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  • How to make a single image in to different(optimize) sizes once image uploaded?

    - by Shakil
    Hi All i am working on mvc4(webapi) i need create for single image into different sizes for example i had loaded a image for file upload control once press the button of upload the single image should divide in to different sizes (like thumbnail large size medium size ) actually i am new for webapi i don't have any idea about it but i need to make this by writing hard code i will provide a path for it to store images could any body plz help me to do this work thank in advance

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  • OpenCV haar training for static image

    - by Evl-ntnt
    I trying to train haar cascade classificator for card suite detection (which no rotation and has no distortion on image) For example I have file Clubs.png which contents clubs image on white background 20x20 pixels This tutorial is so tangled http://note.sonots.com/SciSoftware/haartraining.html My image varies only in sizes, no distortion or angling. Which commands I must enter in aim to get Clubs.xml file?

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  • Cannot use "image.save" on django

    - by zjm1126
    My error is: IOError at /mytest/photo/upload/ [Errno 2] No such file or directory: u'/mytest/photo/upload/2.png' And my view is: UPLOAD_URL = '/mytest/photo/upload/' def upload(request): buf = request.FILES.get('photo', None) print buf if buf: #data = buf.read() #f = StringIO.StringIO(data) image = Image.open(buf) #image = image.convert('RGB') name = '%s%s' % (UPLOAD_URL, buf.name) image.save(file(name, 'wb'), 'PNG') return HttpResponse('ok') return HttpResponse('no') And my urls.py is: urlpatterns = patterns('mytest.views', url(r'^photo/upload/$','upload',name="") ) How can I fix this?

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  • Apache returns truncated image

    - by ChronoFish
    I am bringing up an image directly through firefox (no PHP or other scripting code) and it appears that Apache is returning either a truncated image or a corrupted image. I get the top 5-10% of the image. It appears that I get complete width and height info. If I hit "refresh" (in firefox) I get about 5 more lines of the image. And if I hit refresh again I get another 5 lines. In IE I get the same initial 5-10% of the top of the file. But refresh does not give me any more. Bringing the image up across the network through a mapped-drive reveals the entire image. (so the image(s) itself seems to be okay). (If I point firefox to the image via mapped-drive rather than through Apache firefox brings the image up just fine. So it does seem to be Apache at issue) Any ideas?

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  • Rotate and Save Image - C#

    - by Taylor
    Hello, I'm trying to rotate and save an image, along with returning a BitmapSource. I pass in the rotation value (90 or -90) and the full path to the image I want to rotate to the method shown here. It works fine if I start and stop my application between calling this method. however, if the application calls rotate multiple times the rotate only happens once. I know the original image must be cached in memory, because if I pass values 90, 180, 270 I see the rotations work. I want to be able to pass in a value of 90 or -90 and have that rotate and save the original image. How can I make the rotate work for each call? Is there a way to clear the cached value of the image? If I don't set the BitmapCacheOption to OnLoad, I am unable to transform and save the image since the image is "being used by another process". public BitmapImage Rotate(int val, string path) { //create a new image from existing file. Image image = new Image(); BitmapImage logo = new BitmapImage(); logo.BeginInit(); logo.CacheOption = BitmapCacheOption.OnLoad; logo.UriSource = new Uri(path); logo.EndInit(); image.Source = logo; BitmapSource img = (BitmapSource)(image.Source); //rotate image and save CachedBitmap cache = new CachedBitmap(img, BitmapCreateOptions.None, BitmapCacheOption.OnLoad); TransformedBitmap tb = new TransformedBitmap(cache, new RotateTransform(val)); TiffBitmapEncoder encoder = new TiffBitmapEncoder(); encoder.Frames.Add(BitmapFrame.Create(tb)); using (FileStream file = File.OpenWrite(path)) { encoder.Save(file); } //update page view BitmapImage bi = new BitmapImage(); bi.BeginInit(); bi.CacheOption = BitmapCacheOption.OnLoad; bi.UriSource = new Uri(path); bi.EndInit(); return bi; }

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  • faster way to draw an image

