Contrast Bucket Shows a Mismatch - Calibration Bins, Exactly

Use one contrast bucket to show a visible mismatch.

highlighted = computed this step

Keep the high score

The contrast bucket also carries score 3/4.

\text{contrast score}={3\over4}

The contrast labels are 1, 1, 0, 0.

1 + 1 + 0 + 0 = 2

The contrast observed fraction is 2 over 4, which reduces to 1 over 2.

{2\over4}={1\over2}