image - Page 114 - Developer IT

Optimising local image loading/rendering on iPhone

- by Tricky

Hi, I'm looking to create an interface where the user can navigate through large volumes of images. Each image has a thumbnail of 128x128 that I wish to display and will be kind of similar to coverflow in operation. I have this all working in principle but am becoming stuck when navigating through content at speed. The interface begins to stutter and becoming jerky. I believe this is primarily because of disk i/o and the cost of rendering each image. Is there anyway this can be handed over to a seperate thread simply? Defaulting to a greyed out thumbnail until the image has loaded? How have Apple managed to achieve this in coverflow? Many thanks,

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Upload image with Photoshop scripting

- by cosmorocket

Is that possible to upload an image from Photoshop (for example, an open image exported to jpeg) to some web place - REST service, FTP etc by using scripting features of Photoshop? For example - I have an image open in Photoshop and then execute some special script that sends an exported version of it to some place over the web. I saw something like this but it uses an automatically generated batch file that executes ftp command on Windows. I would like to use something more beautiful if it's possible. Or may be there are some info to know how to make a simple plugin for just this task. Thanks.

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Saving an image in OpenCV

- by Sujay Ghosh

I am new to OpenCV, and trying to capture an image, and then save it to a file. I am posting the code for your reference, below. The jpg file is being saved, but it is black. // Capture the Image from the webcam CvCapture *pCapturedImage = cvCreateCameraCapture(0); // Get the frame IplImage *pSaveImg = cvQueryFrame(pCapturedImage); // Save the frame into a file cvSaveImage("test.jpg". ,pSaveImg); // A JPG FILE IS BEING SAVED // OF 6KB , BUT IT IS BLACK All of the functions are succesful. I have tried the above code in both XP and Vista - the result is a black image on both. Please let me know what I am missing out.

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Using vertical-align on an element with background-image

- by bobo

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jquery li with image fade in background (fade in class)

- by steve

I'm currently using this code: var gallery = $('ul#gallery').children(); $(gallery).filter(':even').not(':last').hover(function () {$(this).toggleClass('next')}); I'm trying to make it fade this new class in. Currently, there's an <li> with an image in it, no background. When the 'next' class is added, it gives it a background image when hovered over. Is there a way to just fade in the new class without making the image blink/fade at all? Thanks.

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Image Gallery with JQuery Lightbox

- by Michael

Hi there, I've used the JQuery lightbox on a couple of websites, by having a gallery of thumbnails and the thumbnails as links to the bigger photos, such as: <a href="Images/Gallery/1.jpg" class="lightbox"> <img src="Images/Gallery/Thumbnails/1T.jpg" width="136" height="97" /> </a> My question is, using lightbox - can I make it so that I have a thumbnail image that when clicked takes you to a folder with a few pictures to cycle through, rather than just linking to one photo like in the example above? I've tried with one link like above and in the Gallery folder having more than one image, but I don't get any navigation buttons, just the one image that is linked to.

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Inscribe and center an image within a frame

- by Brennan Roberts

Given a div of arbitrary aspect ratio, what's the best way to place and style an image (also with an arbitrary aspect ratio) inside such that: It is both inscribed and centered Its dimensions and position are set using relative values so that the image will remain inscribed and centered automatically when the frame is uniformly scaled (javascript should only be required when the image is initially inserted, or if the frame's aspect ratio changes) Extra markup is minimized Here's the result we want: Here's a fiddle template, which is just: Markup Should pillarbox <div class="frame"> <img src="http://www.placekitten.com/200/300" /> </div> Should letterbox <div class="frame"> <img src="http://www.placekitten.com/300/200" /> </div> CSS .frame { width: 200px; height: 200px; border: 2px solid black; margin: 10px 0px 100px 0; }

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Adding a button inside an image.

- by iSharreth

CGRect frame = CGRectMake(round((self.view.bounds.size.width - kImageWidth) / 2.0), kTopPlacement, kImageWidth, kImageHeight); self.containerView = [[[UIView alloc] initWithFrame:frame] autorelease]; [self.view addSubview:self.containerView]; // create the initial image view frame = CGRectMake(0.0, 0.0, kImageWidth, kImageHeight); self.mainView = [[[UIImageView alloc] initWithFrame:frame] autorelease]; self.mainView.image = [UIImage imageNamed:imagePath]; I want to put a button inside mainview.image. How can I do it? Any help will be greatly appreciated.

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image overlap in html.

- by Deepali

I want to overlap a two images one each other in perticular condition. code: <td width="100%" height="70" background="<?PHP echo($adThumbSrc); ?>"> <a title="Click Here to View this Item" href="../<?php echo($arr['adNumber']);?>/index.htm" target="_new"> <img id="img_<?PHP echo($arr['id']); ?>" border="0" src="../images/<?PHP echo($arr['isSold']=='N' ? 'clearthumb.gif' : 'soldclear.gif'); ?>" width="99" height="70px"></a></td> But its results background image not showing properly, it is possible to gave to image tag,but when I give two image tags then it wont overlap,it shows two different images.

