Category Archives: Uncategorized

An average image

Following the definition found in this page, an average image is an image that gives equal weight to each of the component images, combining them to make a whole. Given a folder of the Kurenniemi’s archive, all its images would … Continue reading

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Browsing Erkki’s diary with the help of Paul Hough

During a large part of his life Kurenniemi has produced a diary. Under different forms, written by hand in notebooks, on his computer, in audio cassettes and video. I recently opened a notebook exported in pdf from mathematica conceived by … Continue reading

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Motion vectors

MPEG movies, when compressed, analyze the movement of pixel data and use “motion vectors” to help achieve data compression. Movie players, like mplayer, support showing this data as a “debugging” feature. This blog post discusses the mplayer feature, and here … Continue reading

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Faces of Kuvia

In our test folder Kuvia, we have many images taken daily by Erkki Kurenniemi. In order to detect which ones contain a human presence, we have run a  program written with Opencv using its python API. The algorithm that detects … Continue reading

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Thumbnails by time

We start working on the contents of the folder “kuvia” — Finnish for images — and just one of several folders of images. Of the approximately 17000 images, 12000 have EXIF data (straight from a digital camera). I write a … Continue reading

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EXIF Thumbnails

Working with the pyexiv2 library, discovered that images from digital camera’s typically have an embedded thumbnail image, available via standard metadata (EXIF) that is included within the image itself. Work with thumbnail images generated by the camera is interestesting in … Continue reading

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Associative Memory

While working on the image material in the digital archive, we listened to an audio recording of a lecture where Kurenniemi described the “associative memory” model of some of his early instruments where, in contrast with more conventional addressable memory, … Continue reading

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montage

With the following code, we created a montage of the images contained in the directories. Each directory has then a quick visual overview, very much like a contact sheet. #!/usr/bin/env python #-*- coding:utf-8 -*- import os, sys, Image from time … Continue reading

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The blind leading the blind

With privacy law, copyright, one can only look at an archive blindfolded. Before tedious negotiations take place, images, sounds, videos of the archive cannot be published. They still can remain in the archive though. Can we therefore access the archive … Continue reading

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Disk Usage Treemap

A treemap is a graphical visualisation technique developed in the 1990s by Ben Shneiderman that attempts to give a two dimensional representation of a hierarchy with some sense of relative scale. The Linux Disk Usage Analyzer (aka baobab) tool provides … Continue reading

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