Forum

Author Topic: Pixel size when using downsampled images - original or 2x?  (Read 779 times)

jenkinsm

  • Jr. Member
  • **
  • Posts: 72
    • View Profile
Pixel size when using downsampled images - original or 2x?
« on: January 12, 2023, 03:03:04 AM »
I'm testing out a workflow where I capture source data using 8.3K raw video (~35 MP - 8256 x 4644) but then reduce it to 4128 x 2322 for the photos that will go into Metashape. My projects use tens of thousands of images so reducing the file size by 3/4 will be a huge benefit both for storage and processing speed.

I am wondering whether I should use the original pixel size in the Camera Calibration dialog, or if I should double the pixel size in order to "match" the images that are going into Metashape.

Is there a correct answer to this? Does it even matter, since it's just used for the initial estimate?

Thanks in advance!

jenkinsm

  • Jr. Member
  • **
  • Posts: 72
    • View Profile
Re: Pixel size when using downsampled images - original or 2x?
« Reply #1 on: January 12, 2023, 02:48:51 PM »
I might have figured it out - I used the original pixel size with the downsampled image, and the mesh turned out roughly 2x larger than it should have. So I should probably double the pixel size if I downsample 2x.