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Make input field background image disappear after text is inputted

- by aslum

I'd like to make the background image for my input field disappear once the user has typed any amount of text in it. Is there a simple way to do that in javascript? I can get it so the bg disappears while the field is focused, but then it returns once they move on to the next field. HTML: Call me at <input name="phone" type="text" class="phone-field" id="phone"> CSS: .form input { background-color:transparent; } .form input:focus { background-color:#edc; background-image:none; } input.phone-field { background-image: (url/images/phonebg.png); background-repeat: no-repeat; background-position: left 1px; }

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Deleting an Image that has been used by a WPF control

- by Peter

Hi, I would like to bind an Image to some kind of control an delete it later on. path = @"c:\somePath\somePic.jpg" FileInfo fi = new FileInfo(path); Uri uri = new Uri(fi.FullName, UriKind.Absolute); var img = new System.Windows.Controls.Image(); img.Source = new BitmapImage(uri); Now after this code I would like to delete the file : fi.Delete(); But I cannot do that since the image is being used now. Between code fragment 1 en 2 what can I do to release it? Thanks

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System.Drawing.Image for Images in Business Objects?

- by Mudu

Hi Folks I'd like to store an image in a business object. In MSDN I saw that the System.Drawing-namespace provides lots of GDI+-features, etc. Is it okay to store an Image in an System.Drawing.Image class in business layer (which is a class library "only"), and thus including a reference to System.Drawing too? I slightly feel just kind of bad doing that, 'cause it seems like I have UI-specific references in business code. Moreover, the code could become unnecessarily platform-dependant (though this is only a problem in theory, because we do not develop for multiple platforms). If it isn't right that way, which type would fit best? Thank you for any response! Matthias

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Email an image via custom url scheme

- by Amaresh

I am using custom url schemes. I can send string messages as parameters to my custom url and emailing this to any person. When any person opens this email attachment in device in it open my app installed in device with the passed parameters in my custom url. Similarly how to email an image via custom url and when any person opens this attachment the image is passed to my app in device. I tried to encode the image in base64 format and tried to append to my url,but not working. Any ideas?? Thanks in advance

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PHP Image Link in FUnction 404's

- by Dave C

Hello, I have a valid link that goes to a picture located on my web server. It is a simple jpg image, I can copy and paste this link into my web browser and it loads fine. The issue comes in when I try to call a few php functions on the image... such as getimagesize or fopen... they both return 404 errors even though the image is there. Does anyone know that could be causing this? Thank you for your time.

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Generate colour palette from uploaded image

- by greenie

Just for fun I've been looking at how to use the GD library to create a colour palette from an image. So far I've used GD to resize a user uploaded image to an appropriate size for displaying on a webpage. Now I'd like to be able to get about five or so different colours from the image that represent the range of colours present in it. Once I've done that I'd like to generate a complementary palette based upon those colours, which I can then use to colour different elements on the page. Any help I can get about how I would find the initial colour palette would be much appreciated!

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Problem resizing image using Code Ignitor1.7.3

- by Yashwant Chavan

Following is the code which resize the image, but here i am not able to resize the image function processHome(){ $this->load->library('image_lib'); $img_path = base_url().'img/image/50X50/ori.jpeg'; $config['image_library'] = 'gd2'; $config['source_image'] = $img_path; $config['create_thumb'] = TRUE; $config['maintain_ratio'] = TRUE; $config['width'] = 50; $config['height'] = 50; $this->load->library('image_lib', $config); $this->image_lib->resize(); if ( ! $this->image_lib->resize()){ echo $this->image_lib->display_errors(); } echo "No error"; exit; $this->load->view('index', $data); }

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Projection matrix + world plane ~> Homography from image plane to world plane

- by B3ret

I think I have my wires crossed on this, it should be quite easy. I have a projection matrix from world coordinates to image coordinates (4D homogeneous to 3D homgeneous), and therefore I also have the inverse projection matrix from image coordinates to world "rays". I want to project points of the image back onto a plane within the world (which is given of course as 4D homogeneous vector). The needed homography should be uniquely identified, yet I can not figure out how to compute it. Of course I could also intersect the back-projected rays with the world plane, but this seems not a good way, knowing that there MUST be a homography doing this for me. Thanks in advance, Ben

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How to set a local image in pynotify?

- by George Edison

If I run the following in python in Ubuntu 10.04: >>> import pynotify >>> p = pynotify.Notification ("Notice","","/home/george/Pictures/test.png") >>> p.show() true The message displays as expected, except the image does not appear in the OSD. How can I display a local image? In fact, for what I need, it would be better if I could display a remote image. (via HTTP) How can I do that?

