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  • Gaussian filter in Matlab

    - by md86
    Does the 'gaussian' filter in MatLab convolve the image with the Gaussian kernel? Also, how do you choose the parameters hsize (size of filter) and sigma? What do you base it on? etc

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  • Client Side pagination with jQuery

    - by TheNone
    I have tried to write a script for pagination contents of an element with jQuery: <script type="text/javascript"> $(document).ready(function(){ var per_page = 2; var num_item = $('#en1').children().size(); var num_page = Math.ceil(num_item/per_page); $('#current_page').val(0); $('#per_page').val(per_page); var navigation_html = ''; var current = 0; while(num_page > current){ navigation_html += '<a class="page_link" href="javascript:paginate(' + current +')" longdesc="' + current +'">'+ (current + 1) +'</a>'; current++; } $('#page_navigation').html(navigation_html); $('#page_navigation .page_link:first').addClass('active_page'); $('#en1').children().css('display', 'none'); $('#en1').children().slice(0, per_page).css('display', 'block'); }); function paginate(page_num){ var per_page = parseInt($('#per_page').val()); start = page_num * per_page; finish= start + per_page; $('#en1').children().css('display', 'none').slice(start, finish).css('display', 'block'); $('.page_link[longdesc=' + page_num +']').addClass('active_page').siblings('.active_page').removeClass('active_page'); $('#current_page').val(page_num); } </script> http://jsfiddle.net/kqfyL/9/ This script paginate the contents of element by id "en1". I want to paginate 4-5 element (en2, en3, ...). When I insert code inside o document ready in a function, pagination doesnt work: function init(myId){ var ID = document.getElementById("myId"); var per_page = 6; var num_item = $(ID).children().size(); var num_page = Math.ceil(num_item/per_page); $('#current_page').val(0); $('#per_page').val(per_page); var navigation_html = ''; var current = 0; while(num_page > current){ navigation_html += '<a class="page_link" href="javascript:paginate(' + current +')" longdesc="' + current +'">'+ (current + 1) +'</a>'; current++; } $('#page_navigation').html(navigation_html); $('#page_navigation .page_link:first').addClass('active_page'); $('#ID').children().css('display', 'none'); $('#ID').children().slice(0, per_page).css('display', 'block'); } init(en1); What is wrong in init function? Thanks in advance

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  • Cannot change UIImageView frame in a custom table cell.

    - by jkally
    I have a custom table cell. In it I have put (via the IB) an image view of a certain frame In 'cellForRowAtIndexPath', under certain conditions, I would like to modify the frame of this UIImageView, so I write something like: UIImageView *imgv = (UIImageView *)[cell viewWithTag:1]; CGRect r = CGRectMake(20.0, 20.0, 10.0, 10.0); imgv.frame = r; But nothing expected happens (The frame does move a little though not to where I want, but doesn't change its size at all);

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  • Can I prevent IMAP from grabbing files over X mb using PHP?

    - by mike
    I'm building a little script that will connect to an IMAP account and grab the content of the email and also the attachments. It works well for the most part, but when a really large file comes in, it causes the script to time out. Is there any way that I can check the file size before trying to grab it? I think that would be the simplest solution. Otherwise, I may have to upgrade to a server that has more memory.

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  • [c#] SoundPlayer.PlaySync stopping prematurely

    - by JeffE
    I want to play a wav file synchronously on the gui thread, but my call to PlaySync is returning early (and prematurely stopping playback). The wav file is 2-3 minutes. Here's what my code looks like: //in gui code (event handler) //play first audio file JE_SP.playSound("example1.wav"); //do a few other statements doSomethingUnrelated(); //play another audio file JE_SP.playSound("example2.wav"); //library method written by me, called in gui code, but located in another assembly public static int playSound(string wavFile, bool synchronous = true, bool debug = true, string logFile = "", int loadTimeout = FIVE_MINUTES_IN_MS) { SoundPlayer sp = new SoundPlayer(); sp.LoadTimeout = loadTimeout; sp.SoundLocation = wavFile; sp.Load(); switch (synchronous) { case true: sp.PlaySync(); break; case false: sp.Play(); break; } if (debug) { string writeMe = "JE_SP: \r\n\tSoundLocation = " + sp.SoundLocation + "\r\n\t" + "Synchronous = " + synchronous.ToString(); JE_Log.logMessage(writeMe); } sp.Dispose(); sp = null; return 0; } Some things I've thought of are the load timeout, and playing the audio on another thread and then manually 'freeze' the gui by forcing the gui thread to wait for the duration of the sound file. I tried lengthening the load timeout, but that did nothing. I'm not quite sure what the best way to get the duration of a wav file is without using code written by somebody who isn't me/Microsoft. I suppose this can be calculated since I know the file size, and all of the encoding properties (bitrate, sample rate, sample size, etc) are consistent across all files I intend to play. Can somebody elaborate on how to calculate the duration of a wav file using this info? That is, if nobody has an idea about why PlaySync is returning early. Of Note: I encountered a similar problem in VB 6 a while ago, but that was caused by a timeout, which I don't suspect to be a problem here. Shorter (< 1min) files seem to play fine, so I might decide to manually edit the longer files down, then play them separately with multiple calls.

