IX 
INTRODUCTION 
During the last years, opto-electronic sensors have gained importance in areas such as photogrammetry, 
remote sensing, machine, robot and computer vision. They provide an effective way of fast image acquisition 
and the potential of automated image analysis. Digital images, in combination with on-line data evaluation, 
are a valuable tool for automating quality control and are of particular importance for recording kinematic 
processes, promising to revolutionize a wide range of measurement tasks. 
The ISPRS Intercommission Workshop "From Pixels to Sequences", whose proceedings constitute this 
publication, dealt with airborne sensors (CCD pushbroom scanners, laser rangers, spectrometers), new 
image recording systems (high resolution still video cameras, adaptive imaging sensors), geometric and 
radiometric performance evaluation of sensors, sensor calibration and orientation, algorithms for surface 
measurement, object reconstruction, motion estimation, tracking, and image sequence analysis, and close- 
range systems and applications in industry, medicine and dentistry, sports, forestry, art monitoring and 
preservation, and electronic microscopy. 
Some of the highlights of the workshop, many of them “firsts” for the ISPRS, include: 
* Cooperation of ISPRS Working Groups spanning three Commissions 
* 60 presented papers from 14 countries in a workshop 
* Nice mixture of academia (5596), research institutes (22%) and private companies (23%) 
* Participation of scientists from various disciplines (physics, optics, electrical engineering, computer sci- 
ence, machine vision etc.) ; only approximately one third of the authors are photogrammetrists! 
* Participation of many groups in international photogrammetric meetings for the first time 
* Publication of the proceedings in the ISPRS Archives Series 
Eighty abstracts were submitted and evaluated by the chairmen of the three ISPRS Working Groups 
organising the workshop. This high number of papers and the general interest that was expressed makes us 
confident that the issues that are dealt with in this publication are relevant to a great number of experts and 
users in the related fields. Sixty selected papers were presented in eleven Technical and two Poster Sessions 
(35 and 25 papers respectively). The papers are interesting, variable, but still coherent, in spite of the wide 
range of topics dealt with in the Workshop and the different backgrounds of the authors. Many of the papers 
deal with new developments - on sensors but also processing algorithms and systems - not previously 
published in the photogrammetric literature. Of particular value is the keynote lecture by Dr. Peter Seitz, Paul 
Scherrer Institute Zurich (former RCA Lab.), with title "From pixels to answers - recent developments and 
trends in electronic imaging", giving the state-of-the-art and future developments in electronic imaging. 
From this position | would like to thank all authors for their cooperation with the editor and their efforts to 
improve both form and content of their papers. The financial support of the Swiss Society for Photogrammetry, 
Image Analysis and Remote Sensing for the publication of the Proceedings is also acknowledged. 
Emmanuel P. Baltsavias 
Editor 
IAPRS, Vol. 30, Part 5W1, ISPRS Intercommission Workshop "From Pixels to Sequences", Zurich, March 22-24 1995