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Masking to Transparent returns empty image

- by Tibi

Hi there, I'm trying to put white color in my images to transparent with the following code. Problem is that "CGImageRef maskedTransparent" is blank. I don't understand because the code I'm using is nearly a copy paste from the doc ... Any idea ? (UIImage*) maskImage:(UIImage *)image withMask:(UIImage *)maskImage { CGImageRef maskRef = maskImage.CGImage; CGImageRef mask = CGImageMaskCreate(CGImageGetWidth(maskRef), CGImageGetHeight(maskRef), CGImageGetBitsPerComponent(maskRef), CGImageGetBitsPerPixel(maskRef), CGImageGetBytesPerRow(maskRef), CGImageGetDataProvider(maskRef), NULL, false); CGImageRef masked = CGImageCreateWithMask([image CGImage], mask); //Array defining min & max RGB values to be transformed to transparent colors. float maskingMinMax[6] = {255, 255, 255, 255, 255, 255}; //masking image to remove range in maskinLinMax CGImageRef maskedTransparent = CGImageCreateWithMaskingColors(masked, maskingMinMax); return [UIImage imageWithCGImage:maskedTransparent]; }

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Changing Image In a Button After Being Clicked?

- by BuZzZzJaY

Creating a game in Android using multiple Buttons to display an image from the drawable folder. I want to change the button to a different image after the button has been clicked on. Here is the button code: <Button android:id="@+id/b36" android:background="@drawable/black" android:layout_width="45px" android:layout_height="45px" /> I can't find anything about how to change the actual image of the button. You can change the color of the button by using the following code in the java file: b36.setBackgroundColor(0xAA00AA00);

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Sending an image via POST Multipart (HTTPRequest)

- by James Jeffery

I'm trying to send an image to a server, using HTTP Post Multipart. Everything else is fine, I have all the boundrys set and stuff. But what do I have to do to the image before hand? Do I have to convert it to binary? Here is the header data from the header (using Fiddler). This is what I need to upload: -----------------------------7daea2aa40c80 Content-Disposition: form-data; name="pict"; filename="pic.jpeg" Content-Type: image/pjpeg <Binary here ... or at least I think it is> .. ?????JFIF?????????C? (lots more of this I removed) Any advice?

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CSS background image ?

- by BillyD

I have a div that is 200px by 200px. If I want to place a 30x30px no-repeat background image at the top left corner position of 120px from the left and 50px from the top ... while also allowing the text inside that div to be displayed on top of the background image ... how would I do that? I tried the following, but it doesnt appear to work. background:url(http://example.com/background-image.png) no-repeat 120px 50px; Any ideas how to perform what I want to accomplish?

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how can read data in image uri

- by satyamurthy

hi sir i am implementing image upload then i got image uri how can read data in image uri File Img = new File(selectedImage.getPath()+inFileType); System.out.println("2............."+Img); FileInputStream is = null; try { is = new FileInputStream(Img); is.read(buffer); BufferedInputStream bis = new BufferedInputStream(is); Bitmap bm = BitmapFactory.decodeStream(is); bis.close(); is.close(); this code implementing i got uri how can read data

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Save BLOB to disk as Image C#

- by TGuimond

Hello, I am developing a web application that calls web services developed by a third party to send/receive data from a clients database. I am building the application using ASP.NET 3.5 C#. The way that they are providing me images is in BLOB format. I call their method and what I get back is a DataSet with 2 fields "logo_name" and "logo" which is the BLOB field. What I want to do is: Save the image locally on the disk (to minimize calls to their database in the future). I have been playing around with a couple of different ways of doing this but cannot seem to get the image to save correctly. I have been able to create a file in a folder with the correct name but if I try to view the image it does not work. I was hoping someone could give me some sample code to show me how to save a BLOB field to the local disk? Thanks

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How to save bytes to an image and access it from Bottle

- by Graham Smith

I'm working on an API wrapper for Snapchat using Python and Bottle, but in order to return the file (retrieved by the Python script) I have to save the bytes (returned by Snapchat) to a .jpg file. I'm not quite sure how I will do this and still be able to access the file so that it can be returned. Here's what I have so far, but it returns a 404. @route('/image') def image(): username = request.query.username token = request.query.auth_token img_id = request.query.id return get_blob(username, token, img_id) def get_blob(usr, token, img_id): # Form URL and download encrypted "blob" blob_url = "https://feelinsonice.appspot.com/ph/blob?id={}".format(img_id) blob_url += "&username=" + usr + "&timestamp=" + str(timestamp()) + "&req_token=" + req_token(token) enc_blob = requests.get(blob_url).content # Save decrypted image FileUpload.save('/images/' + img_id + '.jpg') img = open('images/' + img_id + '.jpg', 'wb') img.write(decrypt(enc_blob)) img.close() return static_file(img_id + '.jpg', root='/images/')

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- by Tricky

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- by bobo

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