Otsu Binarization
An automatic global thresholding method published by Nobuyuki Otsu in 1979. It picks the single brightness cutoff that best separates foreground from background, giving a clean two-tone image without manual tuning.
Spot it
- 01Hard black-and-white split
- 02Solid flat shapes
- 03Lost midtone detail
Why it happens
Examines the brightness histogram and chooses the threshold that maximizes the variance between the dark and bright pixel classes, equivalent to minimizing variance within them.
Recreate it in Pixio
Image edit prompt“Apply Otsu binarization to this image: convert it to strictly pure black and white with a single global threshold chosen to best separate subject from background. Shapes become solid flat silhouettes with hard edges, midtone detail is lost, and no gray or dithering appears. Keep the original subject and composition recognizable.”
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