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• How to recognise vehicle licence / number plate (ANPR) from an image?

  - by Ryan ONeill

  Hi all, I have a web site that allows users to upload images of cars and I would like to put a privacy filter in place to detect registration plates on the vehicle and blur them. The blurring is not a problem but is there a library or component (open source preferred) that will help with finding a licence within a photo? Caveats; I know nothing is perfect and image recognition of this type will provide false positive and negatives. I appreciate that we could ask the user to select the area to blur and we will do this as well, but the question is specifically about finding that data programmatically; so answers such as 'get a person to check every image' is not helpful. This software method is called 'Automatic Number Plate Recognition' in the UK but I cannot see any implementations of it as libraries. Any language is great although .Net is preferred. Thanks in advance Ryan

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• How would you communicate with aliens as a computer scientist?

  - by Pyrolistical

  Let's say aliens arrive on Earth and instead of just sending mathematicians and linguistic experts governments around the work decide to send an expert of major field. After a quick round of sorting you are paired up with an alien computer scientist. Given you don't understand each others language how would you using computer science to start the ground work of communication? eg. We know binary is universal, but not the way we write it. The symbols are not universal nor is the the direction we write it (MSB vs LSB and left vs right) Assume aliens are "similar" to us physically it won't impede visual communication.

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• IAR Embedded Workbench - setting endian-ness of variable

  - by Seidleroni

  I'm using IAR Embedded Workbench for ARM (ARM7TDMI-S) and the majority of my work is done using little-endian format. However, I saw in the manual that I can do something like : __big_endian int i, j; to declare those two variables as big endian (while the rest of the app as little endian). This seems like a fantastic feature, but when I try to compile, I always get the errror: Error[Pa002]: the type attribute "__big_endian" is not allowed on this declaration. The big endian line above is copied directly from the manual, but it does not work. This is a great feature of the compiler and would make life a big easier. Any ideas how to get it working? I have my language conformance set to 'Allow IAR extensions' on the C/C++ Compiler options tab on the IDE options.

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• Passing var from php to javascript

  - by marc-andre menard

  I try to do something pretty strait... getting php value to javascript here is the page here is the code.. <script language="javascript"> <?php $imagepath = $_REQUEST["path"]; ?> var whatisthepath = <?php $imagepath; ?> alert (whatisthepath); </script> ALWAYS getting UNDEFINE.... why ?

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• Nginx is sending proxy saved conent in gzip format

  - by Sandeep Manne

  Hi I used config given in this http://www.webtatic.com/blog/2008/04/page-level-caching-with-nginx/ for page level caching of php content the problem is that the cached page is saving in gzip format and it returning same gzip content to browser. I need the o/p like this "12:15:37 12:15:47" (Its coming for 1st time when the page is not cached) after that if request is resend it is returning ‹??????34²26±24à23Œ¸¸?`Î9”??? (gzip response as I tried zcat its returning fine) Response Headers Server nginx/0.8.34 Date Wed, 17 Mar 2010 07:04:58 GMT Content-Type text/html Last-Modified Wed, 17 Mar 2010 07:04:20 GMT Transfer-Encoding chunked Connection keep-alive Vary Accept-Encoding Expires Wed, 17 Mar 2010 07:04:58 GMT Cache-Control max-age=0 Content-Encoding gzip Request Headers Host localhost User-Agent Mozilla/5.0 (X11; U; Linux i686; en-US; rv:1.9.0.18) Gecko/2010021501 Ubuntu/9.04 (jaunty) Firefox/3.0.18 GTB6 Accept text/html,application/xhtml+xml,application/xml;q=0.9,/;q=0.8 Accept-Language en-us,en;q=0.5 Accept-Encoding gzip,deflate Accept-Charset ISO-8859-1,utf-8;q=0.7,*;q=0.7 Keep-Alive 300 Connection keep-alive

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• Run Exchange Management Shell cmdlets from Visual Basic/C#/.NET app