    - by iHorse
    im trying to combine two images into a single image. unfortunately this has to be done very quickly in response to a user sliding a UISlider. i can combine the two images into a single image no problem. but the way I'm doing it is horribly slow. the sliders stick and jump rather frustratingly. i don't think i can throw the code into a background thread because i would run out of threads to quickly. i haven't actually tired that yet. below is my code. any ideas on how to speed it up would be helpful. UIGraphicsBeginImageContext(CGSizeMake(bodyImage.theImage.image.size.width * 1.2, bodyImage.theImage.image.size.height * 1.2)); [bodyImage.theImage.image drawInRect: CGRectMake(-2 + ((bodyImage.theImage.image.size.width * 1.2) - bodyImage.theImage.image.size.width)/2, kHeadAdjust, bodyImage.theImage.image.size.width * bodyImage.currentScale, bodyImage.theImage.image.size.height * bodyImage.currentScale)]; if(isCustHead) { [Head.theImage.image drawInRect: CGRectMake((bodyImage.theImage.image.size.width * 1.2 - headWidth)/2 - 11, 0, headWidth * 0.92, headWidth * (Head.theImage.image.size.height/Head.theImage.image.size.width) * 0.92)]; } else { [Head.theImage.image drawInRect: CGRectMake((bodyImage.theImage.image.size.width * 1.2 - (headWidth * defaultHeadAdjust))/2 - 10, 0, (headWidth * defaultHeadAdjust * 0.92), (headWidth * defaultHeadAdjust) * (Head.theImage.image.size.height/Head.theImage.image.size.width) * 0.92)]; } drawSurface.theImage.image = UIGraphicsGetImageFromCurrentImageContext(); UIGraphicsEndImageContext();

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  • Cropping image with ImageScience

    - by fl00r
    ImageScience is cool and light. I am using it in my sinatra app. But I can't understand how can I crop image with not square form and how can I make thumbnail with two dimensions. As I found on ImageScience site: ImageScience.with_image(file) do |img| img.cropped_thumbnail(100) do |thumb| thumb.save "#{file}_cropped.png" end img.thumbnail(100) do |thumb| thumb.save "#{file}_thumb.png" end img.resize(100, 150) do |img2| img2.save "#{file}_resize.png" end end I can crop thumb and resize thumb only with ONE dimension but I want to use two, as in RMagick. For example I want to crop 100x200px box from image, or I want to make thumbnail with width or height not bigger then 300 (width) or 500 (height) pixels.

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  • jQuery image gallery preview image popup

    - by JV10
    I've created an image gallery with the preview image popup on hover. http://jsfiddle.net/WSfka/ Hover over the thumbnail images and the larger image preview displays. I'm not happy with the way preview images can flash between moving around the thumbnail images. How can I simplify the script and improve the preview image popup? $(document).ready(function() { $('.imageGalleryAlbum li a img').mouseenter(function() { $(this).closest('li').find('.preview').delay(500).fadeIn(1); $(this).closest('li').siblings().find('.preview').fadeOut(1); return; }); $('.imageGalleryAlbum li .preview').hover(function() { $(this).closest('li').siblings().find('.preview').fadeOut(1); return; }); $('.imageGalleryAlbum li .preview').mouseleave(function() { $(this).closest('li').find('.preview').fadeOut(1); $(this).closest('li').siblings().find('.preview').fadeOut(1); return; }); $('.imageGalleryAlbum li .preview').click(function() { $(this).closest('li').find('.preview').fadeOut(1); $(this).closest('li').siblings().find('.preview').fadeOut(1); return; }); }); $(document).mouseup(function(e) { var container = $(".preview"); if (container.has(e.target).length === 0) { container.fadeOut(1); } });

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  • Creating new image in a loop using OpenCV

    - by user565415
    I am programing some image conversion code with OpenCV and I don't know how can I create image memory buffer to load image on every iteration. I have number of iteration (maxImNumber) and I have an input image. In every loop program must create image that is resized and modified input image. Here is some basic code (concept). for (int imageIndex = 0; imageIndex < maxImNumber; imageIndex++){ cvCopy(inputImage, images[imageIndex], 0); cvReleaseImage(&inputImage); images[imageIndex+1] = cvCreateImage(cvSize((image[imageIndex]->width)/2, image[imageIndex]->height), IPL_DEPTH_8U, 1); for (i=1; i < image[imageIndex]->height; i++) { index = 0; // for(j=0; j < image[imageIndex]->width ; j=j+2){ // doing some basic matematical operation on image content and store it to new image images[imageIndex+1][i][index] = (image[imageIndex][i][j] + image[imageIndex][i][j+2])/2; index++ } } inputImage = cvCreateImage(cvSize((image[imageIndex+1]->width), image[imageIndex]->height), IPL_DEPTH_8U, 1); cvCopy(images[imageIndex+1], inputImage, 0); } Can somebody, please, explain how can I create this image buffer (images[]) and allocate memory for it. Also how can I access any image in this buffer? Thank you very much in advance!

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  • Create a bitonal image for OCR using Image Magick

    - by Greg
    nice /usr/local/bin/convert -colors 2 -colorspace gray -compress group4 /var/www/html/uploads/pokemon.jpg /var/www/html/uploads/pokemontest.jpg This command worked with a really OLD version of Image Magick. With the newest version this method produces a completely black image. nice /usr/local/bin/convert -colorspace gray -compress group4 /var/www/html/uploads/pokemon.jpg /var/www/html/uploads/pokemontest.jpg nice /usr/local/bin/convert -colors 2 /var/www/html/uploads/pokemontest.jpg /var/www/html/uploads/pokemontestfinal.jpg This results in a bitonal gray and black image, but it's really rough. NOT clean at all.

