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  • Is using the .NET Image Conversion enough?

    - by contactmatt
    I've seen a lot of people try to code their own image conversion techniques. It often seems to be very complicated, and ends up using GDI+ function calls, and manipulating bits of the image. This has got me wondering if I am missing something in the simplicity of .NET's image conversion call when saving an image. Here's the code I have: Bitmap tempBmp = new Bitmap("c:\temp\img.jpg"); Bitmap bmp = new Bitmap(tempBmp, 800, 600); bmp.Save(c:\temp\img.bmp, //extension depends on format ImageFormat.Bmp) //These are all the ImageFormats I allow conversion to within the program. Ignore the syntax for a second ;) ImageFormat.Gif) //or ImageFormat.Jpeg) //or ImageFormat.Png) //or ImageFormat.Tiff) //or ImageFormat.Wmf) //or ImageFormat.Bmp)//or ); This is all I'm doing in my image conversion. Just setting the location of where the image should be saved, and passing it an ImageFormat type. I've tested it the best I can, but I'm wondering if I am missing anything in this simple format conversion, or if this is sufficient?

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  • iPhone SDK - How is data shared in a universal app

    - by norskben
    Stack overflow I want to make a universal version of my app available, but I am wondering how is data managed between the iPad and the iPhone versions? -Are they completely independent? or if I have a plist in the iPad app, does it also appear in the iPhone app. If so, is there any syncing etc etc. I have a few months experience with single iPad or iPhone apps, but never a universal. Thanks again. UPDATE: I was interested in the files in the /Documents folder, does this automatically update on itunes syncing at all?

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  • PHP image watermark only displaying image on page

    - by Satch3000
    I am testing a script where I watermark an image in my webpage. The script works fine and the image is watermark but my problem is that only the image is displayed on the page. As soon as I add the script to my page it's like the web page is converted to the image that I'm watermarking. I think it's because of header("content-type: image/jpeg"); from the code. I need to watermark the image on my webpage but I also need the rest of my webpage to be displayed too. How is this done? I'm quite confused on how this works. The script I'm using is from here Here's the code I'm using: <?php $main_img = "Porsche_911_996_Carrera_4S.jpg"; // main big photo / picture $watermark_img = "watermark.gif"; // use GIF or PNG, JPEG has no tranparency support $padding = 3; // distance to border in pixels for watermark image $opacity = 100; // image opacity for transparent watermark $watermark = imagecreatefromgif($watermark_img); // create watermark $image = imagecreatefromjpeg($main_img); // create main graphic if(!$image || !$watermark) die("Error: main image or watermark could not be loaded!"); $watermark_size = getimagesize($watermark_img); $watermark_width = $watermark_size[0]; $watermark_height = $watermark_size[1]; $image_size = getimagesize($main_img); $dest_x = $image_size[0] - $watermark_width - $padding; $dest_y = $image_size[1] - $watermark_height - $padding; // copy watermark on main image imagecopymerge($image, $watermark, $dest_x, $dest_y, 0, 0, $watermark_width, $watermark_height, $opacity); // print image to screen header("content-type: image/jpeg"); imagejpeg($image); imagedestroy($image); imagedestroy($watermark); ?> NOTE: I'm getting the image path from the database so I cannot hardcode the image filename as it's dynamic.

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  • Upgrade live Universal App to iPad only

    - by Alpár
    Hi. We have a live universal app in the AppStore. Our client changed his mind and doesn't want the app to be universal anymore, he wants it to be iPad only. Since the app was submitted some time ago, there are users who use the iPhone version. What happens if we submit an upgrade that is iPad only? Will the review team reject it? And if it goes live, will the iPhone users receive a notification about the update? If yes in what form? Or will the iPhone users just be unable to reinstall the app? Thank you!

