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International Archives of the Photogrammetry, Remote Sensing and Spatial Information Sciences, Vol XXXV, Part B6. Istanbul 2004
The software is being developed in two languages: English and
Portuguese. The code, however, has comments only in English
(Figure 3), as it is widely known that English is the lingua
franca of programming. Qt has some features that make easier
internationalization of software generated with it, so, if there is
time (and demand), versions in other languages could be
benerated.
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CAMERA PARAMETERS REPORT {
har}, the furite i
A PARAMETERS Front |
à file, according to
site scie n Module
chard,
eain: Module
{char),strlen(\ncamera
Figure 3. Sic. source code (comments are pr eceded by “//”)
A deeper look into each one of the currently developed modules
will be postponed until next section. For now, the
implementation of other parts of the project will be explained.
For the on line help, simple html files were used. They do not
demand further explanation, mostly because Figure 4 is self-
explanatory.
The e-book was indeed the most difficult task. Before it was
written, there were only lecture notes on the subject at the MIE.
The idea of a full text to completely substitute them took about
two years and its appendices are yet unfinished. Currently,
there are about 200 A4 pages subdivided in ten chapters:
Introduction, Basic Principles of Photogrammetry, Interior
Orientation, Image Correlation, Exterior Orientation,
Aerotriangulation, Image Rectification and Normalization,
DTM Extraction, Ortho-Rectification and Digital Restitution.
As the e-book intends to be a part of E-FOTO, there is no point
in explaining Analog and Semi-analytical Photogrammetry.
Everything is explained according to a fully digital approach
and, when necessary, special references to old technologies that
might still be in use today are made. This is important: the e-
book is about Digital Photogrammetry, and not
Photogrammetry. Normally, students have to undergo all less
modern photogrammetric approaches before studying their
digital side. This e-book tries to explain Digital
Photogrammetry from the beginning, without previous
knowledge of Photogrammetry at all. The software, help and
support page will complement the user's learning experience.
97
S'iAULUE
Arauvo Egtor Exbr votos — Ferramentas
EYE: Pro
PY T Shows so 0 ST Giale on
Digital Photogrammetry that comes with E-FOTO
i About - Shaws some information on the E-FOTO
8 Project
1
i W- Exit - Closes the Camera Parameters Module
$ Meu computador
Figure 4. An example of the on line help
Unfortunately, the e-book, distributed through pdf files, is only
available in Portuguese. Its translation to English was, and still
is a priority for the future. It is a heavy task, though, and for
now, way too much time-consuming to be taken.
race tie pures Vents pre e nn
ET m& TX 65 -e ngogow-
xem J om OB =
Piped . e or on Digital Photogrammetry
The Portuguese version was considerably successful, however,
and the feedback received from the lusophone photogrammetric
community was so good that a 2" edition is already being
written. Figure 5 shows a sample page taken from Chapter 7.
As a multi-faceted project, a management tool was almost
mandatory, so, the free, web-based SourceForge was used. It
provides a CVS Repository (which grants access to every single
modification the sources have had) and a free web page. This is
actually the page from which WWW users can download the
software, the help files and the e-book. Its address is:
http://e-foto.sourceforge.net.
3.AN ÓVERVIEW OF E-FOTO
3.1Using E-FOTO
An example showing the educational approach of the software
is briefly shown in the following lines.
Let us suppose that the teacher wants to discuss about camera
calibration. He will, then, invite his students to use E-FOTO
for that. An ordinary student will click on the “Camera
Parameters" button of the main application. The screen shown
on Figure 6 will be presented.
