g.gui.photo2image - Corrects scanning distortions of a paper photo.
Contents
Description
This module is based on g.gui.gcp, the GCP manager of GRASS GIS. It is part of i.ortho.photo suite.
The aim of this module is to give absolute location values to the fiducial points present (in number of 4
or 8) in a scanned aerial photo.
This is necessary as (manual) scanning introduces distortions, rotations and also may not be limited to
scan the boundary of the photo itself. It is thus necessary to give to each fiducial the exact
coordinates in mm as given by the aerial photographic instrument design, which is unique per camera.
This module requires you to have made a group with your aerial photo (i.group), a camera description file
(i.ortho.target) and use them to launch the module. Additional requirements are the order of
rectification (1 if no of Fiducials is 4, 2 if no of Fiducials is 8) and an extension file (if not given,
defaults to \$filename_ip2i_out)
An example for project imagery60:
g.gui.photo2image group=aerial@PERMANENT raster=gs13.1@PERMANENT camera=gscamera order=2 extension=try --o
Screenshotofg.gui.photo2imageFigure:Screenshotofg.gui.photo2imageFor A Detailed Operation Manual Please Read
wxGUI,wxGUIcomponents
See also video tutorials on GRASS Wiki.
Keywords
imagery, GUI, aerial, photo, georectification, geometry, GCP
Name
g.gui.photo2image - Corrects scanning distortions of a paper photo.
See Also
i.ortho.photo,i.group,i.ortho.camera,i.ortho.target,i.rectify,m.transform,v.rectify
Source Code
Available at: wxGUI GCP Manager for photo to image registration source code (history)
Accessed: Friday Apr 04 01:21:41 2025
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© 2003-2025 GRASS Development Team, GRASS GIS 8.4.1 Reference Manual
GRASS 8.4.1 g.gui.photo2image(1grass)
Synopsis
g.gui.photo2imageg.gui.photo2image--helpg.gui.photo2imagegroup=nameraster=namecamera=stringorder=stringextension=string [--help]
[--verbose] [--quiet] [--ui]
Flags:--help
Print usage summary
--verbose
Verbose module output
--quiet
Quiet module output
--ui
Force launching GUI dialog
Parameters:group=name[required]
Name of input imagery group
raster=name[required]
Name of input raster map
camera=string[required]
The name of the camera (generated in i.ortho.camera)
The name of the camera (generated in i.ortho.camera)
order=string[required]
The rectification order (no of Fiducial=4 -> order=1, no of Fiducial=8 -> order=2)
The rectification order (no of Fiducial=4 -> order=1, no of Fiducial=8 -> order=2)
Default: 1extension=string[required]
The name of the output files extension (used in i.rectify)
The name of the output files extension (used in i.rectify)
Default: _ip2i_out