Digital Photogrammetry

A Practical Course

verfasst von: PD Dr. Dr. -Ing. Wilfried Linder

Verlag: Springer Berlin Heidelberg

Enthalten in: Springer Professional "Wirtschaft+Technik" , Springer Professional "Technik" , Springer Professional "Wirtschaft"

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Über dieses Buch

1.1 Basic idea and main task of photogrammetry If you want to measure the size of an object, let’s say the length, width and height of a house, then normally you will carry this out directly at the object. Now imagine that the house didn’t exist anymore – it was destroyed, but some historic photos exist. Then, if you can determine the scale of the photos, it must be pos- ble to get the desired data. Of course you can use photos to get information about objects. This kind of - formation is different: So, for example, you may receive qualitative data (the house seems to be old, the walls are coloured light yellow) from photo interpre- tion, or quantitative data like mentioned before (the house has a base size of 8 by 6 meters) from photo measurement, or information in addition to your background knowledge (the house has elements of the “art nouveau” style, so may be c- th structed at the beginning of the 20 century), and so on.

Inhaltsverzeichnis

Frontmatter

1. Introduction

Abstract

If you want to measure the size of an object, let’s say the length, width and height of a house, then normally you will carry this out directly at the object. Now imagine that the house didn’t exist anymore — it was destroyed, but some historic photos exist. Then, if you can determine the scale of the photos, it must be possible to get the desired data.

Wilfried Linder

2. Included software and data

Abstract

If you want to use the software included on the CD-ROM and work with the example data or even use your own materials, it is necessary to have an adequate PC supplied with sufficient main memory (RAM), storage capacity (hard disk) and high resolution graphics. In particular, you need:

Wilfried Linder

3. Scanning of photos

Abstract

A lot of scanners exist on the market with differences in construction, geometric and radiometric resolution, format size and last but not least price. For use in photogrammetry, some basic requirements must be fulfilled: Format A3, transparency unit (for film material), high geometric and radiometric resolution and accuracy.

Wilfried Linder

4. Example 1: A single model

Abstract

To work with the LISA programmes, it is necessary first to define a project or to select one already existing. All projects which we will use during the following tutorials are prepared and have been copied onto your computer in the installation process. Nevertheless, this is a good moment to take a look at this topic.

Wilfried Linder

5. Example 2: Aerial triangulation

Abstract

If LISA FOTO is still running, go to File > Select project and choose the project TUTOR_2.PRJ or, if you have to start LISA FOTO anew, select this project. If necessary, go to File > Edit project and change the path of your working directory (see chapter 4.1).

Wilfried Linder

6. Example 3: Some special cases

Abstract

In this 3^rd tutorial, we want to learn some aspects about the handling of special or untypical cases and examples of close-range photogrammetry. What we did until now was to manage data which is typical for (digital) aerial photogrammetry and which of course can be processed with professional software packages — may be, even more comfortably and accurately with them.

Wilfried Linder

7. Programme description

Abstract

In this chapter, a brief description of LISA FOTO and BLUH is given. Of course, most of it you will already know if you have followed our tutorials. Nevertheless it might be good to have a summary for a quick reference. Thanks to Jörg Jozwiak, Berlin, for the translation of this chapter from German to English!

Wilfried Linder

Backmatter

Titel: Digital Photogrammetry
verfasst von: PD Dr. Dr. -Ing. Wilfried Linder
Verlag: Springer Berlin Heidelberg
Electronic ISBN: 978-3-540-92725-9
Print ISBN: 978-3-540-92724-2
DOI: https://doi.org/10.1007/978-3-540-92725-9