Faster Processing time Tips Please

Comments

5 comments

  • Avatar
    Erik Kubiňan CR

    Use normal detail reconstruction and adjust the minimal distance between two vertices parameter (the higher the number the less polygons will be created and it should be quicker as well) Try 0.01 for example and move patiently above and above until you are happy with the fast pace and quality. Also, use image downscale parameter to define how many times will be images be downscaled in resolution for reconstruction process to make it even faster. Use reconstruction region wisely to "cut off" the parts you don't need before reconstructing. To get the color information of your point cloud you need to use Coloring process on the final model and then after that you export your dense cloud.

    0
    Comment actions Permalink
  • Avatar
    Robert P Grain

    Hello Erik 

    Thank you very much for the response I am just going to give that a Try. I also have seen the other settings re. Detail Decimation Factor and "Maximum Vertex Count per Part should I change anything in there at all to make the processing quicker ?

    I have just been looking at the "Image DownScale (Currently Set at 4) should I lower this value or make it higher to scale less times or more times to make it work on a more scaled down image. I am sorry if it is a silly question.

    I see so many different settings but I havn't found anywhere that I can really find what most of them do.

    Thank you 

    Rob Grain 

    0
    Comment actions Permalink
  • Avatar
    Erik Kubiňan CR

    Detail decimation factor will lower the quality of the resulting model and speed up the process 
    I would not touch the maximum vertex count per part to the positive side in this particular case only lower if so, but this can be dangerous.
    If your downscale is 4 going above will decrease the quality and going lower will increase of course. I would surely not go lower than 4, but your megapixel count matters. If you have 40mpx camera and you decide to go for 4, you should still have quite good detail. Doing that on a 12 mpx camera could be risky.

    0
    Comment actions Permalink
  • Avatar
    Robert P Grain

    Hello Erik 

     

    thank you very much for the reply. I'm sorry for the delay I have been out on site, I performed a Phantom 4 Pro flight this week and it had 1242 image and all in on the Time including spending around an hour to get the CGP''s selected through the Images it took 7 hours to create everything.

    So unfortunately I couldn't start my next phase until 2 am which is okay every so often but I imagine I'm doing something wrong somewhere.

    It did seem quite a bit quicker when I wasn't using GCP's I'm not sure if this adds to the time. I'm not sure that this is a particularly large model compared to other peoples models is this time of 7 hours about the same as others?

    I have got the Minimal Distance between two Points at 0.002000 I wasn't sure if I should have a larger increment at all.

    The Phantom 4 Pro I'm using for this is a 20 Megapixel so maybe I can try and change the scale a little further

    I am sorry to keep asking I just can't really find many details about all of these settings.

    Just wondering if any of these change the Accuracy down at all?

     

     

     

    any help would be most welcome 

     

    thank you very much 

     

    Rob Grain  

    0
    Comment actions Permalink
  • Avatar
    Erik Kubiňan CR

    As long as the alignment is done well and the mesh does not look blobby or muddy the accuracy should not be changing, you are just decreasing the amount of detail. I cannot compare your speed to anything as there are thousands of factors varying. You can move the value of 0.002000 even further to 0.05 I think. It does need a bit of testing really. I cannot speak in general due to your framing thanks to height you shoot from is different your hardware both on site and in machine is different. I recommend you to start heavy on the settings and then move lower on them so you can get quick tests out and see whether you like what you see.

    0
    Comment actions Permalink

Please sign in to leave a comment.