  - by nowarninglabel

  Goal: Provide a web service using Visual Basic or C# or .NET that interacts with the Exchange Management Shell, sending it commands to run cmdlets, and return the results as XML. (Note that we could use any lanaguage to write the service, but since it is a Windows Box and we have Visual Studio 2008, it seemed like easiest solution would be just use it to create a VB/.NET web service. Indeed, it was quite easy to do so, just point and click.) Problem: How to run an Exchange Management Shell cmdlet from the web service, e.g, Get-DistributionGroupMember "Live Presidents" Seems that we should be able to create a PowerShell script that runs the cmdlet, and be able to call that from the command line, and thus just call it from within the program. Does this sound correct? If so how would I go about this? Thanks. Answer can be language agnostic, but Visual Basic would probably be best since that is what I loaded the test web service up in.

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• WCF Service Library Reference in a Web Form (asp.net)

  - by Abu Hamzah

  i am not sure if this is the correct way of doing but i read that you not suppose to have a WCF Service Library reference in your web form project rather you add endpoints to your web.config, is that true? here is what i have done: 1) create a WCF service library project 2) create a simple service called "MyService.svc" WebForm: 1) Create a web project 2) create a WCF Service and in it i have this code <%@ ServiceHost Language="C#" Service="WCFJQuery.ContactBLL.Implementation.ContactUs" Factory="System.ServiceModel.Activation.WebScriptServiceHostFactory" %> 3) right click on the web proejct and "Add Reference" and add teh MyService.dll reference from WCF service library project. is this something how you suppose to do?

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• What container is easiest for combining JPEGS and MP3s as video?

  - by Ole Jak

  So I have N (for example, 1000) JPEG frames and 10*N ( for example, 100) seconds of MP3 sound. I need some container for joining them into one video file (at 10 frames/second) (popular containers like FLV or AVI or MOV are better). So what I need is an algorithm or code example of combining my data into some popular format. The code example should be in some language like C#, Java, ActionScript or PHP. The algorithm should be theoretically implementable with ActionScript or PHP. Can any one, please help me with that?

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• iPhone development time...

  - by Tisch

  I have been asked to develop a relatively simple iPhone application. However, it would be my first application. I am a fairly competent programmer and can turn my skills to a new language fairly quickly... what my question is, is... How long has it taken some of you guys to make your first iPhone application and what was your experience like? Also, if you can say this sort of information, how much did you charge for it?! Thanks in advance. Kindest Regards Tom

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• GDI fast scroll

  - by genesys

  Hi! I use GDI to create some custom textwidget. I draw directly to the screen, unbuffered. now i'd like to implement some fast scrolling, that simply pixelshifts the respective part of the framebuffer (and only redraws the newly visible lines). I noticed that for example the rich text controls does it like this. If i use some GDI drawing functions to directly draw to the framebuffer, over a rich text control, and then scroll the rich text, it will also scroll my drawing along with the text. so i assume the rich text simply pixelshifts it's part of the framebuffer. I'd like to do the same, but don't know how to do so. Can someone help? (independant of programming language)) thanks!

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• Databinding to type double - decimal mark lost

  - by user1277327

  I have a project where I'm databinding a gridview to a list, where one column is databound to a gridview. The problem I have is that with the double being 5.5 on one computer it appears as 5.5 in the gridview. But on another it looks like 55, the decimal mark dissapears. So 3.14 will look like 314 etc. The error occurs with the following code: myDatagrid.ItemsSource = someList; Binding binding = new Binding("DoubleValue"); myColumnInDatagrid.Binding = binding; I've also tried using a very simple valueconverter, that just return the double, and parsed it in ConvertBack. I'm pretty new to WPF so I'm sorry if I've made some obvious mistakes, I just don't understand why it works on one computer but not on the other. Perhaps it should be noted that both of the computers use the same operating system, with the same language settings (afaik at least).

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• I have some questions about building an AIR app for use with a connected projector.

  - by knuckfubuck

  For an app I'm working on, I'd like to have a control panel window and a video output window to use for projecting video with an attached projector. I have built many Flash applications but this will be my first time using AIR so I have some questions. Is it possible to have two seperate windows as part of one AIR application? Can one of the windows (the video output) be in full-screen mode while the other window stays normal? How does AIR do with playing local video? Will there be crashes or choppy playback? Is there a better language option for what I'm trying to accomplish?

