capture

美好的一个晚上从视觉工程开始 先来一个 阈值化 的程序和源代码 include "opencv2/video/tracking.hpp" #include "opencv2/imgproc/imgproc.hpp" #include "opencv2/highgui/highgui.hpp" #include <iostream> #include <ctype.h> #include<stdlib.h> #include<stdio.h> #include<math.h> #include<opencv2/opencv.hpp> #include<string.h> #include<vector> using namespace cv; using namespace std; #define windowname "程序窗口" Mat picture, img,emm, camera; int main() { VideoCapture capture(0); while (100) { capture >> camera; cvtColor(camera, picture, COLOR_RGB2GRAY);//转换为灰度图像 threshold(picture, img, 130, 255, 1); threshold(picture, emm, 130, 255, 0);

I have the following situation: In the code below, the method foo compiles while the method bar won't. At the method call entrySet (indicated in the code) the compiler says: Type mismatch: cannot convert from Set<Map.Entry<capture#1-of ? extends K,capture#2-of ? extends V>> to Set<Map.Entry<? extends K,? extends V>> Interestingly, the quickfix of Eclipse proposes to Change type of 's' to Set<Entry<? extends K, ? extends V>> which only changes the code because the quickfix is ignoring its own proposal and changing the type of s to Set<?> instead. I am using JDK1.8.0_51 and Eclipse 4.4.0. Maybe

Can use casperjs login to facebook but capture to png only show nav bar this my code: facebook.js casper.start("http://www.facebook.com/login.php", function(response) { if (this.exists('[name="lsd"]')) { this.page.evaluate(function(a,b) { document.querySelector("input[name='email']").value = a document.querySelector("input[name='pass']").value = b; document.querySelector("#login_form").submit(); console.log("Login submitted!"); },user_email,user_pass); } else { this.echo('[name="lsd"] not found', 'ERROR'); phantom.exit(); } this.capture('img/'+user_email+'_login.png'); }); casper.run(); please

I'm writing some wrapping code, where an external library calls a c++ function (using variadic templates and such). The crucial point is that the external library requires a c-function, which would normally be fine, as this is legal: LibraryFuncType fn = [](params) { ... } While I can easily do this by hand, I would like to automate the wrapping with something like: function_(context, "name", myfunc); To do this, I would need a function similar to: template <ReturnType, ParamTypes...> static void function_(Context &ctx, const std::string &name, std::function<ReturnType(ParamTypes...)> fn) {

I am now writing a program to capture screen and convert to video. I can successfully save the video if it is less than 10 seconds. But, if more than that, I received memory warning and application crash. I wrote this code as follow. Where am I missing to release data ? I would like to know how to do. -(void)captureAndSaveImage { if(!stopCapturing){ if (assetWriterInput.readyForMoreMediaData) { keepTrackOfBackGroundMood++; NSLog(@"keepTrackOfBackGroundMood is %d",keepTrackOfBackGroundMood); CVReturn cvErr = kCVReturnSuccess; CGSize imageSize = screenCaptureAndDraw.bounds.size; CGFloat

You would have thought that tere is a simple solution to this but there isn't :( My application needs to capture a stream from a USB/firewire (or whatever is the connection) connected camera (result would be a file like output.flv ). I would prefer that I can detect all connected cameras and choose which one to use (one or more at the same time --> one or more output files). Application has to be cross platform. Found libraries: Xuggle - not very good camera support. Good for manipulating over images and video. JMF - an old API but if I can use it, I will. I don't see a MAC OS X link on

I want to use the switch camera function. Currently I have Developed a Camera Object That working fine for back-camera but not working for front-camera. And I am unable to find a solution for switching between front and back cameras. Here is My Code..! public class MyCamera extends Activity implements SurfaceHolder.Callback, Camera.ShutterCallback, Camera.PictureCallback { Camera mCamera; SurfaceView mPreview; String filePath; @Override public void onCreate(Bundle savedInstanceState) { super.onCreate(savedInstanceState); setContentView(R.layout.camera_preview); mPreview = (SurfaceView)

Problem: sometimes in our zend controller we don't want the script to be output directly, but rather want the content of that script. One example: when we need the result html output of a view script be included in another structure like JSON or XML for processing in the client side. I found the result here at stack overflow, but not so quick since it was in a different context. I have been struggling with this for 2 days now. As it turned out it was very simple: // in our controllers' action method $this->_helper->layout()->setLayout('empty'); // disable layout $this->_helper->viewRenderer-