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Search found 603 results on 25 pages for 'rgb'.

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• Kohonen SOM Maps: Normalizing the input with unknown range

  - by S.N

  According to "Introduction to Neural Networks with Java By Jeff Heaton", the input to the Kohonen neural network must be the values between -1 and 1. It is possible to normalize inputs where the range is known beforehand: For instance RGB (125, 125, 125) where the range is know as values 0 and 255: 1. Divide by 255: (125/255) = 0.49 …

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• Qt 4.6 QLineEdit Style. How do I style the gray highlight border so it's rounded?

  - by krunk

  I'm styling a QLineEdit to have rounded borders for use as a search box. The rounding of the borders themselves were easy, but I can't figure out for the life of me how to round the highlighted portion of the widget when it has focus. I've tried QLineEdit::focus, but this only modifies the interior border. The images below show how…

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• Drawing RAW buffer to CGBitmapContext

  - by Raj

  Hi all, I have a raw image buffer in the RGB format. I need to draw it to CGContext so that I get a new buffer of the format ARGB. I accomplish this in the following way: Create a data provider out of raw buffer using CGDataProviderCreateWithData and then create image out of the data provider with the api: CGImageCreate. Now if…

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• Code golf: the Mandelbrot set

  - by Stefano Borini

  Usual rules for the code golf. Here is an implementation in python as an example from PIL import Image im = Image.new("RGB", (300,300)) for i in xrange(300): print "i = ",i for j in xrange(300): x0 = float( 4.0*float(i-150)/300.0 -1.0) y0 = float( 4.0*float(j-150)/300.0 +0.0) x=0.0 y=0.0 …

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• NSScanner scanFloat returning unexpected results

  - by E-Madd

  I'm trying to build a UIColor from a comma-delimited list of values for RGB, which is "0.45,0.53,0.65", represented here by the colorConfig object... NSScanner *scanner = [NSScanner scannerWithString:colorConfig]; [scanner setCharactersToBeSkipped:[NSCharacterSet characterSetWithCharactersInString:@"\n, "]]; float red, green,…

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• Alternative to BitConverter.ToInt32

  - by MusiGenesis

  I'm using BitConverter.ToInt32 to pack 3 byte values into an int, like so: byte R = 0; byte G = 0; byte B = 0; int i = BitConverter.ToInt32(new byte[] { R, G, B, 0 }, 0); Is there a faster way to do this that doesn't involve the creation of a new int each time? Getting the bytes out of an int is easy: int i = 34234; byte…

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• exchanging 2 memory positions

  - by Jordi

  I am working with OpenCV and Qt, Opencv use BGR while Qt uses RGB , so I have to swap those 2 bytes for very big images. There is a better way of doing the following? I can not think of anything faster but looks so simple and lame... int width = iplImage->width; int height = iplImage->height; uchar *iplImagePtr…

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• Masks and transparency

  - by Henrik

  Hi, I'm fairly new to Shoes and ran into two problems. First I want to set a mask using a partially transparent png, like this: mask do image "images/stencilMask.png" end Is this possible somehow or can only vector shapes be used? Apart from that, I noticed a small bug(?) when trying to set a transparent color as…

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• jQuery plugin: Colorpicker

  - by New Developper

  Hey all, I'm using this colorpicker (http://www.eyecon.ro/colorpicker) and am trying to capture the hex value so that I can use it on the server side to store the selected color. If you check out the link provided, I'm using the last option: $('#colorSelector').ColorPicker({ color: '#0000ff', onShow: function (colpkr) {…

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• How to work with BufferedImage and YCbCr colorspace?

  - by Onlyx

  Hi everyone! I need to translate colors in bitmap loaded to BufferedImage from RGB to YCbCr (luminance and 2 channels chrominance) and back after process. I made it with functions used like rgb2ycbcr() in main method for each pixel, but it isn't so smart solution. I should use ColorSpace and ColorModel classes to get…

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• How do I edit an interface builder object programmatically?

  - by Evelyn

  I created a label using Interface Builder, and now I want to set the background color of the label using code instead of IB's color picker. (I want to do this so that I can define the color using RGB and eventually change the colorspace for the label.) I'm in cocoa. How do I edit the attributes of an IB object…

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• Looking for PCA snippet/source code in C++

  - by jihchuan

  Hi, I'm currently developing a software to compare 2 images. I start with extract the image's RGB values, form a matrix of array and then attempt to compress the values using PCA, and then match/recognize it with a pre-set data to find its similarity. But I can't proceed with the PCA part. (I'm using C++, C also…

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• How to colorize section headings in LaTeX like this?

  - by Nazgulled

  Hi, Accidently I created this nice colored effect on my LaTeX TOC: http://i43.tinypic.com/o5aptl.png Which I like and want to keep, I created this effect like this: \definecolor{Section1}{rgb}{0.09,0.21,0.36} \section{\color{Section1}Introdução} However, as you can see on the TOC sidebar, there was a nasty…

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• PIL saves image colour wrong

  - by Tom Viner

  I have an image. I want to resize it using PIL, but it come out like this. Even without a resize it still messes up the colour. Minimal code: from PIL import Image import os import urllib import webbrowser orig_url =…

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• Getting Windows XP colours in .NET

  - by LauraM

  I am trying to get a specific colour used by Windows XP in my .NET application. In Windows XP, if you go the Control Panel in 'category view', on the left hand side you have some 'See Also' options (Windows Update, Help…

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• can't get rid of top and bottom drop shadows

  - by Jawad

  Why with the following code, I still can't get rid of drop shadows at the top and bottom. Although the drop shadows are "small", yet still they are there. div#inner_container { width: 960px; margin: 0px auto;…

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• Improving the efficiency of Kinect for Windows DTWGestureRecognition Application

  - by Ray

  Currently I am using the DTWGestureRecognition open source tool for Kinect SDK v1.5. I have recorded a few gestures and use them to navigate through Windows 7. I also have implemented voice control for simple…

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• Find the closest vector

  - by Alexey Lebedev

  Hello! Recently I wrote the algorithm to quantize an RGB image. Every pixel is represented by an (R,G,B) vector, and quantization codebook is a couple of 3-dimensional vectors. Every pixel of the image needs…

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• jQuery - color cycle animation with hsv colorspace?

  - by Sgt. Floyd Pepper

  Hi there, I am working on a project, which I need a special body-background for. The background-color should cycle through the color spectrum like a mood light. So I found this: …

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• Fade a color to white (increasing brightness)

  - by Jon B

  I want to make a text box in .NET "glow" yellow, and then "fade" to white (basically, by incrementally increasing the brightness). I think Stackoverflow does this after you've…

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• Magick++ Read Image with ICC colorspace

  - by FlashFan

  Hi guys I need to know how I can read an image which uses a separate ICC Color Profile. The image consists of 26'099'520 Bytes which is the result of 2480 width* 3508 height…

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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…

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• Java Convert ColorSpace of BufferedImage to CS_GRAY without using ConvertColorOp

  - by gmatt

  I know its possible to convert an image to CS_GRAY using public static BufferedImage getGrayBufferedImage(BufferedImage image) { BufferedImageOp op = new…

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• Why does Color.IsNamedColor not work when I create a color using Color.FromArgb()?

  - by Jon B

  In my app I allow the user to build a color, and then show him the name or value of the color later on. If the user picks red (full red, not red-ish), I…

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• Safari does not show images, but FireFox does

  - by Elliot

  I have a website that I am working on: http://keramed.com in FireFox on my Mac the image on the main page shows up. (The Endoshield DSEK Graft…

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