Geography Reference
In-Depth Information
Terrestrial and aerial photographs can also be edited and manipulated with free programs
as GIMP, Photoshop, or Image Analyzer, that run on Windows and Mac operating systems.
They provide an array of useful features such as bitmap image viewing, management,
comparison, resizing, cropping, warping, and colour adjustment.
In terrestrial photogrammetric works GIMP compensates easily perspectives, distortions
caused by lens tilt, and eliminates len's
barrel distortion
and vignetting [12].
Figure 5.
Accurate drawing of the 16
th
century façade of the Colegio de San Ildefonso (Alcalá de
Henares, Spain), using photogrammetrical techniques (Task Group's Partner:
Cultural Heritage and
sustainable architecture
Research Team
, University of Alcalá, Spain).
Simultaneously, some researches require to collect other kind of data, which are related to
perception. These relevant attributes of the cultural object must be also recorded, stored and
drawn. Specific software and techniques are needed for studying some qualities as colour or
textures [13], and there is also free image and photo open source software available to do it,
as Photoshop and GIMPShop.
When tools for live video and sound recording are needed, Adapter free video and audio
converter, and the audio editor Audacity, become useful free tools for studying
soundscapes.