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  • iPhone - How to use #define in Universal app

    - by Satyam svv
    I'm creating universal app that runs oniphone and ipad. I'm using #define to create CGRect. And I want to use two different #define - one for iPhone and one for iPad. How can I declare them so that correct one will be picked by universal app.......... I think I've to update little more description to avoid confusion. I've a WPConstants.h file where I'm declaring all the #define as below #define PUZZLE_TOPVIEW_RECT CGRectMake(0, 0, 480, 100) #define PUZZLE_MIDDLEVIEW_RECT CGRectMake(0, 100, 480, 100) #define PUZZLE_BOTTOMVIEW_RECT CGRectMake(0, 200, 480, 100) The above ones are for iphone. Similarly for iPad I want to have different #define How can I proceed further?

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  • Blurred image recovery?

    - by m0s
    I have pictures of handwritten text and some of them are blurred, because the camera was shaky. If someone could point out any techniques that I can use to bring it to readable quality would be great. It is really a closeup, and I'm pretty sure it is doable. If you can recommend a specialized software or you know some techniques in photo-shop or any other software that would help please comment.

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  • Rotating images with PHP reduces quality especially over about 10-20 actions

    - by Dylan Cross
    I am using this code below to rotate my jpeg images, the problem is that after around 10-20 times of rotating the image the image is dramatically lower quality, especially blue skies and such, my question is how can I keep these images the same high quality image? There must be a way. I mean, i keep the original image on the server for each image uploaded, and I don't do anything to that, so if need be it, I guess I could always come up with some way of using that over whenever possible.. But would rather not have to. $source = imagecreatefromjpeg($filename); $rotate = imagerotate($source, 90, 0); imagejpeg($rotate, $filename ,100);

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  • Issue with WIC image resizing on ASP.NET MVC 2

