Bundle Block Adjustments in the practical Close Range applications Filippo Campolo Vincenzo Barrile University of Reggio Calabria Italy Racurs Conference, Jurmala 2005
Why this test ? Verify the results of four softwares mainly being used in Italian industry and targeting potential “PHOTOMOD” users, and to furnish useful suggestions to those peoples that operate in this sector. Verify if the results are suitable for monitoring architectural and monumental patrimony. Racurs Conference, Jurmala 2005
Some typical objects of monitoring Castle of San Niceto, Motta San Giovanni, Italy Racurs Conference, Jurmala 2005
Some typical objects of monitoring Racurs Conference, Jurmala 2005 Villa Zerbi, Reggio Calabria, Italy
Variety of softwares Commercial Expensive Cheap Racurs Conference, Jurmala 2005 Academic Only for the research For development
What of this software companies like to buy ? Mainly multifunction (total solution) Aerial-photogrammetry and Close Range Racurs Conference, Jurmala 2005
Softwares tested n n Bluh by Hannover University n Visual Giant by Ela. Soft n Racurs Conference, Jurmala 2005 Socet Set by LH-Systems PHOTOMOD by Racurs Latest versions
First object for test : Altar Racurs Conference, Jurmala 2005 Gold altar of Sant’Ambrogio in Milano
Second object for test : Façade Church of San Benedetto in Catania Racurs Conference, Jurmala 2005
Used equipments n n Distomat Di 3002 (1 mm) n Metric camera by Zeiss (9 x 13 cm) n Racurs Conference, Jurmala 2005 Theodolite Wild T 3000 (0. 1” angular) Vexcel Scanner (Scan 5 micron)
Scheme of strips with all points Racurs Conference, Jurmala 2005
Tie points measured Racurs Conference, Jurmala 2005
Control points marked and measured Racurs Conference, Jurmala 2005
Check points measured Racurs Conference, Jurmala 2005
Results of the test on the control points Racurs Conference, Jurmala 2005
Results on the control points from Socet Set Racurs Conference, Jurmala 2005
Results on the control points from Bluh Racurs Conference, Jurmala 2005
Results on the control points from Visual Giant Racurs Conference, Jurmala 2005
Results on the control points from PHOTOMOD Racurs Conference, Jurmala 2005
Results the test on the check points Racurs Conference, Jurmala 2005
Differences check points: Socet Set Racurs Conference, Jurmala 2005
Differences check points: Bluh Racurs Conference, Jurmala 2005
Differences check points: Visual Giant Racurs Conference, Jurmala 2005
Differences check points: PHOTOMOD Racurs Conference, Jurmala 2005
Conclusion n Racurs Conference, Jurmala 2005 A block adjustment is never perfect. If the adjustment residual errors exceed the tolerance, a great deal of imagination is required to visualize the source of the problem from error values, which only describe the deformation in numerical terms. After analyzing the errors, the photogrammetrist will often revisit the point marking or mensuration process, and then discard or statistically weight certain points and re-process the data to obtain a better adjustment.
n n Modern bundle block adjustment programs also directly output model parameter, including control and image points’ ground coordinates, residual errors in the original measurements and the adjustment, and all-important bundle parameters ( Xo, Yo, Zo, Omega, Phi, Kappa), which define location and attitude of each aerial and close range photograph. For that it is impossible to say which is the best: Socet Set Bluh Visual Giant PHOTOMOD ALL GIVE GOOD RESULTS IN THE BUNDLE BOCK ADJUSTMENT Racurs Conference, Jurmala 2005
WHICH ONE IS THE BEST OUT OF THE FOUR? Our opinion is that the results coming from “PHOTOMOD” are very good, and it is very interesting software to be used in close range applications. IT IS FOR YOU TO CHOOSE Racurs Conference, Jurmala 2005
Thanks for attention and arrivederci Filippo Campolo and Vincenzo Barrile University of Reggio Calabria Italy Racurs Conference, Jurmala 2005
Скачать презентацию Bundle Block Adjustments in the practical Close Range
14699d5bc95992ff62fa3515730530a8.ppt