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• Recommendations for 'C' Project architecture guidelines?

  - by SiegeX

  Now that I got my head wrapped around the 'C' language to a point where I feel proficient enough to write clean code, I'd like to focus my attention on project architecture guidelines. I'm looking for a good resource that coves the following topics: How to create an interface that promotes code maintainability and is extensible for future upgrades. Library creation guidelines. Example, when should I consider using static vs dynamic libraries. How to properly design an ABI to cope with either one. Header files: what to partition out and when. Examples on when to use 1:1 vs 1:many .h to .c Anything you feel I missed but is important when attempting to architect a new C project. Ideally, I'd like to see some example projects ranging from small to large and see how the architecture changes depending on project size, function or customer. What resource(s) would you recommend for such topics?

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• JSF RuntimeException: Cannot find FacesContext

  - by Sunny Mate

  When i write <h:outputText value="Login Name"/> tag in my jsp i am getting "Cannot find FacesContext" error , with out that tag my jsp working fine here is my JSP <%@ page language="java" import="java.util.*" pageEncoding="ISO-8859-1"%> <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN"> <html> <%@ taglib uri="http://java.sun.com/jsf/html" prefix="h" %> <%@ taglib uri="http://java.sun.com/jsf/core" prefix="f" %> <body> Login Name <input type="text" value=""/><br> **<h:outputText value="Login Name"/>** Password<input type="password" value=""/><br> <input type="submit" value="Login"> </body> </html>

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• Protect Plesk login page from search engine eyes

  - by Iman Samizadeh

  Hi Folks, I was wondering if would it be possible to protect the "https://www.DOMAIN.com:8443" URL from search engines listing perhaps using the htaccess to redirect the 8443 port from "DOMAIN" to elsewhere? This is the VZPP Plesk - Login Login to Plesk. Please enter your login information. Username. Password. Interface Language. User Default, ENGLISH (United States), GERMAN (Germany) ... https://www.DOMAIN.com:8443/ - Many Thanks.

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• Quartz2d vector images vs OpenGL vector description?

  - by tbarbe

  How big of a difference is the description language of Quartz2d to OpenGL ES? It seems they are similar in description power... except that Quartz is mostly 2d and that OpenGL is out of the box 3d ( but can be made 2d focused ). Are the mappings from 2dQuartz to 2d OpenGL ES that different? Im sure there must be differences in some specific features that might be handled differently on one vs another... but to do a translator? Anyone have experience with both OpenGL and Quartz2d have some insights?

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• Overview of PHP shorthand

  - by James Simpson

  I've been programming in PHP for years now, but I've never learned how to use any shorthand. I come across it from time to time in code and have a hard time reading it, so I'd like to learn the different shorthand that exists for the language sot hat I can read it and start saving time/lines by using it, but I can't seem to find a comprehensive overview of all of the shorthand. A Google search pretty much exclusively shows the shorthand for if/else statements, but I know there must be more than just that. By shorthand, I am talking about stuff like: ($var) ? true : false;

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• Why is memory management so visible in Java VM?

  - by Emil

  I'm playing around with writing some simple Spring-based web apps and deploying them to Tomcat. Almost immediately, I run into the need to customize the Tomcat's JVM settings with -XX:MaxPermSize (and -Xmx and -Xms); without this, the server easily runs out of PermGen space. Why is this such an issue for Java VMs compared to other garbage collected languages? Comparing counts of "tune X memory usage" for X in Java, Ruby, Perl and Python, shows that Java has easily an order of magnitude more hits in Google than the other languages combined. I'd also be interested in references to technical papers/blog-posts/etc explaining design choices behind JVM GC implementations, across different JVMs or compared to other interpreted language VMs (e.g. comparing Sun or IBM JVM to Parrot). Are there technical reasons why JVM users still have to deal with non-auto-tuning heap/permgen sizes?

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• Using PHP to place database rows into an array?

