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  • Laplacian of gaussian filter use

    - by maximus
    This is a formula for LoG filtering: Also in applications with LoG filtering I see that function is called with only one parameter: sigma(s). I want to try LoG filtering using that formula (previous attempt was by gaussian filter and then laplacian filter with some filter-window size ) But looking at that formula I can't understand how the size of filter is connected with this formula, does it mean that the filter size is fixed? Can you explain how to use it?

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  • Getting Greyscale pixel value from RGB colourspace in Java using BufferedImage

    - by Andrew Bolster
    Anyone know of a simple way of converting the RGBint value returned from <BufferedImage> getRGB(i,j) into a greyscale value? I was going to simply average the RGB values by breaking them up using this; int alpha = (pixel >> 24) & 0xff; int red = (pixel >> 16) & 0xff; int green = (pixel >> 8) & 0xff; int blue = (pixel) & 0xff; and then average red,green,blue. But i feel like for such a simple operation I must be missing something...

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  • overlay two images in android to set an imageview

    - by John
    I am trying to overlay two images in my app, but they seem to crash at my canvas.setbitmap line. what am I doing wrong? private void test() { Bitmap mBitmap = BitmapFactory.decodeResource(getResources(), R.drawable.t); Bitmap mBitmap2 = BitmapFactory.decodeResource(getResources(), R.drawable.tt); Bitmap bmOverlay = Bitmap.createBitmap(mBitmap.getWidth(), mBitmap.getHeight(), mBitmap.getConfig()); Canvas canvas = new Canvas(); canvas.setBitmap(bmOverlay); canvas.drawBitmap(mBitmap, new Matrix(), null); canvas.drawBitmap(mBitmap2, new Matrix(), null); testimage.setImageBitmap(bmOverlay); }

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  • How to upload images from iPhone

    - by Karthik.K
    Hi, I;m new to iPhone application development. I need to design an app to upload images from my iPhone to a HTTP Server. I tried following this http://stackoverflow.com/questions/125306/how-can-i-upload-a-photo-to-a-server-with-the-iphone/2528575#2528575, but did not taste success. Please help me out. :) Thanks! :)

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  • Converting .eps to .jpg

    - by Slinky
    Our print team saves raster images as .eps files. We need to convert about 11000 .eps to .jpg. We are using ImageMagick (with Ghostprint) on Linux. The conversion occurs but the resulting .jpg is not the same size as the source .eps - It's about 1/2 the size. Probably a problem converting a vector to a raster. Any way to solve this?

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  • Rotating images + content - jQuery or MooTools?

    - by Lenwood
    I've found a feature on two different websites that I'd like to include on one of my web projects, but I can't figure out how they're doing it. I think they're using either jQuery or mootools, but I'm not sure. http://www.x-plane.com/index_desktop.html I'm new here so I don't have the reputation to post the other link, but if you do a Google search for "Andrews Institute of Orthopaedics" its the top result. I'll see if I can answer a few questions to earn my keep. The thing that I like about these is that the images and text (including links) are all rotated together. I've done a few web searches related to cycle, rotate and slide but it's not coming together for me. Can anyone give me a nudge in the right direction?

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  • Face recognition Library

    - by Janusz
    I'm looking for a free face recognition library for a university project. I'm not looking for face detection. I'm looking for actual recognition. That means finding images that contain specified faces or libraries that calculate distances between specific faces. I'm using OpenCV for detecting the faces and a rough Eigenfaces Algorithm for the recognition now. But I thought there should be something out there with a better performance then a self written Eigenfaces Algorithm. I don't talk about speed as performance I'm looking for a library with better results as an simple Eigenfaces approach I took a look at faint but it seems the library is not very reusable for my own applications. I'm happy with a library in Python, Java, C++, C or something like that. The best thing would be if it can be run on a Windowsmachine

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  • Finding specific pixel colors of a BitmapImage

