Science, and have handled Glasses, will more readily apprehend what
followeth.

FOOTNOTES:

[A] In our Author's _Lectiones Opticæ_, Part I. Sect. IV. Prop 29, 30,
there is an elegant Method of determining these _Foci_; not only in
spherical Surfaces, but likewise in any other curved Figure whatever:
And in Prop. 32, 33, the same thing is done for any Ray lying out of the
Axis.

[B] _Ibid._ Prop. 34.

    would update input_min to be 128.0 / 12.7 = -10.07874
*   if the output is unsigned, input_min is forced to be 0, and only the
    specified input_max is used.

After determining the scale_factor and updating the input range, it applies the
following to each value in the 'input' tensor.

output = round(clamp(value, input_min, input_max) * scale_factor) / scale_factor.