    - by Dave
    I am attempting to implement image resizing on user uploads in ASP.NET MVC 2 using a version of the method found: here on asp.net. This works great on my dev machine, but as soon as I put it on my production machine, I start getting the error 'Exception from HRESULT: 0x88982F60' which is supposed to mean that there is an issue decoding the image. However, when I use WICExplorer to open the image, it looks ok. I've also tried this with dozens of images of various sources and still get the error (though possible, I doubt all of them are corrupted). Here is the relevant code (with my debugging statements in there): MVC Controller [Authorize, HttpPost] public ActionResult Upload(string file) { //Check file extension string fx = file.Substring(file.LastIndexOf('.')).ToLowerInvariant(); string key; if (ConfigurationManager.AppSettings["ImageExtensions"].Contains(fx)) { key = Guid.NewGuid().ToString() + fx; } else { return Json("extension not found"); } //Check file size if (Request.ContentLength <= Convert.ToInt32(ConfigurationManager.AppSettings["MinImageSize"]) || Request.ContentLength >= Convert.ToInt32(ConfigurationManager.AppSettings["MaxImageSize"])) { return Json("content length out of bounds: " + Request.ContentLength); } ImageResizerResult irr, irr2; //Check if this image is coming from FF, Chrome or Safari (XHR) HttpPostedFileBase hpf = null; if (Request.Files.Count <= 0) { //Scale and encode image and thumbnail irr = ImageResizer.CreateMaxSizeImage(Request.InputStream); irr2 = ImageResizer.CreateThumbnail(Request.InputStream); } //Or IE else { hpf = Request.Files[0] as HttpPostedFileBase; if (hpf.ContentLength == 0) return Json("hpf.length = 0"); //Scale and encode image and thumbnail irr = ImageResizer.CreateMaxSizeImage(hpf.InputStream); irr2 = ImageResizer.CreateThumbnail(hpf.InputStream); } //Check if image and thumbnail encoded and scaled correctly if (irr == null || irr.output == null || irr2 == null || irr2.output == null) { if (irr != null && irr.output != null) irr.output.Dispose(); if (irr2 != null && irr2.output != null) irr2.output.Dispose(); if(irr == null) return Json("irr null"); if (irr2 == null) return Json("irr2 null"); if (irr.output == null) return Json("irr.output null. irr.error = " + irr.error); if (irr2.output == null) return Json("irr2.output null. irr2.error = " + irr2.error); } if (irr.output.Length > Convert.ToInt32(ConfigurationManager.AppSettings["MaxImageSize"]) || irr2.output.Length > Convert.ToInt32(ConfigurationManager.AppSettings["MaxImageSize"])) { if(irr.output.Length > Convert.ToInt32(ConfigurationManager.AppSettings["MaxImageSize"])) return Json("irr.output.Length > maximage size. irr.output.Length = " + irr.output.Length + ", irr.error = " + irr.error); return Json("irr2.output.Length > maximage size. irr2.output.Length = " + irr2.output.Length + ", irr2.error = " + irr2.error); } //Store scaled and encoded image and thumbnail .... return Json("success"); } The code is always failing when checking if the output stream is null (i.e. irr.output == null is true). ImageResizerResult and ImageResizer public class ImageResizerResult : IDisposable { public MemoryIStream output; public int width; public int height; public string error; public void Dispose() { output.Dispose(); } } public static class ImageResizer { private static Object thislock = new Object(); public static ImageResizerResult CreateMaxSizeImage(Stream input) { uint maxSize = Convert.ToUInt32(ConfigurationManager.AppSettings["MaxImageDimension"]); try { lock (thislock) { // Read the source image var photo = ByteArrayFromStream(input); var factory = (IWICComponentFactory)new WICImagingFactory(); var inputStream = factory.CreateStream(); inputStream.InitializeFromMemory(photo, (uint)photo.Length); var decoder = factory.CreateDecoderFromStream(inputStream, null, WICDecodeOptions.WICDecodeMetadataCacheOnDemand); var frame = decoder.GetFrame(0); // Compute target size uint width, height, outWidth, outHeight; frame.GetSize(out width, out height); if (width > height) { //Check if width is greater than maxSize if (width > maxSize) { outWidth = maxSize; outHeight = height * maxSize / width; } //Width is less than maxSize, so use existing dimensions else { outWidth = width; outHeight = height; } } else { //Check if height is greater than maxSize if (height > maxSize) { outWidth = width * maxSize / height; outHeight = maxSize; } //Height is less than maxSize, so use existing dimensions else { outWidth = width; outHeight = height; } } // Prepare output stream to cache file var outputStream = new MemoryIStream(); // Prepare JPG encoder var encoder = factory.CreateEncoder(Consts.GUID_ContainerFormatJpeg, null); encoder.Initialize(outputStream, WICBitmapEncoderCacheOption.WICBitmapEncoderNoCache); // Prepare output frame IWICBitmapFrameEncode outputFrame; var arg = new IPropertyBag2[1]; encoder.CreateNewFrame(out outputFrame, arg); var propBag = arg[0]; var propertyBagOption = new PROPBAG2[1]; propertyBagOption[0].pstrName = "ImageQuality"; propBag.Write(1, propertyBagOption, new object[] { 0.85F }); outputFrame.Initialize(propBag); outputFrame.SetResolution(96, 96); outputFrame.SetSize(outWidth, outHeight); // Prepare scaler var scaler = factory.CreateBitmapScaler(); scaler.Initialize(frame, outWidth, outHeight, WICBitmapInterpolationMode.WICBitmapInterpolationModeFant); // Write the scaled source to the output frame outputFrame.WriteSource(scaler, new WICRect { X = 0, Y = 0, Width = (int)outWidth, Height = (int)outHeight }); outputFrame.Commit(); encoder.Commit(); return new ImageResizerResult { output = outputStream, height = (int)outHeight, width = (int)outWidth }; } } catch (Exception e) { return new ImageResizerResult { error = "Create maxsizeimage = " + e.Message }; } } } Thoughts on where this is going wrong? Thanks in advance for the effort.

