Systemafjellet

Dense Cloud Confidence 20-255 Filter Component Size: 99%

04 March 2022

Survey Data

1 2 3 4 5 6 7 8 9 > 9 50 m

Fig. 1. Camera locations and image overlap.

Number of images: 91 Flying altitude: 174 m Ground resolution: 3.89 cm/pix Coverage area: 0.0408 km² Camera stations: 91 Tie points: 16,765 Projections: 215,001 Reprojection error: 0.577 pix
Camera Model Resolution Focal Length Pixel Size Precalibrated
Test_Pro (10.26mm) 5472 x 3648 10.26 mm 2.41 x 2.41 μm No

Table 1. Cameras.

Camera Calibration

1 pix

Fig. 2. Image residuals for Test_Pro (10.26mm).

Test_Pro (10.26mm)

91 images

Type Resolution Focal Length Pixel Size Frame 5472 x 3648 10.26 mm 2.41 x 2.41 μm
Value Error F Cx Cy B1 B2 K1 K2 K3 P1 P2
F 4345.41 0.13 1.00 -0.13 0.08 -0.51 -0.20 0.07 0.06 -0.07 -0.12 0.25
Cx 6.30655 0.19 1.00 -0.15 0.10 0.55 -0.10 0.07 -0.06 0.93 -0.11
Cy -51.3155 0.21 1.00 -0.69 -0.08 0.03 -0.04 0.03 -0.15 0.65
B1 9.28225 0.12 1.00 0.05 -0.16 0.08 -0.05 0.11 -0.42
B2 0.424856 0.1 1.00 -0.01 0.01 -0.01 0.47 -0.09
K1 0.00610391 5.5e-05 1.00 -0.94 0.87 -0.09 -0.09
K2 0.0352664 0.0002 1.00 -0.98 0.06 0.04
K3 -0.0380146 0.00024 1.00 -0.06 -0.04
P1 -6.53618e-05 1.2e-05 1.00 -0.10
P2 -0.00392125 8.3e-06 1.00

Table 2. Calibration coefficients and correlation matrix.

Camera Locations

50 m -3 m -2.4 m -1.8 m -1.2 m -0.6 m 0 m 0.6 m 1.2 m 1.8 m 2.4 m 3 m x 10

Fig. 3. Camera locations and error estimates.

Z error is represented by ellipse color. X,Y errors are represented by ellipse shape.

Estimated camera locations are marked with a black dot.

X error (m) Y error (m) Z error (m) XY error (m) Total error (m)
0.480227 0.551516 1.03071 0.731292 1.26379

Table 3. Average camera location error.

X - Longitude, Y - Latitude, Z - Altitude.

Digital Elevation Model

50 m 210 m 50 m

Fig. 4. Reconstructed digital elevation model.

Resolution: 7.78 cm/pix Point density: 165 points/m²

Processing Parameters

General
Cameras 91
Aligned cameras 91
Coordinate system WGS 84 (EPSG::4326)
Rotation angles Yaw, Pitch, Roll
Point Cloud
Points 16,765 of 26,075
RMS reprojection error 0.223914 (0.576674 pix)
Max reprojection error 0.872073 (23.2451 pix)
Mean key point size 2.36718 pix
Point colors 3 bands, uint8
Key points No
Average tie point multiplicity 17.3442
Alignment parameters
Accuracy Highest
Generic preselection Yes
Reference preselection Source
Key point limit 40,000
Tie point limit 4,000
Exclude stationary tie points Yes
Guided image matching No
Adaptive camera model fitting Yes
Matching time 2 minutes 21 seconds
Matching memory usage 417.68 MB
Alignment time 41 seconds
Alignment memory usage 38.54 MB
Optimization parameters
Parameters f, cx, cy, k1-k3, p1, p2
Adaptive camera model fitting Yes
Optimization time 2 seconds
Software version 1.7.3.12473
File size 7.37 MB
Depth Maps
Count 91
Depth maps generation parameters
Quality High
Filtering mode Mild
Max neighbors 100
Processing time 11 minutes 6 seconds
Memory usage 6.24 GB
Software version 1.7.3.12473
File size 622.19 MB
Dense Point Cloud
Points 10,139,952
Point colors 3 bands, uint8
Depth maps generation parameters
Quality High
Filtering mode Mild
Max neighbors 100
Processing time 11 minutes 6 seconds
Memory usage 6.24 GB
Dense cloud generation parameters
Processing time 35 minutes 3 seconds
Memory usage 7.19 GB
Software version 1.7.3.12473
File size 318.54 MB
Model
Faces 2,027,703
Vertices 1,017,106
Vertex colors 3 bands, uint8
Texture 4,096 x 4,096 x 10, 4 bands, uint8
Depth maps generation parameters
Quality High
Filtering mode Mild
Max neighbors 100
Processing time 11 minutes 6 seconds
Memory usage 6.24 GB
Reconstruction parameters
Surface type Arbitrary
Source data Dense cloud
Interpolation Enabled
Strict volumetric masks No
Processing time 8 minutes 3 seconds
Memory usage 3.37 GB
Texturing parameters
Mapping mode Generic
Blending mode Mosaic
Texture size 4,096
Enable hole filling Yes
Enable ghosting filter Yes
UV mapping time 3 minutes 54 seconds
UV mapping memory usage 3.34 GB
Blending time 1 minutes 6 seconds
Blending memory usage 5.80 GB
Software version 1.7.3.12473
File size 269.87 MB
Tiled Model
Texture 3 bands, uint8
Depth maps generation parameters
Quality High
Filtering mode Mild
Max neighbors 100
Processing time 11 minutes 6 seconds
Memory usage 6.24 GB
Reconstruction parameters
Source data Dense cloud
Tile size 128
Face count Low
Enable ghosting filter No
Processing time 44 minutes 30 seconds
Memory usage 3.28 GB
Software version 1.7.3.12473
File size 584.18 MB
System
Software name Agisoft Metashape Professional
Software version 1.7.2 build 12040
OS Windows 64 bit
RAM 127.78 GB
CPU Intel(R) Core(TM) i9-10900 CPU @ 2.80GHz
GPU(s) NVIDIA GeForce RTX 2080 SUPER