire site makes heavy use of jQuery, including handling the 'click' events. This obviously isn't a problem when it comes to tracking the clicks on the image itself (i track the click on the parent DIV tag. However, it fails when the advert is an SWF, as I suspected it would. Is there a jQuery workaround that would allow me to capture a click on a Flash element with the DOM?

C# trying to capture the KeyDown event on a form

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问题 I am creating a small game, the game is printed onto a panel on a windows form. Now i want to capture the keydown event to see if its the arrow keys that has been pressed, the problem however is that i can't seem to capture it. Let me explain, on the form i have 4 buttons and various other controls and if the user for instance press one of the buttons (to trigger a game event) then the button has focus and i can't capture the movements with the arrow keys. I tried something like private void