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  • Append some HTML into the HEAD tag?

    - by Alex
    Hi! I want to add some style to head tag in html page using javascript. var h = document.getElementsByTagName('head').item(0); h.innerHTML += '<style>a{font-size:100px;}</style>'; But when I run this code in IE8 I see this error message: Could not set the innerHTML property. Invalid target element for this operation. Any ideas?

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  • Rendering CALayer in context uses large amounts of memory

    - by Otium
    I am taking a snapshot of a UIWebView layer, but when I render the webview's layer in the current context my app uses 10mb more memory, and I don't think that should be right. Here is my current code: CGSize imageSize = self.bounds.size; UIGraphicsBeginImageContextWithOptions(imageSize, YES, 0); CGContextRef context = UIGraphicsGetCurrentContext(); [self.layer renderInContext:context]; _snapshot = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext();

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  • ModalPopupExtender with thmbnail (problem in javascript)

    - by arny
    this is the code,it is not working in Firefox,Chrome,to show full size image unless user click on image for couple of times, I basically replace the thmbnail image with full size image in javascript, here is my code, TransitionDuration="50" FramesPerSecond="40" RequireOpenedPane="false" SelectedIndex="-1" SuppressHeaderPostbacks="true" HeaderCssClass="accordionHeader" ContentCssClass="accordionContent" OnItemDataBound="Accordion1_ItemDataBound" OnItemCommand="Accordion1_ItemCommand" ' ' Width="90px" Height="70px" onclick="togglePopupImage2(this);" CssClass="thumbnail" BorderColor="Navy" BorderStyle="Solid" BorderWidth="1" <table> <tr> <td style="background-color: #2E4d7B; height: 15px; color: White; font: arial bold 12px; padding: 5px"> <label id="imgText" runat="server"> </label> </td> </tr> <tr> <td> <asp:Image ID="imgPopup" CssClass="imgpopup" runat="server" /> </td> </tr> <tr> <td align="center" style="background-color: #2E4d7B; height: 25px;"> <asp:Button ID="btnCancel" runat="server" Text="Close" CssClass="closeimage"/> </td> </tr> </table> </asp:Panel> And javascript code: function togglePopupImage2(thumbnail2) { var imageurl = thumbnail2.src; var temp = new Array(); temp = imageurl.split('.'); var imagepopup = temp[0].substring(0, temp[0].length - 3) + "." + temp[1]; var img = new Image(); img.src = imagepopup; $get('ctl00_MainContentCPH_UserInterfaceID').style.visibility = 'visible'; $get('ctl00_MainContentCPH_imgPopup').src = img.src; //alert(img.src); if (img.width > 750) { if (screen.width == '1024' || screen.width == '800') { $get('ctl00_MainContentCPH_imgPopup').width = 550; //to show the picture in 1024 or 800 resolutions } else { $get('ctl00_MainContentCPH_imgPopup').width = 750; } } else { $get('ctl00_MainContentCPH_imgPopup').width = img.width; } if (img.height > 568) { if (screen.width == '1024' || screen.width == '800') { $get('ctl00_MainContentCPH_imgPopup').height = 350; //to show the picture in 1024 or 800 resolutions } else { $get('ctl00_MainContentCPH_imgPopup').height = 568; } } else { $get('ctl00_MainContentCPH_imgPopup').height = img.height; } // } } Please find the error and let me know what is the right way to achieve this? Thanks in advance

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  • input type=image width being ignored

    - by kastulo
    im making an image button like this: <input type="image" src="red.jpeg" width="150px"> but it is displaying the original image size which is much larger, if i put: <img src="red.jpeg" width="150px"> it displays the image 150px wide as i want, what do you guys think is the problem with this? I have tried styling it with a class and CSS but not working either, please help me with this, im going nuts!!

