Axes Orientation

[jwmm2]

Hi all

Looking for help orientating underwater models.

We are making large scale models of the seabed using ROVs with a stereo-pair of GoPros to capture video.

At the moment we are working on underwater cliffs and are really interested in how the slope/gradient of the cliffs affects the the life that lives on it. But to start we need to orientate our model correctly and this is where we are having problems. We know that the pitch of the ROV doesn't change during the survey (it's effectively level) and had hoped to use this to orientate our model, but so far we are not having any success. Does anybody have any advice on this?

Any advice on how to measure slope angle would also be welcome. At the moment we are using surface normals, but would be interested in if there is any easier way.

Many thanks

Joe 

[Paulo]

Hello joe,

if you have a small representative data set you can share, I would certainly have a look at it and give my advice.

[jwmm2]

Hi Paul

That would be very helpful, thanks. What's the best way to share the data with you?

Cheers
Joe

[Paulo]

Thru Google drive, Drive sharing or any other web sharing data service...

[2tall3ne]

Any feedback on this? I have the same situation with my scaled dataset, Z is never up and I have pitch, roll and heading values for each image, I do not have x,y,z.

[Alexey Pasumansky]

Hello Joe,

You can use the following approach:
- select all cameras in the Reference pane, right-click on selection and use Modify option to set Pitch value for all cameras to the known value,
- select all cameras in the Reference pane, right-click on selection and use Modify option to set Accuracy (degrees) option to 360/1/180 value (accuracy for yaw, pitch and roll angles),
- select all cameras in the Reference pane and enable the checkboxes in front of Yaw column and disable checkboxes, if any for all cameras in front of Label column,
- press Update button on the Reference pane toolbar.


2tall3ne,
you can try to use the similar approach, but load yaw, pitch, roll with the respective accuracy to the Reference pane.

[2tall3ne]

I will try this and report back.

Thank you Alexey.

[2tall3ne]

It worked beautifully, thank you so much for this. I have been banging my head against the wall for over a week.