Use when the user wants to automatically correct the white balance of an image (or batch) — neutralise colour casts from indoor lighting, mixed light, underwater shots, scans, or uncalibrated cameras. Implements gray-world (default), white-patch (per-channel auto-level), and a combined mode via ImageMagick. Operates on JPEG/PNG/TIFF/WebP; for RAW use `darktable-cli` instead.
