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Forensically is a set of free tools for digital image forensics. It includes clone detection, error level analysis, meta data extraction and more. It is made by Jonas Wagner. You can read a bit more about it in this blog post. You should think of forensically as a kind of magnifying glass. It helps you to see details that would otherwise be hidden. Just like a magnifying glass it can't tell true f
2012-03-02 - updated to use ruby 1.9.3 and official instead of system rvm. When trying to install ruby 1.9.2 using rvm I got a nasty suprise: ossl_ssl.c:110:1: error: ‘SSLv2_method’ undeclared here (not in a function) ossl_ssl.c:111:1: error: ‘SSLv2_server_method’ undeclared here (not in a function) ossl_ssl.c:112:1: error: ‘SSLv2_client_method’ undeclared here (not in a function) make[1]: *** [os
Neonflames is a tool to draw your own nebula!
I finally found a way to optimize 2d canvas drawing on the iPhone 4. Because of the retina display the canvas seems to be rescaled in a slow way (in software?). So even though the rendering itself is relatively fast, the end result is slow. Setting the Viewport The first step is to set the viewport scale to 0.5 which will result in having one pixel per css pixel. <meta name="viewport" content="wid
View the synthwave demo I’ve just released version 4.0 of simplex-noise.js. Based on user feedback the new version supports tree shaking and cleans up the API a bit. As a nice little bonus, it’s also about 20% - 30% faster. It also removes the bundled PRNG to focus the library down to one thing - providing smooth noise in multiple dimensions. The API Change The following bit of code should illustr
Yes we can! Thanks to the performance of modern javascript engines like V8 it is now possible to do realtime raytracing in javascript. Demo This demo requires a quick modern browser with support for the canvas tag and a fast computer. Google chrome seems to work best. Firefox is too slow. If it doesn't work make sure that your browser is not zooming in (hit ctrl+0 in chrome and firefox). How it wo
Last Saturday I have released my little javascript pathtracer that rendered a very simple scene. This time I want to show off some of the more advanced effects that can be simulated nicely using path tracing. I decided to set up a scene similar to the well known Cornell Box to demonstrate effects such as soft shadows, color bleeding, reflection, refraction and caustics. I did not include Depth of
Update: Newer WebGL based version This is an old experiment. I created a newer much faster webgl powered library for you to play with this technique. It's called normalmap.js. It allows you to easily apply normal mapping for interactive lighting effects in javascript. Original Article I made a little experiment with normal mapping and phong shading in javascript which turned out to work quite well
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