Reviewing and Sharing SenseCam Images

The data recorded by the SenseCam can be downloaded onto a desktop or laptop computer, typically at the end of a day or week. Microsoft Research developed a simple viewer application that can be used to transfer the images in this way and then display them. The basis of the viewer, which is designed to be very straightforward to use, is a window in which images are displayed and a simple VCR-type control which allows an image sequence to be played slowly (around 2 images/second), quickly (around 10 images/second), re-wound and paused.

The fast-play option creates a kind of ‘flip-book’ movie effect – the entire event represented by the images is replayed as a time-compressed movie. Such rapid serial visual presentation (RSVP) techniques are well-studied in psychological literature1 and are particularly suited to SenseCam images. It is possible to delete individual images from the sequence if they are badly framed or of poor quality. An additional option is provided to correct for the ‘fish-eye’ lens effect using an algorithm, which applies an inverse model of the distortion.

It is also possible to import SenseCam image sequences into a more sophisticated application. MyLifeBits will allow the large number of images generated daily to be easily searched and accessed. Dublin City University have developed a sophisticated SenseCam image browser which assists in splitting sequences of images into different events by automatically analysing the images and sensor data generated by SenseCam. The Vicon Revue comes with a cross-platform image browser.

1See for example: Spence, R., “Rapid, serial and visual: a presentation technique with potential,” Information Visualization, 2005, Vol: 1, Pages: 13 - 19, ISSN: 1473-8716.

Sensors and Devices Group has a number of other exciting projects.