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Size: 3125
Comment:
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Size: 3105
Comment:
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| Deletions are marked like this. | Additions are marked like this. |
| Line 96: | Line 96: |
| == Discussion == |
Spacecraft Azimuth Variations
Aim and Objectives
Purpose of Test 11: To evaluate SPC's ability to represent a simplified 'boulder' which has a constant 20 degree slope.
Objective for Tests 11 F, G, H, I & J, Spacecraft Azimuth Variations
- To investigate the effect of varying the combination of spacecraft azimuths with respect to a landmark contained in the image suite;
- To investigate the effect of the number of images and viewing conditions.
Methodology
The 'boulder' was simulated by generating a simple axi-symmetric, flat-topped cone (peak) with a constant 20 degree slope. Multiple peaks and (simplified) craters are randomly placed in an otherwise flat landscape of width approx. 22.5m.
Entire Truth map: REGION.MAP
Bigmaps
The following TAG1 bigmaps were tiled/iterated and evaluated:
Starting topography defined from: START1.MAP at pixel/line location 49, 49 (= REGION.MAP at p/l 1125, 1125).
Step |
GSD |
Overlap Ratio |
Q Size |
Width |
Center |
START.MAP |
20cm |
- |
49 |
20m |
REGION.MAP p/l 1125, 1125 (center) |
10cm-Tiling |
10cm |
1.3 |
130 |
20m |
START1.MAP, p/l 49, 49 |
5cm-Tiling |
5cm |
1.3 |
250 |
20m |
START1.MAP, p/l 49, 49 |
5cm-Iterations |
5cm |
- |
- |
20m |
START1.MAP, p/l 49, 49 |
Portion Truth Map (011TRU.MAP) |
1cm |
- |
200 |
4m |
REGION.MAP, p/l 996, 1005 |
Tiling/Iteration Parameters
Auto-Elimination Parameters: |
0, 60, .25, .25, 0, 3 |
Reset albedo/slopes |
NO |
Determine Central Vector |
YES |
Differential Stereo |
YES |
Shadows |
YES |
Tiling seed files: t11-10.seed , t11-05.seed
Iteration seed file : Piteate2StSh-woAYY
Data
- Data was generated by Eric.
- Image resolutions: 2cm/pixel.
Viewing Conditions
Name |
Sun |
S/C Az |
S/C Zenith |
Total Number of Images |
Test11F |
45, 0, -45 |
every 20 |
45 |
72 |
Test11G |
45, 0, -45 |
every 30 |
45 |
48 |
Test11H |
45, 0, -45 |
every 45 |
45 |
32 |
Test11I |
45, 0, -45 |
every 60 |
45 |
24 |
Test11J |
45, 0, -45 |
every 90 |
45 |
16 |
Test 11F Viewing Conditions
Test 11G Viewing Conditions
Test 11H Viewing Conditions
Test 11I Viewing Conditions
Test 11J Viewing Conditions
Results ( All with overlaps)
Test Over11FGHIJ Comparative Results