Unfortunately it is not possible to create a real blur overlay with CSS for all browsers at the moment. Only webkit has the backdrop-filter. But all other browsers mostly support a blur filter. This will not really work like a overlay, more like a filter that will be propagated bottom-up. In other words, the filter works only for a hole element or not. It's impossible to have something like a div overlay element that blurs only a part of an image like the backdrop-filter.

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You will start thinking about image sprites, if you see that your website has too many requests just because of some background images. An image sprite can combine many single requests from a browser to the server into one request. We just have to combine our background images into one single image and use the CSS property background-position. It's just getting complicated if you have a transition on the background.

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A small tool to show the differences between two texts. Similar to the command git diff. I was motivated to write the algorithm on my own in Javascript, but there already exists an excellent implementation by Kevin Decker that is called jsdiff.

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The uWave: Accelerometer-based Gesture Recognition project from the Rice Efficient Computing Group inspired me to build a small real time HTML based signature identification with Javascript. Actually gestures have not that much incommon with drawn handwriting, but I wanted to test dynamic-time-warping on signatures. I am not sure if there is a real usecase for a signature identification in web applications, but it was fun to build this kind of prototyp. Feedback is welcome.

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I'm starting to digitalise many of my old tapes and vinyls. The final result should be my own multimedia center on a Raspberry Pi. Also important for me are my old DVDs. Today I would like to show, how to rip a DVD on Linux with HandBrake.

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I would like to collect here a small set of random value generators that I use pretty often.

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I guess some will smile about this post. But for me it wasn't that trivial to cut an object exactly in half with Inkscape. Maybe there are better ways to do that, but here is my simple one.

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I have some old compact cassettes or tapes that I would like to digitalise before time is destroying the quality completely. I will document the digitization with this post.

Digitalise cassette tape

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I bought myself a Nintendo Wii Remote Plus controller. Interesting for me are the acceleration data. Since it was not trivial to me, I will show in this post how I have connected a Wii Remote Plus controller with my notebook that runs Debian 8 Jessie.

Nintendo Wii Remote Plus

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Bootstrap responsive embed can be very helpful to show responsive PDF files or videos. But it supports only the aspect ration 16by9 and 4by3. But what about other aspect rations? For example 210by297 would be interesting to embed a A4 paper.

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