If you follow Markus' how-to, you may be interested in technical info concerning your camera :
Kodak DCS Pro SLR/n/c imager size : 36.0mm x 24.0mm pixel size : 7.9µm x 7.9µm see this page for other cameras : http://www.digitaldingus.com/reference/general/sensorsizes.php Good luck ! Vincent Le samedi 05 janvier 2008 à 23:25 +0800, Maning Sambale a écrit : > Salamat! > > Never expected such quick replies! > > A few more details: > Camera: Kodak Pro DCS 14N digital SLR camera > using a 19-35mm Tamron zoom lens set at 19mm focal length, 13.5 > megapixel resolution (4,500 x 3,000 pixels). > > Images are in Kodak DCR format. Converting to tif before export to > GRASS more than double the size. > > I have the following parameters for each image: > FILENAME > IMAGE NUMBER > DATE > TIME > GPS STATUS > LATITUDE > LONGITUDE > ALTITUDE > ISO SPEED > APERTURE > SHUTTER FOCAL LENGTH > > > unless you use a brute force approach with > > the orthorectified Quickbird imagery, i.e. at least 100 control points > > per image and the strongest rubbersheeting method available. > I think I'd go this route as a last resort, I have approximately 800 > images to rectify. > > > > > http://grass.gdf-hannover.de/wiki/Orthorectification_digital_camera > Thanks for this one > > >> > http://ojs.info.gscc.osaka-cu.ac.jp/IJG/index.php/IJG/article/view/103/42 > > and this one! > > We'll keep you posted as I do this. > > maning > > On Sat, 2008-01-05 at 14:44 +0100, Vincent BAIN wrote: > > Merci ! > > I'll try it soon... > > > > > > Le samedi 05 janvier 2008 à 14:21 +0100, Markus Neteler a écrit : > > > On Jan 5, 2008 1:56 PM, Vincent BAIN <[EMAIL PROTECTED]> wrote: > > > > > > > > Le samedi 05 janvier 2008 à 13:44 +0100, Markus Neteler a écrit : > > > > > > > > > On Jan 5, 2008 1:35 PM, Markus Metz <[EMAIL PROTECTED]> wrote: > > > > > ... > > > > > > Anyway, digital cameras are apparently not supported in > > > > > > i.ortho.photo. > > > > > > > > > > Why this? I did so, using a handheld digital camera: > > > > > > > > > > M. Neteler, D. Grasso, I. Michelazzi, L. Miori, S. Merler, and > > > > > C. Furlanello, 2005. An integrated toolbox for image registration, > > > > > fusion > > > > > and classification. International Journal of Geoinformatics. > > > > > Special Issue > > > > > on FOSS/GRASS 2004 & GIS-IDEAS 2004, 1(1), pp. 51-61, March 2005. > > > > > PDF: > > > > > http://ojs.info.gscc.osaka-cu.ac.jp/IJG/index.php/IJG/article/view/103/42 > > > > > > > > > > > I heard of some tools that can add fiducial marks to digital > > > > > > photographs > > > > > > > > > > You can use the photo corners and calculate things yourself using > > > > > "jhead" or other tools. > > > > > > > > You mean pointing corners of the image as four fiducials, then assigning > > > > them the dimensions of the sensor, in a coordinate system centered on > > > > the estimated principal point ? If you do that with i.ortho.photo what > > > > value would you give to the focal length, the one provided by the exif ? > > > > > > OK, I have added my draft recipe here: > > > http://grass.gdf-hannover.de/wiki/Orthorectification_digital_camera > > > > > > Feel free to improve the page. > > > > > > Markus > > > > > > > _______________________________________________ > > grass-user mailing list > > [email protected] > > http://lists.osgeo.org/mailman/listinfo/grass-user > > _______________________________________________ > grass-user mailing list > [email protected] > http://lists.osgeo.org/mailman/listinfo/grass-user > _______________________________________________ grass-user mailing list [email protected] http://lists.osgeo.org/mailman/listinfo/grass-user
