Agisoft Metashape

Agisoft Metashape => General => Topic started by: dyoung on April 18, 2021, 07:45:22 PM

Title: High-resolution photos unnecessary if only using medium quality for processing?
Post by: dyoung on April 18, 2021, 07:45:22 PM
Hello -- in a previous thread, Alexey explained that selecting 'medium quality' during photo alignment and dense cloud generation equates to making the photos lower-resolution, by the following factors:

For matching accuracy the correspondence should be the following:
Highest = 0
High = 1
Medium = 2
Low = 4
Lowest = 8

For depth maps quality:
Ultra = 1
High = 2
Medium = 4
Low = 8
Lowest = 16

Basically, the value defines the downscaling factor by each side applied to original image. The only exception is Highest matching accuracy, where the images are upscaled by two times by each side.

So am am wondering, if I use 'medium quality' for both steps, is there any point in capturing my photos with such high resolution? Is the original-resolution photo used for any purpose in the point cloud workflow? Or could I just capture my photos at a lower resolution (say 1/2 the resolution in x and y dimensions) and then use the 'high quality' setting instead?

Thank you in advance!
Title: Re: High-resolution photos unnecessary if only using medium quality for processing?
Post by: cbnewham on April 18, 2021, 09:51:55 PM
I think you'll find that is the case.

However, there may be factors I'm not aware of.

Title: Re: High-resolution photos unnecessary if only using medium quality for processing?
Post by: Alexey Pasumansky on April 20, 2021, 02:42:06 PM
Hello dyoung,

If you are not interested in texture, tiled model or orthomosaic generation, then you can lower the image acquisition resolution, if you never use High accuracy alignment or Ultra quality depth maps generation.
Title: Re: High-resolution photos unnecessary if only using medium quality for processing?
Post by: dyoung on April 20, 2021, 06:43:09 PM
Great--thank you.