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  • SSRS: Report loading external images, image not found, can I hide the image control

    - by Nauman
    My SSRS report loads logo images for each customer from a customer number specific folder on the report server. I write an expression, to form my URL to the image based on th customer number. ..."http://localhost/images/" + iCustomerNumber.ToString() + "/logo.gif" I am able to get this working, but the problem I face is, when a particular customer doesn't has an image, then my report shows a red X mark in place of the logo. In this case, I expect to hide the image control itself. Any thoughts???? The other dirty solution will be to ensure that each customer specific folder has the designated image! even if there is no logo for a customer, I'll place a blank.gif or a spacer.gif of probably a square pixel in dimension!.

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  • ASP.NET store Image in SQL and retrieve for Asp:Image

    - by sweetcoder
    I am looking to fileupload a picture jpeg,gif,etc into an SQL database on an updateprofilepicture page. Then on the profile page, I want to retrieve the image from an sql database and have it show up in an Asp:Image control. I have much code trying to do this and it doesn't work. The table contains a column of type Image.

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  • Image Processing, joining the small images to form the main image

    - by n0idea
    Good morning everyone, Actually I'm having a small issue in image processing and I'm in need of some help. First of all, let me explain what i want to do, i have an image that was split into 4 other small images. I currently have like 6 small images that i need to figure out which ones are part of the real image. Second, what i currently know is that that i should compare these images edges or last column with the first column of the other image. I'm not sure yet what exactly should be done, anyone is able to put me on the same tracks, with some detailed hints and how to compare the edges of 2 images. Some links and example codes will be help full. One more thing, how am i able to read .Raw images using java, c# or python ?

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  • Image Data via Ajax - how can I display the image on the Page

    - by Mike B
    I am creating a Domino Document via AJAX that contains a photo. I am able to get the base64 image data back to the server in a Notes Domino Document. Data is stored in a Richtext (textarea) field as "data:image/jpeg;base64,/9j/4AAQSkZJRgABAQAAAQABAAD/2wBDAFA..........." - (this goes on for several lines) I am trying to display on the Domino Webpage using passthru tag <<image id= "pic1" >> in the onLoad event of the Form i try to shove the data into the image element using this code: //Photo Stuff alert(document.forms[0].photo1.value); document.getElementById("pic1").src = document.forms[0].photo1.value; The alert is showing the data. Picture is not appearing. Please help. Thanks Mike

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  • turning text into image - PHP/GD - save image

    - by Phil Jackson
    Hi, I'm using this script to simply create an image from text. What I would like to know is how to save the image instead of printing straight to browser; // an email address in a string $string = $post[$key]; // some variables to set $font = 4; $width = ImageFontWidth($font) * strlen($string); $height = ImageFontHeight($font); // lets begin by creating an image $im = @imagecreatetruecolor ($width,$height); //white background $background_color = imagecolorallocate ($im, 255, 255, 255); //black text $text_color = imagecolorallocate ($im, 0, 0, 0); // put it all together $image = imagestring ($im, $font, 0, 0, $string, $text_color); I know its probably just one line of code at the end but im not sure which GD function to use. Any help would be much appreciated, Regards, Phil.

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  • Dynamically reducing image dimension as well as image size in C#

    - by hanesjw
    I have an image gallery that is created using a repeater control. The repeater gets bound inside my code behind file to a table that contains various image paths. The images in my repeater are populated like this <img src='<%# Eval("PicturePath")' %>' height='200px' width='150px'/> (or something along those lines, I don't recall the exact syntax) The problem is sometimes the images themselves are massive so the load times are a little ridiculous. And populating a 150x200px image definitely should not require a 3MB file. Is there a way I can not only change the image dimensions, but shrink the file size down as well? Thanks!