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  • Image container instead of event object in image load event handler

    - by avok00
    I stumbled upon a very strange thing. In FF 3.6 (not tested others yet) I add onload handler to an image like this: imgRef.addEventListener("load", activateLink, false); When load event fires, in activateLink(evt) the evt paramater is not an event, but the "a" tag that contains the image. Why is this? function activateLink(evt) { // evt turns out to be a refference to <a> tag (HTMLAnchorElement) that contains the image. // Actually two of them. Both dynamically added with addElement. } I remembered another fact that may be relevant. I have multiple images with the same src that all have registered this same event handler activateLink. Could this be the problem?

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  • Image links work but show "broken image" in IE.

    - by Path
    I have a problem. I have made some image files for a menu. They work fine in Firefox, but IE (8, haven't tested with others) and Chrome show a broken image.. Image, on top. Even though the images work. The page is here: http://www.silkeborgmuseum.dk/udvikling/index.php This is a very old page of mine but I need to make it work. I have tried searching google and stackoverflow, but have not so far been able to find anyone else having this problem or what is causing it. Can anyone help? As a parting comment, I will say that I have only been developing websites for a few months, but wow, i already hate IE with a fiery passion.

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  • Save open emails when exiting Outlook 2007?

    - by BigChief
    I use open emails as my todo list in Outlook 2007. For instance, when I look at my Inbox in the morning, I open all emails which I need to respond to, and throughout the day read, respond to and close each one. It's an odd system but it's how I manage my emails. Are there any addons available which will save open emails and reopen them if Outlook is restarted? I'm looking for behavior like Firefox's tabs, which will reopen each one if the process gets killed.

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  • Improving Performance on this Image Creation function

    - by Abs
    Hello all, I am making use of GD2 and the image functions to take in a string and then convert that into an image using different fonts at different sizes. The function I use is below. Currently, its pretty quick but not quick enough. The function gets called about 20 times per user and the images generated are always new ones (different) so caching isn't going to help! I was hoping to get some ideas on how to make this function faster. Maybe supply more RAM to the script running? Anything else that is specific to this PHP function? Anything else that I can do to tweak performance of this function? function generate_image($save_path, $text, $font_path, $font_size){ $font = $font_path; /* * I have simplifed the line below, its actually a function that works out the size of the box * that is need for each image as the image size is different based on font type, font size etc */ $measure = array('width' => 300, 'height'=> 120); if($measure['width'] > 900){ $measure['width'] = 900; } $im = imagecreatetruecolor($measure['width'], $measure['height']); $white = imagecolorallocate($im, 255, 255, 255); $black = imagecolorallocate($im, 0, 0, 0); imagefilledrectangle($im, 0, 0, $measure['width'], $measure['height'], $white); imagettftext($im, $font_size, 0, $measure['left'], $measure['top'], $black, $font, ' '.$text); if(imagepng($im, $save_path)){ $status = true; }else{ $status = false; } imagedestroy($im); return $status; } Thanks all for any help

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  • Upload an image using class.upload.php via AJAX, display image in form using jQuery

    - by Benjamin
    I am using class.upload.php to handle an image upload from a form that submits employee details to a MySQL database. class.upload.php does EXACTLY what I want it to do, resize the image and rename it - what I am now trying to accomplish is to upload via Ajax after the user selects the file and then display it in the form while they continue entering details. How would this best be accomplished with jQuery?

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  • Fastest Algorithm to scale down 32Bit RGB IMAGE.

    - by Sunny
    which algorithm to use to scale down 32Bit RGB IMAGE to custom resolution? Algorithm should average pixels. for example If I have 100x100 image and I want new Image of size 20x50. Avg of first five pixels of first source row will give first pixel of dest, And avg of first two pixels of first source column will give first dest column pixel. Currently what I do is first scale down in X resolution, and after that I scale down in Y resolution. I need one temp buffer in this method. Is there any optimized method that you know?

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  • Image Application in WPF and Perfomance.

    - by Harsha
    Hello All, I am planning to build Image processing application using WPF. Brightness /Contrast and Histogram are main operation of this application. I have downloaded the application " Foundations: Bitmaps and Pixel Bits" from http://msdn.microsoft.com/en-us/magazine/cc534995.aspx . But when I tried to open the images which are more than 1200x1600, It is very slow. How to increase the performance. Is any one worked on Image processing in WPF. Please suggest me how to solve this perfomance issue in WPF for image(more than 1600x1200) operation. Thanks you, Harsha

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