    - by Andrew Shepherd
    I have a WPF BitmapImage which I loaded from a .JPG file, as follows: this.m_image1.Source = new BitmapImage(new Uri(path)); I want to query as to what the colour is at specific points. For example, what is the RGB value at pixel (65,32)? How do I go about this? I was taking this approach: ImageSource ims = m_image1.Source; BitmapImage bitmapImage = (BitmapImage)ims; int height = bitmapImage.PixelHeight; int width = bitmapImage.PixelWidth; int nStride = (bitmapImage.PixelWidth * bitmapImage.Format.BitsPerPixel + 7) / 8; byte[] pixelByteArray = new byte[bitmapImage.PixelHeight * nStride]; bitmapImage.CopyPixels(pixelByteArray, nStride, 0); Though I will confess there's a bit of monkey-see, monkey do going on with this code. Anyway, is there a straightforward way to process this array of bytes to convert to RGB values?

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  • manu help me in the effect

    - by tismon
    http://www.zazzle.com/cr/design/pt-mug this is just a demo site. i am suppose to do something like this in PHP. can any one tell how this can be done with PHP ? what is the logic behind this ? is this possible with jquery or GD Library ? please help me.. thanks and regards tismon

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  • Is there an offline version of Smush.it available?

    - by Jonathon Watney
    Sometimes I use Smush.it via the YSlow Firefox plugin to non-destructively reduce the file size of JPG images. Is there an offline version available that runs on Windows? And if not is there an alternative? The reason I'd like an offline version is that I'd like to optimize images before I deploy them. Currently Smush.it accepts only public facing URLs for images or a web page (via YSlow) and can't access my internal network. That means I have to deploy, optimize, replace images and deploy again. I'd really like to deploy the optimized images on the first deploy. Update: Here's a very similar question.

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  • How can I duplicate the UI functionality of Google Fastflip?

    - by marcamillion
    Trying to get the same functionality as Google FastFlip. Not just with the thumbnails, but even for the larger images too. Notice how when you click on a story, you see the main story front and center, and you see smaller half-screens of previous and next stories. How can I get that functionality? Is there a plugin for one of the JS frameworks that does this already? I also love the speed and feel of flipping through the images.

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  • RUBY: Require 'RMagick' not working?

    - by igniteflow
    Hi, I have installed RMagick on OSX via MacPorts and can see it by running 'gem server'. However when I try to include it in my script using require 'rubygems' require 'RMagick' It crashes with the following error message ./RMagick.rb:4:in `show_info': uninitialized constant Magick (NameError) from ./RMagick.rb:24 from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require' from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `require' from ./rmagick.rb:1 from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `gem_original_require' from /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/1.8/rubygems/custom_require.rb:31:in `require' from get_pixels.rb:2 Could anyone tell me what I'm doing wrong?

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  • URL-&coordinate based screen capturing tool

    - by Enrico Stahn
    Hello, I'm searching for a screen capturing tool which captures areas of an website/web-application based on the url. The very best for me would be an firefox/ie addon with an API accessible via javascript. Example: URL, Coordinates, Filename http://foo.com/project/show/33; rectangle:10,10,50,50; myapp-area1.jpg http://foo.com/project/show/33; rectangle:100,100,150,150; myapp-area2.jpg

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  • Simplex noise vs Perlin noise

    - by raRaRa
    I would like to know why Perlin noise is still so popular today after Simplex came out. Simplex noise was made by Ken Perlin himself and it was suppose to take over his old algorithm which was slow for higher dimensions and with better quality (no visible artifacts). Simplex noise came out in 2001 and over those 10 years I've only seen people talk of Perlin noise when it comes to generating heightmaps for terrains, creating procedural textures, et cetera. Could anyone help me out, is there some downside of Simplex noise? I heard rumors that Perlin noise is faster when it comes to 1D and 2D noise, but I don't know if it's true or not. Thanks!

