Category Archives: Python

Installing openCV at WebFaction with Python2.5

Just to follow up on my earlier post about building openCV on a Mac (Leopard), here are some notes for installing openCV 2.1 at WebFaction to default to using Python 2.5 (rather than 2.7). The wiki guide to use cmake didn’t quite work, I went ahead with ccmake (the command-line GUI equivalent): ccmake -D CMAKE_BUILD_TYPE=RELEASE […]

Automatic plaque transcription (py+tesseract) average error down to 33.4

A month back I posted about my progress with the automatic English Heritage plaque transcription project using Optical Character Recognition (using tesseract) and Python for OpenPlaques. The post mentions a monthly cash prize for progress towards a solution… A few days back Jonathan Street announced his entry in the challenge’s thread – he’d beaten my […]

Automatic Plaque Transcription using Python (work in progress)

I’m working with the OpenPlaques folk to create a system that automatically ‘reads’ images of English Heritage plaques and extracts a transcript of the plaque’s text. This is a classic optical character recognition project. Here’s a simple example (thanks Fiery Fred): The text is very easy for a human to read but very hard for […]

Building a face-tracking robot (Headroid1) with Python in an afternoon

Here we’ll look at building Headroid1 in a few hours – a face tracking 2-axis robot head controlled by Python and open source modules. UPDATE see Headroid featured in The Gadget Show in the 3 minute video made at MakerFaire UK 2011. This is what the finished system will look like: An earlier demo was […]

pyOpenCV facedetect.py demo (face detection with Python)

When I first played with openCV I had no idea how good the facial detection would be, or how fast it might run on my MacBook. I’m recording this demo so you’ll know what to expect… pyOpenCV is the Python binding to the open source openCV (originally created by Intel for vision research). It comes […]

Open Allure DS conversational interface (using Python)

Back at Christmas I was speaking to John Graves about his Open Allure DS PhD project – a conversational interface written in Python. The project has moved wonderfully forward over the past few months, I’ll summarise some of the features of Open Allure here. Sidenote – if you prefer podcasts then John was recently interviewed […]

Installing openCV 2.1 with Python bindings on Mac Leopard

I had a tricky time installing openCV 2.1 on my 10.5 Mac (Leopard) recently, the build instructions aren’t brilliant in the wiki. Here are my notes. I used the Mac notes as a guide and followed the new-style CMake system to build from scratch. I made sure during ‘cmake -G’ that new-style Python support was […]