Incomplete orthomosaic

[OFU_UIB]

Hi,
 I am in the working on a project where I am attempting to create large detailed orthomosaic images of the walls of various structures. Mostly this is working out fine. But in some cases (for larger datasets) the orthographic image generated is incomplete (when viewed inside Photoscan). It looks like the upper part of the image has not been generated.

I receive no error message in the log. I have also kept an eye on the memory usage and it never exceeds 50%.

The dimensions of the images that are not complete are 60942x40312, 0.319mm/pix and 60942X40312, 0.319mm/pix , however I have successfully generated larger images (67566x46150, 0,318mm/pix)

Does anyone have suggestions to what I might be doing wrong?

(Using PhotoScan Pro 1.2.4 2399)

Thanks for the help 

[Alexey Pasumansky]

Hello OFU_UIB,

Can you post the sceeenshot of the Ortho view that demonstrates the problem?

[OFU_UIB]

Hi, is this sufficient?

[Alexey Pasumansky]

Hello OFU_UIB,

If you are using mesh as a surface for the orthomosaic generation, have you checked that the reconstructed mesh model is complete and includes the missing part? Probably automatic bounding box size doesn't include this part by some reason and therefore dense cloud and mesh were not generated for the upper part of the model.

[OFU_UIB]

Hi, I have checked the bounding box and the mesh is also compleat.

[Alexey Pasumansky]

Thank you for additional screenshot.

And were there any error messages in the Console pane? Also is there sufficient disk space on the drive with the project data?

[OFU_UIB]

Hi

I have 1.3T  disc space and could not find any error messages in the console pane. I have attached a copie of hte console

[OFU_UIB]

Hi Alexey

I was wondering if there was a maximum size to the orthomosaic´s PhotoScan is able to build? As i posted above the images have tried to generate would exceed 2.5 gig pixels.
I See that within the PhotoScan project folder the orthomosaic is stored in tiles so I assume that with over 1T of free hdd space and NTFS ,space and file size is not what is causing these half-finished mosaics.
When I set the maximum dimensions of the image to 50000 a complete orthomosaic is generated. At this limited resolution the critical fine detail I need is lost. I hope there is an easy solution to my problem.

My work station has 64GbRAM, and the projects I have problems with have around 450 24mp Jpg images.

The images have been taken at various distances. The part not reconstructed stem from the area where the distance between the structure and camera station was the greatest.

[OFU_UIB]

Hi Alexey

I was wondering if there was a maximum size to the orthomosaic´s PhotoScan is able to build? As i posted above the images have tried to generate would exceed 2.5 gig pixels.
I See that within the PhotoScan project folder the orthomosaic is stored in tiles so I assume that with over 1T of free hdd space and NTFS ,space and file size is not what is causing these half-finished mosaics.
When I set the maximum dimensions of the image to 50000 a complete orthomosaic is generated. At this limited resolution the critical fine detail I need is lost. I hope there is an easy solution to my problem.

My work station has 64GbRAM, and the projects I have problems with have around 450 24mp Jpg images.

The images have been taken at various distances. The part not reconstructed stem from the area where the distance between the structure and camera station was the greatest.

* When I set the maximum dimensions of the Image to 30000

[Alexey Pasumansky]

Hello OFU_UIB,

When orthomosaic is generated PhotoScan saves not only the final orthomosaic (in tiled internal representation in several scales), but also the orthorectified original images that are projected on the surface - such files may require large disk space than the originals, if very oblique shots are used, however, more than 1 TB disk space should be sufficient.

I can suggest the following test: in the Ortho view draw the polygon that covers the hole area of reconstruction (including the missing part), then right-click on the drawn shape and choose Assign Image option. In the Assign Image dialog browse the images one by one and check if every one has orthorectified image (should be displayed in the corresponding area).

[OFU_UIB]

Hi,
I In the Assign Images dialogue box I am able to find all my images. However it appears some of them have only ben partly used (see image). What can I do?

[Alexey Pasumansky]

Hello OFU_UIB,

Looks like the issue is related to the size of the orthorectified images. Due to oblique angles it may be of significantly higher resolution, so PhotoScan crops the image.

So the workaround for this problem will be reducing the orthmosaic generation resolution. So it's not related to the total size of the orthomosaic.

[Alterco]

Hi,

I had the same problem.
The solution worked for me.
Thanks.
AA