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UNCG-DAISY / Instagrain

A camera for measuring sediment grain sizes with edge ML
MIT License
20 stars 2 forks source link

determine best distance from the bed for camera #7

Closed ebgoldstein closed 3 years ago

ebgoldstein commented 3 years ago

this will be determined via back and forth with the sedinet model

ebgoldstein commented 3 years ago

from @jacobstasiewicz:

I took 3 pictures of a camera calibration board from 3 different distances to calculate pixel per inch. The results are as follows: distance: 4 7/8 has a PPI of 624.38 distance: 3 1/2 in has a PPI of 858.52 distance: 2 1/2 in has a PPI of 1144.69

jacobstasiewicz commented 3 years ago

Ordered tripod to take precise pictures at different elevations and run through SediNet

jacobstasiewicz commented 3 years ago

Took 15 pictures at varying heights from 3 inches to 7 inches above the bed to run through sedinet model

jacobstasiewicz commented 3 years ago

Cropped all pictures to 512 x 512 for sedinet model

jacobstasiewicz commented 3 years ago

did calculations on lens angle to find pixels per mm

jacobstasiewicz commented 3 years ago

found to be 3in