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General / Re: Changed pitch and markers error in meters increased
« on: December 08, 2022, 04:00:14 PM »
Here is a screenshot of the problem
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Hi Alexey and Paulo,
Thank you so much for the advice. The problem seems to be solved. However, I have a few questions about the pitch.
But first, this is what I did and the correspondent screenshots and reports.
*I set the pitch at 0. I checked the yaw boxes (except the southeast cameras), and I set yaw at 0 degrees. Attachments: 1_Yaw0_Pitch0_D7_B_frontview, Report_D7_461_B_lat_long_yaw0 (Notice that: the camera location total error is 5.4m)
*I set the pitch at 0. I calculated the yaw using the coordinates (as described by Paulo), range (-1.18 to 1.57 degrees). Attachments: 2_Yaw-calculated_Pitch0_D7_frontview, Report_D7_461_B_lat_long_yaw_exact_pitch0 (Notice that: the camera location total error is 5.4m)
The models have the front view as desired. However, why are we setting the pitch at 0 degrees?. The camera in the ROV does not have a downward-facing set-up as assumed when setting pitch at zero (https://www.agisoft.com/forum/index.php?topic=10515.0). It is because the structure recorded has a steep slope, so the camera has a forward-facing setup. However, the pitch set at 90 degrees does not produce a good result, as observed in the initial post. The pitch at 0 degrees, as you advised, works. However, the side-view of the model is less steep than I would expect. I have tried different "pitches," and a 30 degrees pitch produced a model that seems to fit the best (camera location total error 4.39m). However, this is my empirical view.
Regarding the previous I have the following question:
Would you suggest letting it in 0 or in 30 degrees and why ?.
How pitch works in Metashape? is Metashape very sensitive to a not precise pitch?
Is there a way to calculate it?
(I will attach the report and screenshots of the model setting pitch at 30 degrees in the next message since this platform only allow 4 attachments at the time)
Note: In every case, I had to resize and rotate the region. Metashape always gave me a sideways or upsidedown region. I don't know why.
King regard,
Lia YS