  - by Hamed Szilazi

  I was just wondering how i would be able to code perform an SQL query and then place each row into a new array, for example, lets say a table looked like the following: $people= mysql_query("SELECT * FROM friends") Output: | ID | Name | Age | --1----tom----32 --2----dan----22 --3----pat----52 --4----nik----32 --5----dre----65 How could i create a multidimensional array that works in the following way, the first rows second column data could be accessed using $people[0][1] and fifth rows third column could be accessed using $people[4][2]. How would i go about constructing this type of array? Sorry if this is a strange question, its just that i am new to PHP+SQL and would like to know how to directly access data. Performance and speed is not a issue as i am just writing small test scripts to get to grips with the language.

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• C# Crypto API examples

  - by Gearoid Murphy

  Hello, I'm looking for examples + information on how to extract certificate information from the windows certificate store and perform operations like verifying signatures using the retrieved certificates. The API documentation for C# in this regard is quite poor, with many of the entries in msdn marked with "This language is not supported, or no code example is available.", I'm sorry I can't be more specific, I haven't done any programming using cryptographic api's. The particular certificate will be provided via a USB token. Any help or pointers would be much appreciated, thanks.

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• Target .Net Framework 4 in t4 templates

  - by HeavyWave

  We have a template that goes like this <#@ template language="C#v3.5" #> <#@ assembly name="System.dll" #> <#@ assembly name="System.Core.dll" #> <#@ assembly name="System.Data.Linq.dll" #> It compiles and runs on .Net 3.5, but after we have switched to .Net 4 the template has stopped working, so I've tried using answer from here, but I get errors like this Error 99 Compiling transformation: Metadata file 'System.Data.Linq.dll' could not be found How do I correctly modify the template to run on .Net Framework 4?

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• How to pass email from one form to another page's form with javascript

  - by zac

  I am trying to have an email signup form on one page populate the email block on another page by passing it through the url and pulling it out with document.write. The first form is something like: <form action="/sign-up"> <input type="text" name="passEmail"><input type="submit"></form> And the recieving form is like : <form name="theForm"> <input type='text' name='email'></form> And I am trying a script like this <SCRIPT LANGUAGE="javascript"> var locate = window.location document.theForm.email.value = locate var text = document.theForm.email.value function delineate(str) { theEmail = str.indexOf("=") + 1; return(str.substring(theEmail)); } document.write(delineate(text)); </SCRIPT> Instead of pulling the email after the = in the url it is pulling the entire url. Can someone help me accomplish this?

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• How to define enum in as3?

  - by Nava Carmon

  Is there a way to define an enum in AS3 in a way we do it in other languages? I can define constants with defined values like that: private const CONST_1:int = 0; private const CONST_2:int = 1; private const CONST_3:int = 2; and so on. If I want to insert some other constant between 3 these I need to move all values like that: private const CONST_1:int = 0; private const CONST_2:int = 1; private const CONST_2A:int = 2; private const CONST_3:int = 3; while in other language I would end up with only adding a new member to enum closure like that: enum { CONST_1 = 0, CONST_2, CONST_2A, CONST_3 } MyConstEnum; Does AS3 has something similar? Thanks

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• How to use Firebug's debugger functions?

  - by TK

  I don't have an experience with any debugger in any language, but I recently found some videos showing Firebug. I'm now playing with Firebug with a script I included an error with. What I understand now is: I can set a breakpoint, which is shown as a red circle. Firebug stops at the breakpoint and gives me 4 options (Continue, Step Into, Step Over and Step Out). What I don't understand are: What is the difference between the 4 options (i.e., Continue, Step Into, Step Over and Step Out)? To me, Step Over is sometimes similar to Step Into... I could be wrong here. I would be grateful if you could explain the differences of the 4 options.

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• Should I update an application when a used framework release a new version?

  - by Alex

  I have an application that use several libraries and frameworks, should I update my application to use the latest version of those frameworks when a new stable version is available? For example, migrate from python 2.x to python 3.x, or from spring 2.5 to spring 3.0, but the question es very general, not language specific. If I keep the application updated to use the latest stable frameworks versions then I will have new features available in case I need them. If I don't, then may be in a future I will need to do the update and it will be a lot of work to update the application. Is there any best practice about this?

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