gradient

I am using Ubuntu 11.10. I have installed ImageMagick from the latest source package. Here is the output from "convert -version" Version: ImageMagick 6.7.6-6 2012-04-19 Q16 http: // www.imagemagick.org Copyright: Copyright (C) 1999-2012 ImageMagick Studio LLC Features: OpenMP I am trying to convert an svg into a png which works great unless I have a gradient on some part of the image. Here is the command I am running: convert RedPoweredByPenguins.svg redpenguin.png Here is the SVG: http://gamepsychos.com/penguinCheckers/redPenguin.svg And here is the png it creates: http://gamepsychos.com

I have a problem whereby I want to estimate the gradient of the line on the contour. Please note that I dont need the pixel gradient but the rate of change of line. If you see the attached image, you will see a binary image with green contour. I want to label each pixel based on the gradient of the pixel on the contour. Why I need the gradient is because I want to compute the points where the gradient orientation changes from + to - or from - to +. I cannot think of a good method, to estimate this point on the image. Could someone help me with suggestion on how I can estimate this points. Here

Introduction I'm currently developing a small drawing application similar to MugTug's Sketchpad . There's one pretty annoying issue I haven't managed to get around yet, though. Drawing Algorithm My basic draw algorithm is similar to the one used by MugTug. Basically it just stamps images using drawImage while the user is drawing. There's one serious handicap. The algorithm begins to fail with low alpha. You can see this easily in the MugTug's tool by setting brush settings in the following way: diameter -> 100, hardness -> 1, flow -> 100, opacity -> 2 (1 is too small! bug in the app?). There

Closed . This question needs to be more focused . It is not currently accepting answers. Want to improve this question? Update the question so it focuses on one problem only by editing this post . Closed 2 years ago . I have some experience making linear gradients in CSS but I would really like to make a radial gradient similar to this image http://i.stack.imgur.com/T85xO.png Basically a light grey radial positioned at the bottom of the element Radial gradients are in an implementation mess right now, Safari doesn't support elliptical radial backgrounds (Webkit Nightly does, so support for

I'm creating an application for iOS 5 and I'm drawing some gradients. The following gradient code I've always used before ARC, but now it does not work on my device anymore (however, it works on the simulator) when I use it several times (so I suppose it's a memory management issue). Anyways, here's the code: CGColorSpaceRef colorSpace = CGColorSpaceCreateDeviceRGB(); CGFloat locations[] = { 0.0, 1.0 }; NSArray *colors = [NSArray arrayWithObjects:(__bridge id)startColor, (__bridge id)endColor, nil]; CGGradientRef gradient = CGGradientCreateWithColors(colorSpace, (__bridge CFArrayRef) colors,

To simplify the problem, say when a dimension (or a feature) is already updated n times, the next time I see the feature, I want to set the learning rate to be 1/n. I came up with these codes: def test_adagrad(): embedding = theano.shared(value=np.random.randn(20,10), borrow=True) times = theano.shared(value=np.ones((20,1))) lr = T.dscalar() index_a = T.lvector() hist = times[index_a] cost = T.sum(theano.sparse_grad(embedding[index_a])) gradients = T.grad(cost, embedding) updates = [(embedding, embedding+lr*(1.0/hist)*gradients)] ### Here should be some codes to update also times which are