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Category: Data Mining

Field Scanning

Field Scanning

Here I’ll cover how sensors can collect readings from an environment and represent those readings in a practical way.  The most common field scanning devices are flat bed scanners and cameras.  These devices either have a line of sensors or an array of them to take readings quickly.  Flat bed scanners typically have a line of sensors that detect light and color.  As the sensors move along the surface of an object, typically paper, they buffer the readings into memory. …

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FOV – Field of View

FOV – Field of View

How can measurements be made when you can’t directly measure them?  Measuring the height of a building could be done by someone hanging a string from the rooftop and then measuring the string.  What if you can’t get access to the rooftop?  What if you needed to measure the span of a lake or height of a mountain?  Good luck using that string.  Here is how FOV can be used as a measurement tool for objects in pictures, videos, etc. …

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3D Rendering from Facebook Videos

3D Rendering from Facebook Videos

First, source your video from facebook.  I used a video shot from a motorbike of a structure on side of the road.  It was from a post of a road trip in Indonesia by a fellow with my same name.  The scene reminded me of my travels in the Southwest Pacific when I was younger.  It looked like good material as a source for model rendering. For more information on the following steps, see this link for the details.  I…

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Multimedia Meta-data – More than meets the eye

Multimedia Meta-data – More than meets the eye

It is time to step back from system administrative tasks and move back into the subject of digitized multimedia data processing.  The subject is a vast ever evolving beast.  Multimedia basically consists of some combination of visual or auditory information.  With digitized multimedia, additional data can be layered which provides any number of uses. In this post, I’ll be focusing on image file meta-data.  There are several levels and flavors of meta-data which I won’t cover in detail here.  However,…

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RPi Network Packet Analysis Tooling

RPi Network Packet Analysis Tooling

In this post, I’ll cover using the Rpi as a network analysis tool. The hardware of the Rpi and the open source software that runs on it is an extremely cost effective method to network diagnostics and troubleshooting. The hardware layout I’ll be using is fairly simple. The Rpi 3 has built in interfaces for both wired and wireless connections. I’ll be using the wired connection as my packet sniffing port. It will not have any IP bound to it….

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Cacti Custom Graphing Features

Cacti Custom Graphing Features

The default graphs that ship with Cacti provide a good starting point for your monitoring needs. However, you may find that the graphs don’t draw attention to what you would like. In this post, I’ll cover steps to customize your graphing functions. Also, we’ll cover ways to get more text information on your graphs, so lets begin. The default network traffic graph is reminiscent of the days of MRTG. I like to set my graph with both inbound and outbound…

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Raspberry Pi 3 GQRX SDR

Raspberry Pi 3 GQRX SDR

The Raspberry Pi 3 has enough power to run applications that were out of reach of earlier versions.  Software Defined Radio, commonly known as SDR, is such an application.  There are several program options that can be installed.  I’ll be covering GQRX because it powered by GNU-Radio and Qt.  You can find more information about the software at http://gqrx.dk/ Installing gqrx is done by follownig the instructions outlined on the GQRX developer’s website, http://gqrx.dk/download/install-ubuntu Here is an excerpt. For Ubuntu…

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Academic Roundup

Academic Roundup

Summary – it’s getting closer So far, there has been 15 of 20 posts that have stayed on topic with the goals defined at the beginning of this years studies.  I’ve managed to release at least 3 posts per month that covered the intended material.  Here’s a list of those topics based on grouping. Raspberry Pi Specific Raspberry Pi – The basics Command and control as easy as RPi RPi email using sSMTP RPi Backup and Restore Hardware Selecting an…

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Spring Heartbreak

Spring Heartbreak

RPi Dashcam Here’s a step by step using raspivid, super simple. RPi Bluetooth and WiFi I found it much easier to just use a USB adapter Edimax EW-7811Un, these instructions make it look easier than what I experienced with Adafruits “Ourlink” adapters.  I think my new AP doesn’t support the Ourlink band, so I had a sourlink. Here’s one from Plugable. BLE Revisited Bluetooth basic tutorial – from Sparkfun BC118 BLE Mate 2 Hookup Guide – from Sparkfun…don’t get too…

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Augmented reality

Augmented reality

Introduction – seeing what is relative This will be more of an introduction on the topic of augmented reality.  It will be platform independent, but it may make reference to various types of devices.  Basically it is creating a visual experience that is a combination the natural world and digital. The concept of enhancing a visual object, in real time, with detail is the idea behind augmented reality.  Its easier to explain with application that to describe it outright.  Grocery…

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