Threshold (Binarize)

Last updated: January 8, 2026

Threshold (Binarize)

Threshold is a binarization effect that simplifies an image into two tones: black and white. It splits mid-gray areas by a cutoff (threshold): pixels brighter than the threshold become white, and pixels darker become black. This is useful for logo/icon styling, scan-like effects, and high-contrast looks.

---

threshold

Description

Binarizes the image using a threshold value (black & white).

In general:

• A higher threshold tends to classify more pixels as dark (black),

• A lower threshold tends to classify more pixels as bright (white),

but the perceived result can vary depending on the image’s brightness distribution.

Format

?threshold={value}

Supported range

• 0 to 255

Examples

요청	결과
?threshold=180	Binarize to black and white with a threshold of 180.

---

Using with other options

• If you want a cleaner and more predictable black/white split, combine it with grayscale=true.

?grayscale=true&threshold=180

---

• Threshold works much better for logos, text, and line drawings than for photos (portraits/landscapes).

• If you’re not getting the look you want, it’s efficient to tune threshold in steps of about 20–30.