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16

General / geo-refrenced orthomosaic photos exported with wrong coordinates

« on: September 18, 2020, 10:00:06 PM »

Hi all,

I have a model of excavation site that is referenced with markers, of which the xyz values are given to match point on site. I have generated an ortho photo for the "top" view, choosing "geographic" projection option. exported as Tiff with World file. I imported the photo into Autocad Map 3d, and it fill right into place matching the surveyed location. setting in xy correct location i mean. with z being 0.

now, the problem occurs because I need ortho photos for elevations and sections of the same model.
what I did is, as an example:
I set the view to predefined "front" view, then process generating orthomosaic, I choose "planer" projection (because geographic is greyed out) and from te drop down menu I choose "Top", I keep other options to their default, I now have the image exported as Tiff with world file.
since it is an elevation (facade) view then the photo actually shows what the model looks like in alignment to xz axes.

when I import this into autocad Map 3d, it falls in the wrong location. and in the wrong rotation. so, it imports it in the xy plane, but still insert it in different location than my survey and of course it should be tilted 90 degrees into the xz plane.

How can I export such views with their right coordinates so that it is imported within the right coordinated too??
is that possible? if not, then what strategy can I follow to make use of these image in the way I need ? of course I can always change the view in autocad to be "front", change UCS to match it, import the image, and manually move it into the right place. but I believe there must be a smarter way to do this since Metashape already offers the tool of exporting geo-refrenced ortho images. in the mean time I am only able to make use of ortho images in the "top" view.

all advises are appreciated.

many thanks!

17

General / orthomosaic fail, no identifiable error

« on: September 18, 2020, 05:11:46 PM »

Hi all,

I want to generate an orthomosaic photo, the process goes about 20% then suddenly end with no error or success message, the ortho tab is there but totally empty, also I export the ortho photo, it is just a blank space (expected but wanted to experiment it)

there is already a topic in the forum with same issue, the advice there doesn't seem to help me in this situation. (link https://www.agisoft.com/forum/index.php?topic=7324.0)

any ideas or suggestion that might help?

below are more details:
chunk is merged of 4 chuck, all cameras are there with the right path, textured model of the merged chuck also looks very good, area is also iside the bounding box frame. I tried using smaller area of the model but also had the same issue.


looking forward to hearing from you all!
thanks.

18

General / good photos, good dense cloud, BAD TEXTURE

« on: September 03, 2020, 03:00:06 PM »

Dear all,

I am facing the weirdest problem and I am all out of ideas so I really wish someone could help.

Photogrammetry documentation is an essential part of my work, and having a good textured model is one of the desired outcomes that I seek.
just recently I had been having a very poor textured model for every project. it is weird because I am still using the same equipment (camera, ..etc) and using same processing settings in Metashape as I used to do before.
before I used to have an almost photo-realistic textured model outcome but now all of a sudden every project I process is turning out very blurry mushy like texture. funny enough the dense cloud and shaded model looks better than the textured one!

I have tried updating , uninstalling, and reinstalling the software but with no luck.

Can some one please help, any ideas are appreciated. I had been looking for a solution for quiet some time now and I really need one because it affects my work.

thanks!

attached are some explanatory images.  you can clearly see the result I used to have previously (image C)