Crate gemini_watermark_removal 

Remove visible Gemini AI watermarks via reverse alpha blending.

Gemini AI overlays a semi-transparent star/sparkle logo on generated images. This crate reverses the alpha-blending equation to recover the original pixels, using calibrated 48x48 and 96x96 alpha masks embedded in the binary.

Quick Start

use gemini_watermark_removal::{WatermarkEngine, ProcessOptions};

let engine = WatermarkEngine::new().expect("failed to init engine");
let mut img = image::open("photo.jpg").unwrap().to_rgb8();
engine.remove(&mut img, None);
img.save("cleaned.jpg").unwrap();

Detection

Before removal, a three-stage detection algorithm checks whether a watermark is present (spatial NCC, gradient NCC, variance analysis). Images without detected watermarks can be automatically skipped to protect originals.

use gemini_watermark_removal::{WatermarkEngine, ProcessOptions};

let engine = WatermarkEngine::new().expect("failed to init engine");
let img = image::open("photo.jpg").unwrap().to_rgb8();
let opts = ProcessOptions::default();
let result = engine.detect(&img, &opts);
println!("Detected: {}, confidence: {:.0}%", result.detected, result.confidence * 100.0);

Re-exports

pub use error::Error;

pub use error::Result;

Modules

blending

Alpha blending math for watermark removal.

detection

Three-stage watermark detection algorithm.

error

Error types for the gemini-watermark-removal crate.

Structs

ProcessOptions

Options controlling watermark processing behavior.

ProcessResult

Result of processing a single image file.

WatermarkEngine

The watermark engine holding pre-computed alpha maps.

Enums

WatermarkSize

Watermark size classification.

Functions

default_output_path

Generate a default output path from an input path.

is_supported_image

Check if a file has a supported image extension.

save_image

Save an RGB image with format-specific quality settings.