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  • Convert HTML template (HTML Code) into an image using php library [on hold]

    - by user2727841
    I'm taking input from user through tiny mce editor which is actually html template (HTML Code) and i want to convert that html template (code) into an image using php libaray, How to do it? Is there any API (SDK) OR library for it? well I prefered API (SDK) OR library which actually convert html template (code) into an image... I've searched every where but didn't succeed, now can any one tell me any php library which convert html code into an image... Thanks in advance

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  • How To Get Web Site Thumbnail Image In ASP.NET

    - by SAMIR BHOGAYTA
    Overview One very common requirement of many web applications is to display a thumbnail image of a web site. A typical example is to provide a link to a dynamic website displaying its current thumbnail image, or displaying images of websites with their links as a result of search (I love to see it on Google). Microsoft .NET Framework 2.0 makes it quite easier to do it in a ASP.NET application. Background In order to generate image of a web page, first we need to load the web page to get their html code, and then this html needs to be rendered in a web browser. After that, a screen shot can be taken easily. I think there is no easier way to do this. Before .NET framework 2.0 it was quite difficult to use a web browser in C# or VB.NET because we either have to use COM+ interoperability or third party controls which becomes headache later. WebBrowser control in .NET framework 2.0 In .NET framework 2.0 we have a new Windows Forms WebBrowser control which is a wrapper around old shwdoc.dll. All you really need to do is to drop a WebBrowser control from your Toolbox on your form in .NET framework 2.0. If you have not used WebBrowser control yet, it's quite easy to use and very consistent with other Windows Forms controls. Some important methods of WebBrowser control are. public bool GoBack(); public bool GoForward(); public void GoHome(); public void GoSearch(); public void Navigate(Uri url); public void DrawToBitmap(Bitmap bitmap, Rectangle targetBounds); These methods are self explanatory with their names like Navigate function which redirects browser to provided URL. It also has a number of useful overloads. The DrawToBitmap (inherited from Control) draws the current image of WebBrowser to the provided bitmap. Using WebBrowser control in ASP.NET 2.0 The Solution Let's start to implement the solution which we discussed above. First we will define a static method to get the web site thumbnail image. public static Bitmap GetWebSiteThumbnail(string Url, int BrowserWidth, int BrowserHeight, int ThumbnailWidth, int ThumbnailHeight) { WebsiteThumbnailImage thumbnailGenerator = new WebsiteThumbnailImage(Url, BrowserWidth, BrowserHeight, ThumbnailWidth, ThumbnailHeight); return thumbnailGenerator.GenerateWebSiteThumbnailImage(); } The WebsiteThumbnailImage class will have a public method named GenerateWebSiteThumbnailImage which will generate the website thumbnail image in a separate STA thread and wait for the thread to exit. In this case, I decided to Join method of Thread class to block the initial calling thread until the bitmap is actually available, and then return the generated web site thumbnail. public Bitmap GenerateWebSiteThumbnailImage() { Thread m_thread = new Thread(new ThreadStart(_GenerateWebSiteThumbnailImage)); m_thread.SetApartmentState(ApartmentState.STA); m_thread.Start(); m_thread.Join(); return m_Bitmap; } The _GenerateWebSiteThumbnailImage will create a WebBrowser control object and navigate to the provided Url. We also register for the DocumentCompleted event of the web browser control to take screen shot of the web page. To pass the flow to the other controls we need to perform a method call to Application.DoEvents(); and wait for the completion of the navigation until the browser state changes to Complete in a loop. private void _GenerateWebSiteThumbnailImage() { WebBrowser m_WebBrowser = new WebBrowser(); m_WebBrowser.ScrollBarsEnabled = false; m_WebBrowser.Navigate(m_Url); m_WebBrowser.DocumentCompleted += new WebBrowserDocument CompletedEventHandler(WebBrowser_DocumentCompleted); while (m_WebBrowser.ReadyState != WebBrowserReadyState.Complete) Application.DoEvents(); m_WebBrowser.Dispose(); } The DocumentCompleted event will be fired when the navigation is completed and the browser is ready for screen shot. We will get screen shot using DrawToBitmap method as described previously which will return the bitmap of the web browser. Then the thumbnail image is generated using GetThumbnailImage method of Bitmap class passing it the required thumbnail image width and height. private void WebBrowser_DocumentCompleted(object sender, WebBrowserDocumentCompletedEventArgs e) { WebBrowser m_WebBrowser = (WebBrowser)sender; m_WebBrowser.ClientSize = new Size(this.m_BrowserWidth, this.m_BrowserHeight); m_WebBrowser.ScrollBarsEnabled = false; m_Bitmap = new Bitmap(m_WebBrowser.Bounds.Width, m_WebBrowser.Bounds.Height); m_WebBrowser.BringToFront(); m_WebBrowser.DrawToBitmap(m_Bitmap, m_WebBrowser.Bounds); m_Bitmap = (Bitmap)m_Bitmap.GetThumbnailImage(m_ThumbnailWidth, m_ThumbnailHeight, null, IntPtr.Zero); } One more example here : http://www.codeproject.com/KB/aspnet/Website_URL_Screenshot.aspx

