Calculating how much light gets through steel mesh (commonly used to make cages)

Crop the ruler and binarize:

enter image description here

Then count the white pixels and divide by the sum of white and black to find:

$0.592548$

In Mathematica:

pixels = Flatten[
   ImageData[
     Binarize[
      ImageTake[mesh, {140, 664}, {1, 892}]]]];
N@Count[pixels, 1]/(Count[pixels, 0] + Count[pixels, 1])

$0.592548$

People wanted a different threshold:

enter image description here

Tags:

Geometry

Area

Percentages

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