How do i run only a subset of the photos?

Hi

I have several thousand UAV photos unsorted in folders. Is there a way to run the ortophoto process on only part of the data ? Perhapse by defining a polygon in a shapefile of the area or another way ?

Best regards
Erik Eggum

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Just put the subset you want to use in a directory and select them for the task. Make sure your images have enough overlap, and that the images are sharp, for best results.

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Yes - but they are unsorted and of big forrested similar areas.I need like 2000 pictures of a total of 12000. Hard to sort manual. Is there a tool to pick out a area of interest from the EXIF GPS data, and copy those pictures to a folder ?

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I imagine they were taken in blocks rather than randomly spaced? Can you use the image time of saving to get a contiguous area to process?

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Yes - that i can do. Then I understand there is no automatic way to do it, so I will do it manually :slight_smile:

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you could import them into QGIS “import geotagged photos”, they will be sorted by their lat lon. then choose the block of images you want from there.

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Yes- thankyou - I will try that.

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I have a not-ready-for-prime-time Python code that downselects a universe of images using the fraction of the ground object area covered that overlaps a boundary / bounded region of interest and then copies that subset of images to a directory. If that is of interest let me know.

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Hi Neo2021,

I would be interested in trying out your alfa state software. I have multi flight missions with overlap where I would like to isolate images in areas where the final product is less than ideal.
I have been doing this in a convoluted multi step process using excel and QGIS.

Cheers,

Jeff

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