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Messages - jinjamu

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General / Error message "Incompatible keypoints"
« on: April 12, 2021, 06:53:44 PM »
I have been working on a rather large model of some underwater topography.  One of the steps of the process I am following involves adding cameras from a dive to a previous model (which is made up of all previous dives), and to then use a camera based alignment of the previous (accumulated) model to the new model (of the last dive) for the production of a rough model to help me to understand which areas are covered and which need further dives. 
When attempting this with my last data set I get an error "Incompatible keypoints".  The process I am following has worked fine for the first 7 dives so I cannot quite understand why I am encountering this problem now.  Any ideas would be appreciated.
Thanks and regards

Is possible delete the disabled images with the reduce overlap tools without check one by one in case of big dataset?

This is a question I have also

Python and Java API / Re: Script to disable every "nth"camera
« on: May 24, 2019, 05:58:56 PM »
Many thanks James...will certainly try that!!!!  :)

Python and Java API / Script to disable every "nth"camera
« on: May 24, 2019, 05:02:56 PM »
I am working with some large datasets provided to me by somebody else.  On examining the images I realize that the amount of overlap is unnecessarily large,which will of course lead to unnecessarily long processing times.  Maybe there are other ways of tackling, however one way could be to run a script to disable every nth image (n could be maybe between 2 and 4) before running alignment.
I wish I was able to use python but I have not picked it up yet.  I was hoping that somebody can provide a script to do this?
Many thanks!

General / Manuals and installers for previous versions
« on: May 19, 2019, 09:40:30 PM »

Apologies if I am missing something, but are manuals and installers for older versions of Photoscan available for download.  I tend to use different versions for different parts of my workflow, and having ready access to a number of releases and their manuals would be very useful.


General / Bad Allocation error during mesh generation in 1.4.5
« on: April 13, 2019, 03:22:37 PM »

I am having this error coming up when running a mesh generation using the "consistent visibility mesh generation method" in 1.4.5, which I have had good success with in the past.

I am running on a highly specced VM on google cloud - 64 CPUs, 4 x Tesla P100, 256Gb RAM,  This is an expensive setup and it is pretty annoying that after running for around 20 hours I get this message!  Lots of money down the drain!

There was a solution posted here around increasing virtual memory which I have done, however before restarting the process only to have the same problem I was wondering if anyone had any further suggestions?

My model consists of around 2,400 24megapixel photographs.  Does anyone know the recommended memory required for such a size?

Many thanks!

General / Memory requirements for depth map model generation
« on: April 08, 2019, 08:02:01 PM »
Is there any rule of thumb to calculate memory requirements for the new "mesh generation based on depth maps" method?  Maybe based on number of photos, photo size, quality of mesh?

Hi Alexey,

I'm transferring the file via wetransfer due to the size

Best regards

Hi Alexey

All cameras are quite close to one another (in the correct position) when I look at the camera overlay.  I tried to define the markers as well as possible in the photographs, zooming in on each one to check.  No coordinates have been input because given this is an underwater wreck and no coordinate measurement is possible (assuming I understand your question).


A friend has advised me that according to him, this problem was introduced from version 1.4, when the feature to incrementally add photos to a model was added in the software.  Not sure if anyone has any different views on this?

General / Strange behaviour when using manual markers for alignment
« on: March 24, 2019, 04:15:54 PM »

I'm working on quite a large model of an underwater shipwreck.  Because of the depth and limited time we have to shoot, I've had to combine photos from three separate dives into one model, and alignment has proved quite challenging.  The best result so far has come from combining all the photos (some 1.8k 24 or 36 MPixel photos) in one single alignment process (as opposed to working in chunks), but a number of photos did not align.  So I've tried using markers to force alignment between aligned and non-aligned photos, with mixed success. 

The strangest thing however, which I would like to ask about, happened following an alignment process which gave me a decent result but left a few photos out of alignment, when I selected the unaligned photos and did a "right-click...align selected cameras", I just got a "ball of cameras". 

I'm attaching screen grabs showing before and after.

Any ideas?


General / Re: Masking transparent parts of images
« on: March 22, 2019, 08:53:20 PM »
OK that works

Is there any way not to render those "transparent" areas at all? 



General / Re: Masking transparent parts of images
« on: March 22, 2019, 08:25:09 AM »
OK I understand. 

So is it correct to say that when a "transparent texture" is encountered in a photo, which matches a mesh surface, then this is textured as white?  (Please excuse my possibly clumsy use of terminology)



General / Re: Masking transparent parts of images
« on: March 21, 2019, 10:50:44 PM »
Hi Alexey. 

I did as you suggested, however the masked out pieces are ending up as white in the textured model. The masking worked 100%, as I mentioned before, and my hope was that the polygons generated from the masked out areas would simply disappear. 

I generated the PNGs with the transparencies from a program called IMBATCH.  I did the alignment with JPGs and Photoscan had no problem to accept PNGs instead.

Thanks for any advice


General / Re: Masking transparent parts of images
« on: March 21, 2019, 06:11:01 PM »
Thanks Alexey!  That worked perfect and i am now seeing the masks.

Would I then need to rebuild the mesh or can I go straight to the texturing?


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