tracking

问题 I am looking for an efficient way to find out if a resource (mostly a drawable) is used in Java or in an XML file. The problem is, that on my current project the drawables are changed often and now I have some drawables, which might never be used. Is there a tool/way to find those unused drawables without search each filename in the whole project? 回答1: I wrote a tool based on python to solve this problem. As this is not the place to share it directly, I created a project page which is now

问题 Yes, I know you have to embed the google analytics javascript into your page. But how is the collected information submitted to the google analytics server? For example an AJAX request will not be possible because of the browsers security settings (cross domain scripting). Maybe someone had already a look at the confusing google javascript code? 回答1: When html page makes a request for a ga.js file the http protocol sends big amount of data, about IP, refer, browers, language, system. There is

问题 I'm setting up a iPhone tracking system for my friends, so they can submit their location to my website by their iPhone, anywhere, anytime - by WiFi or cellular data. The website will use Google Maps for their coordination's so that my other friends can track where they are, however, it is the accuracy of the IP to coordinates to Google Maps is what I'm concerned about, exactly how accurate is it to use Google Maps that would track down the locations by an IP address? I was thinking about 95%

问题 Many scientists have published papers documenting how devices connected via WLAN can be tracked by measuring its Signal Strength, Time Of Arrival, Round Trip Time, etc. Any idea how I can access these values in Windows using any .NET API? Or do you know of software SDKs already available for location tracking? 回答1: hello for WIndows 7 this is a good code wich can detect all AP with MAC adress RSSI SSID : using System; using System.Collections.Generic; using System.ComponentModel; using System

问题 I have seen the service like spypig.com placing a small image in the email and tracking when it is opened and from where. They track city, country, IP address etc. How is this done? How do we know when the mail is opened? And how is the image generated? How is the IP address detected and how is it possible to know location from it? 回答1: Basically, in the HTML body of your email, there will be an <img> tag that would look like this : <img src="http://www.yoursite.com/tracker.php?id=123456" alt

问题 I use this to functions as a base of my tracking algorithm. //1. detect the features cv::goodFeaturesToTrack(gray_prev, // the image features, // the output detected features max_count, // the maximum number of features qlevel, // quality level minDist); // min distance between two features // 2. track features cv::calcOpticalFlowPyrLK( gray_prev, gray, // 2 consecutive images points_prev, // input point positions in first im points_cur, // output point positions in the 2nd status, //

问题 Litmus released an email analytics service last month (may 2010). See here: http://litmusapp.com/email-analytics They boast a very cool "read rate" tracking: they can track normal reads, Skims, and Glanced/Deleted. How can they track skims and glanced/deleted? This to me seems impossible :) They also track forwards and prints. Prints are easy (they include a css @media print query with a bg image). But forwards? I think this might be a combo between subsequent opens and different IPs

问题 Problem: The user can choose how long and when start to track your locaton (Like today from 08:00 to 16:00). So during this interval my application will listen for the location every 5 minutes (this time can be changed, it's a user's preference). What I'm thinking: Making a service to be running and listenning for coming of the GPS or network locations during the time interval definned by the user. Problem: The service can be removed for running a long time? I need to registers listeners to

问题 A guy posted this tutorial about object tracking using Kalman filter. Many people rated high star so it is not a fault/wrong tutorial. However, a guys posted the following question:" In this code you have done detection in every frame and this output is provided as the input to the kalman filter.So background subtraction and kalman filter will give similar results.So please can you explain the use of kalman filter here. " I have the same thought with him. Can anybody explain the use of Kalman

问题 I was looking into Kanade Lucas Tomasi Tracker in the following link. However, I was wondering how the KLT recognizes the new people have entered scene. I know that there is replenishing of bounding boxes every 10 frames, but in case a person say entered in the 5th frame. Does it mean the for his first 5th consecutive frames the person is not captured? If I understand that this threshold can be varied, however there will still be cases when this will happen whats so ever. Can someone explain