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  • About presenter pattern in rails. is a better way to do it?

    - by Totty
    I have in my model: def presenter @presenter ||= ProfilePresenter.new(self) @presenter end The ProfilePresenter is a class that has methods like, get_link(), get_img_url(size), get_sex(), get_relationship_status() and other methods that have not to do with the model, not even with the controller but is used multiple times in the view. So now i use them by doing this: Profile.presenter.get_link # or Profile.presenter.get_img_url('thumb') # returns the path of the image. is not used to make a db query

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  • Is this a correct syntax (c code found on wikipedia)?

    - by m4design
    I just found this code on wikipedia. Link: http://en.wikipedia.org/wiki/Sizeof#Use The code: /* the following code illustrates the use of sizeof * with variables and expressions (no parentheses needed), * and with type names (parentheses needed) */ char c; printf("%zu,%zu", sizeof c, sizeof(int)); It states that: "The z prefix should be used to print it, because the actual size can differ on each architecture." I tried it on my compiler, but it gives the following result: 'zu,zu'

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  • Specializing function template for both std::string and char*

    - by sad_man
    As the title says I want to specialize a function template for both string and char pointer, so far I did this but I can not figure out passing the string parameters by reference. #include <iostream> #include <string> template<typename T> void xxx(T param) { std::cout << "General : "<< sizeof(T) << std::endl; } template<> void xxx<char*>(char* param) { std::cout << "Char ptr: "<< strlen(param) << std::endl; } template<> void xxx<const char* >(const char* param) { std::cout << "Const Char ptr : "<< strlen(param)<< std::endl; } template<> void xxx<const std::string & >(const std::string & param) { std::cout << "Const String : "<< param.size()<< std::endl; } template<> void xxx<std::string >(std::string param) { std::cout << "String : "<< param.size()<< std::endl; } int main() { xxx("word"); std::string aword("word"); xxx(aword); std::string const cword("const word"); xxx(cword); } Also template<> void xxx<const std::string & >(const std::string & param) thing just does not working. If I rearranged the opriginal template to accept parameters as T& then the char * is required to be char * & which is not good for static text in code. Please help !

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  • I got the address of a large managed object in WinDbg, what next?

    - by Mahen
    I created a high memory utilization dump and using !dumpheap -stat and !dumpheap -mt I got the address of two large string generic list of 30 MB each. I want to know more about these lists. What they contain or which piece of code is using them. Is there a way to find them out? 0:000 !do 2b370038 Name: System.Object[] MethodTable: 71e240bc EEClass: 71c0da54 Size: 33554448(0x2000010) bytes Array: Rank 1, Number of elements 8388608, Type CLASS Element Type: System.Collections.Generic.List`1[[System.String, mscorlib]] Fields: None

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  • How to Embed thumbnails in images

    - by user198222
    I have a bunch of 200X120 thumbnails and a bunch of high quality images, Apparently when I just resize the thumbnails with img size the quality suffers, so we are loading two images from the server the image thumbnail and the actual, I am just trying to optimize my site for speed a little saw someone mention embedding thumbs in the image, does anyone know a program that does that? Is this the best way to achieve my goal of high quality thumbnails?

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  • how to get thumbnails of uploaded images?

    - by Bhushan Firake
    I am developing an image gallery plugin where in user can see the thumbnails of the uploaded pics and on hovering the NEXT and PREVIOUS arrows he can see the thumbnail of the respective images. Is it feasible to get the thumbnails of the pics automatically through code after been uploaded by admin? Suggest me the available libraries to get thumbnails of the pics where the size and shape of the pic being uploaded can be modified. The plugin should either be in C# or JQuery.

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  • How do i escape reserve names in a column? MySQL/Create Table

    - by acidzombie24
    I am generating tables from classes in .NET and one problem is a class may have a field name key which is a reserved mysql keyword. How do i escape it in a create table statement? (Note: The other problem below is text must be a fixed size to be indexed/unique) create table if not exists misc_info ( id INTEGER PRIMARY KEY AUTO_INCREMENT NOT NULL, key TEXT UNIQUE NOT NULL, value TEXT NOT NULL)ENGINE=INNODB;

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