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  • php image upload library

    - by Tchalvak
    I'm looking to NOT reinvent the wheel with an image upload system in php. Is there a good standalone library that allows for: Creating the system for uploading, renaming, and perhaps resizing images. Creating the front-end, html and/or javascript for the form upload parts of image upload. I've found a lot of image gallery systems, but no promising standalone system & ui libraries, ready for insertion into custom php.

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  • Inserting an Image into a PDF

    - by Cerin
    Are there Linux/Ubuntu programs capable of inserting a partially transparent image into a PDF? I'm trying to "sign" a PDF document by inserting an image of my signature, but even though every OSX and Windows PDF editor seems to support this, I haven't found any Linux PDF editors that do. I've tried PDFChain, PDF Editor, Flpsed PDF Annotator, Openoffice, Scribus, Krita, and PDFSam, and none support this. Although not technically a Linux program, I tried the site pdfescape.com, but it corrupts the images it inserts, rendering it useless for this task. Note, I'm talking about keeping the PDF in PDF format, so rasterizing it to a TIF/PNG/BMP, editing it in Gimp, and then dumping it back into a PDF isn't a solution. EDIT: I might have been premature in my criticism of pdfescape.com and PDF Editor. I was viewing the resulting PDF in Evince, which was showing a mangled image, but when I opened the PDF in PDF Editor, the image rendered correctly. I've since sent the PDF to someone on Windows who confirmed the image showed correctly. It looks like the problem might be inaccurate rendering with Evince.

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  • Image Comparision

    - by harigm
    How do I compare the 2 images in Java based web application. I have installed the Biometric thumb reader, I need to read the user Thumb and compare it with his thumb image which is captured during the registration process. Initially I am storing the image in the Mysql as Blob. Else I can store that image in a separate folder as well Please suggest which is best way to do 1)Shall i Use the Java script 2)Is there any built in Java API to perform this

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  • Biometric implementation in Java application and Image Comparision

    - by harigm
    How do I compare the 2 images in Java based web application. I have installed the Biometric thumb reader, I need to read the user Thumb and compare it with his thumb image which is captured during the registration process. Initially I am storing the image in the Mysql as Blob. Else I can store that image in a separate folder as well Please suggest which is best way to do 1)Shall i Use the Java script 2)Is there any built in Java API to perform this

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  • How to "smart resize" a displayed image to original aspect ratio

    - by Paul Sasik
    I have an application in which end-users can size and position images in a designer. Since the spec calls for the image to be "stretched" to the containing control, the end user can end up with an awkwardly stretched image. To help the user with image sizing I am thinking of implementing a smart resizer function which would allow the the user to easily fix the aspect ratio of the picture so that it no longer appears stretched. The quick way to solve this is to actually provide two options: 1) scale from width 2) scale from height. The user chooses the method and the algorithm adjusts the size of the picture by using the original aspect ratio. For example: A picture is displayed as 200x200 on the designer but the original image is 1024x768 pixels. The user chooses "Smart Size from width" and the new size becomes ~200x150 since the original aspect ratio is ~1.333 That's OK, but how could I make the algorithm smarter and not bother the user by asking which dimension the recalculation should be based on?

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