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Improved readability #40

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The updated implementation uses the @ operator for matrix multiplication, uses the illuminant_D65 constant from the colour library for the reference white point, and includes a more detailed function signature.

The updated implementation uses the @ operator for matrix multiplication, uses the `illuminant_D65` constant from the `colour` library for the reference white point, and includes a more detailed function signature.
@andreped andreped self-requested a review April 4, 2023 12:54
_rgb2xyz = np.array([[0.412453, 0.357580, 0.180423],
[0.212671, 0.715160, 0.072169],
[0.019334, 0.119193, 0.950227]])
from colour.models import illuminants
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For this project, we wish to use pure numpy, torch, or tensorflow without introducing any new libraries. Hence, using the colour library is not ideal.


# scale by CIE XYZ tristimulus values of the reference white point
arr = xyz.copy()
arr = arr / np.asarray((0.95047, 1., 1.08883), dtype=xyz.dtype)
xyz = xyz / illuminants.illuminant_D65()[np.newaxis, :]
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Due to the beforementioned comment, I would keep the old solution for this transform.

The old copy() can still likely be removed, and the variable renaming is fine.

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