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Author Topic: Alignment incomplete - Hardware limitations?  (Read 1470 times)

lemey789

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Alignment incomplete - Hardware limitations?
« on: January 03, 2020, 11:43:30 AM »
Dear Forum,

I had a persistent issue with aligning large sets of cameras in Agisoft Metashape 1.5.5.
So several hours in the Align Photos step, during Matching Points procedure, the progress stagnates for way over 24 hours after the estimated processing time has past.

This occurs processing singular Chunks with 1700 cameras and more as well as during the alignment of several smaller Chunks, tested on seven Chunks with 400 cameras each (the alignment within the chunks here works fine).

To start with, I would like to know whether this is simply a hardware limitation and if my planned project of processing 1500 - 2500 cameras of a high complexity surface at medium/high quality is at all possible. On the other hand, if there are tweaks or tips to improve output even on a weaker machine?

(LOG is attached)

A productive new year!

System   ################################################
Systemtyp   x64-basierter PC
System-SKU   LENOVO_MT_20N9_BU_SMB_FM_ThinkPad E490
Prozessor   Intel(R) Core(TM) i5-8265U CPU @ 1.60GHz, 1801 MHz, 4 Kern(e), 8 logische(r) Prozessor(en)
Installierter physischer Speicher (RAM)   32,0 GB
Gesamter physischer Speicher   31,8 GB
Verfügbarer physischer Speicher   24,2 GB
Gesamter virtueller Speicher   39,6 GB
Verfügbarer virtueller Speicher   31,6 GB
Größe der Auslagerungsdatei   7,80 GB
Name   Intel(R) UHD Graphics 620
Adaptertyp   Intel(R) UHD Graphics Family, Intel Corporation-kompatibel
Adapterbeschreibung   Intel(R) UHD Graphics 620
Adapter-RAM   1,00 GB (1.073.741.824 Bytes)

Example   ##########################################
CAMERA   NIKOND7500
IMAGES   3509
IMAGE SIZE ~22MB
CHUNKS   4
ALL SIZE 81,0 GB
FORMAT   JPG
FL   18mm
EXIF   Available
Metashape Batch Processing
ALIGN   Accuracy = High;Generic preselection; KPL = 40.000; TPL = 4.000; Adaptive camera model fitting = 1
TIME:ALIGN   24+hrs
Freezes at 59% Matching points; 0/4 processed 0 failed

WidmerEng

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Re: Alignment incomplete - Hardware limitations?
« Reply #1 on: January 03, 2020, 06:48:17 PM »
Is that GPU able to be used within the options? Without a GPU and such a slower CPU, I can see lots of time sitting waiting.  The extra RAM is nice but without a GPU helping out, that slow CPU can't make up the difference.

Even on my (near) top-of-the-line gaming PC, most of the steps are measured in hours with even a few hundred pictures.

Alexey Pasumansky

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Re: Alignment incomplete - Hardware limitations?
« Reply #2 on: January 03, 2020, 10:41:26 PM »
Hello lemey789,

Looks like the problem is related to the utilization of the integrated Intel UHD card.

Try to update the drivers from the Intel web-site directly, if it doesn't help, just disable integrated card in GPU preferences dialog.
Best regards,
Alexey Pasumansky,
Agisoft LLC

lemey789

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Re: Alignment incomplete - Hardware limitations?
« Reply #3 on: January 28, 2020, 05:11:03 PM »
Thank you both for your considerations.

The integrated graphics unit shows up in the Preferences settings.

So far I was able to make progress by disabling the "Use CPU when performing GPU accelerated processing" option, providing that at least one discrete GPU is utilized for processing - as recommended in the Metashape Manual for Version 1.5.

« Last Edit: January 28, 2020, 05:12:49 PM by lemey789 »