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  • convert RGB values to equivalent HSV values using python

    - by sree01
    Hi, I want to convert RGB values to HSV using python. I got some code samples, which gave the result with the S and V values greater than 100. (example : http://code.activestate.com/recipes/576554-covert-color-space-from-hsv-to-rgb-and-rgb-to-hsv/ ) . anybody got a better code which convert RGB to HSV and vice versa thanks

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  • actionscript 3.0 load images dynamically

    - by johnny
    I am making a photo slideshow in flash and would like to be able to load images dynamically from a folder. So that whenever i have a new photo i can just stick it in a folder and have my swf file read from that folder and update the slideshow. Is this doable in actionscript 3.0? if so any pointers would be helpful. thanks!

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  • WPF : how can i use a picture while i'm showing it?

    - by Roy Gavrielov
    hello, i'm trying to do so but the program throws this exception : An unhandled exception of type 'System.IO.IOException' occurred in mscorlib.dll Additional information: The process cannot access the file 'C:\Users\Roy\documents\visual studio 2010\Projects\Assignment3\Assignment3\bin\Debug\Images\Chrysanthemum.jpg' because it is being used by another process. is there a way to use it while it's open? code : if (imgAddMessage.Source != null) { BitmapImage src = (BitmapImage)imgAddMessage.Source; if (!Directory.Exists("Images")) { Directory.CreateDirectory("Images"); } FileStream stream = new FileStream("Images/" + imageName, FileMode.Create, FileAccess.ReadWrite); JpegBitmapEncoder encoder = new JpegBitmapEncoder(); encoder.Frames.Add(BitmapFrame.Create(src)); encoder.Save(stream); stream.Close(); } thanks.

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  • load images dynamically on scroll in blackberry

    - by Maneesh
    How to display images in the form of pages where only one page is displayed at a time on blackberry screen. On scrolling down subsequent images will load at run time. So that loading of images do not consume time at startup. Edit: I am using loadimage function which loads images from blackberry device memory which loads images from specified path and resizing them.As number of images increases, it increases the startup time during opening of window.There is an in-built application(Media) in blackberry phone, where images load without taking any extra time. My idea is to display particular number of images which fit to the blackberry screen. As user scroll down to bottom of screen, application will then load and display more images. So my question is how to detect when user reached to bottom of blackberry screen and display one more row images.

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  • Best Practice for Uploading Many (2000+) Images to A Server

    - by bob
    Hello, I have a general question about this. When you have a gallery, sometimes people need to upload 1000's of images at once. Most likely, it would be done through a .zip file. What is the best way to go about uploading this sort of thing to a server. Many times, server have timeouts etc. that need to be accounted for. I am wondering what kinds of things should I be looking out for and what is the best way to handle a large amount of images being uploaded. I'm guessing that you would allow a user to upload a zip file (assuming the timeout does not effect you), and this zip file is uploaded to a specific directory, lets assume in this case a directory is created for each user in the system. You would then unzip the directory on the server and scan the user's folder for any directories containing .jpg or .png or .gif files (etc.) and then import them into a table accordingly. I'm guessing labeled by folder name. What kind of server side troubles could I run into? I'm aware that there may be many issues. Even general ideas would be could so I can then research further. Thanks! Also, I would be programming in Ruby on Rails but I think this question applies accross any language.

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  • two galleryView on the same page problem!

    - by user334922
    I'm using two galleryView on the same page, but the navigation control get crazy, and navigate the worng gallery sometimes.i think is because the gallery create the frame with the same name. how can i fix? $('#photos').galleryView({ panel_width: 650, panel_height: 400, frame_width: 60, frame_height: 60, transition_speed: 1200, transition_interval:0, border: 'none', nav_theme: 'dark' }); $('#videos').galleryView({ panel_width: 650, panel_height: 400, frame_width: 60, frame_height: 60, transition_speed: 1200, transition_interval:0, border: 'none', nav_theme: 'dark' });

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