Need help measuring irregular cardboard cutouts accurately

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Hello everybody, I'm engaged on a primary yr college challenge the place I must measure and digitize irregular, curved cardboard items that had been reduce by hand. These items are a part of bodily architectural fashions, and I need to seize their form and dimensions as exactly as doable in 2D to later replicate them digitally (in CAD or comparable).

Right here's what I’ve thus far:

I've taken high-resolution top-down pictures of every piece, subsequent to a identified scale reference (a ruler). The photographs will not be completely orthogonal, however I’m planning to make use of perspective correction (homography) if wanted. I need to extract the define and get correct size measurements of the curves or sides.

My questions:

Is utilizing i2pdf a very good methodology for this type of 2D form measurement and calibration? Are there higher or simpler alternate options for precisely measuring bodily cutouts from photos? Any recommendations on greatest practices when photographing these sorts of objects to attenuate distortion or errors?

Any assist or assets could be significantly appreciated! Thanks upfront.