Auto-enhance

POST /api/image-auto-enhance

Auto-enhance a photo: stretch the histogram, normalize contrast, and optionally sharpen. The "I feel lucky" button for quick image cleanup.

Applies a quick tonal correction to a photo: stretches the histogram so the brightest pixel becomes white and the darkest becomes black, then normalises contrast. Useful as a baseline pass on user-uploaded photos that look flat or hazy. Not a replacement for proper editing, but a sensible default when you cannot ask the user to do it themselves.

Inputs

Name	Type	Default	Description
image*	file	—	Input image bytes.
claheClipLimit	number (0.5…10)	2	CLAHE clip limit (higher = stronger contrast).
sharpenStrength	number (0…4)	1	Unsharp mask strength (0 disables).
saturationBoost	number (0.5…2)	1.05	Multiplier on chroma channels (1 = no change).
format	enum (jpeg \| png)	"jpeg"	Output encoding.
quality	number (1…100)	90	JPEG quality.

Response

Modes: binary, json. Cache: yes (24h TTL).