Category Archive: Recommended

Oct 13

Touch up your sound with SoundTouch [w/code]

Screen Shot 2014-10-13 at 11.55.42 AM

How to stretch or compress sound easily without changing pitch using the excellent SoundTouch library, with a little help from Qt.

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Jul 01

Push a file to your Smartphone

This is a quick tip. If you need to push a notification to your smartphone, or even send a file, I recently stumbled upon "Pushbullet". I was looking for a solution to send a file (with automatic download) to my phone, via bash script on my raspberry pi. I've been using pushover for a while, …

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Nov 04

How I fell for QGLViewer for my Qt/OpenGL projects [w/ code]

A simple quick recipe for using OpenGL in Qt environment using libQGLViewer

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Aug 09

Useful ImageMagick and FFmpeg shortcuts for Win SendTo menu

shell-sendto

Hello Quickly sharing some useful scripts I've "developed" over the summer to cope with some image resizing / video ripping / transcoding, etc. Instead of using some specialized GUI software for transcoding I thought why not simply put useful options in the Windows file browser "Send To..." context menu. That way I can right-click the …

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Jun 01

The Raspberry Pi is Here

060112_0541_TheRaspberr1.jpg

A few months back I placed an order for a raspberry pi. For those who don't know what it is, it is a really cool project which is basically a computer for 35$ (Shipping for me almost doubled it, but that's to be expected). It is a board, which as 256MB Ram, SD-Card slot, 2 …

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Apr 04

Bootloading an ATmega88 for Arduino [w/ code]

atmega88_bootloading

Just wanted to put up a small tut on how to put an Arduino bootloader on an ATmega88. I very roughly followed:  http://www.ladyada.net/learn/avr/avrdude.html And  http://itp.nyu.edu/physcomp/Tutorials/ArduinoBreadboard (Although they make it way too complicated) And ATMEL's datasheet for ATmega88 is also very good to have open at all times:  http://www.atmel.com/Images/2545s.pdf First, put everything on a breadboard: (This took …

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Feb 29

Online places to buy hardware

Hi I always strive to be more open with my knowledge, so I decided to publish more posts of lesser "scientific" value and more just helpful stuff in various domains. This time I want to share a list of website where you can purchase hardware for hacking and building. Many are unhappy with the one-stop-shop …

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Feb 07

Structure from Motion and 3D reconstruction on the easy in OpenCV 2.3+ [w/ code]

Hello This time I'll discuss a basic implementation of a Structure from Motion method, following the steps Hartley and Zisserman show in "The Bible" book: "Multiple View Geometry". I will show how simply their linear method can be implemented in OpenCV. I treat this as a kind of tutorial, or a toy example, of how …

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Aug 25

A simple object classifier with Bag-of-Words using OpenCV 2.3 [w/ code]

A simple object classifier with Bag-of-Words using OpenCV 2.3

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Jun 17

Simple Kalman filter for tracking using OpenCV 2.2 [w/ code]

kalman using velocity

Hi, I wanted to put up a quick note on how to use Kalman Filters in OpenCV 2.2 with the C++ API, because all I could find online was using the old C API. Plus the kalman.cpp example that ships with OpenCV is kind of crappy and really doesn't explain how to use the Kalman …

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