# gemini-image-watermark-remove

> Remove watermarks from Gemini-generated images

- Author: be:theproud
- Repository: lazylagom/imlazy-skills
- Version: 20260121172628
- Stars: 0
- Forks: 0
- Last Updated: 2026-02-06
- Source: https://github.com/lazylagom/imlazy-skills
- Web: https://mule.run/skillshub/@@lazylagom/imlazy-skills~gemini-image-watermark-remove:20260121172628

---

---
name: gemini-image-watermark-remove
description: Remove watermarks from Gemini-generated images
---

# Gemini Watermark Remover

Remove the SynthID watermark from images generated by Google Gemini AI.

**Credit**: This skill is based on [GeminiWatermarkRemoveSkill](https://github.com/kevintsai1202/GeminiWatermarkRemoveSkill) by Kevin Tsai.

## Quick Start

```bash
npx gemini-image-watermark-remove image.png
```

## Usage

```bash
# Basic usage
npx gemini-image-watermark-remove image.png

# Custom output path
npx gemini-image-watermark-remove image.png -o clean.png

# Force large mask mode
npx gemini-image-watermark-remove image.png -m large

# Adjust alpha gain (for stronger removal)
npx gemini-image-watermark-remove image.png -g 1.5
```

## Options

| Option | Description | Default |
|--------|-------------|---------|
| `-o, --output` | Output file path | `<name>_clean.<ext>` |
| `-m, --mode` | Mask mode: auto, small, large | `auto` |
| `-g, --gain` | Alpha gain value (1.0-3.0) | `1.0` |

## How It Works

Uses reverse alpha blending algorithm:

```
original_pixel = (current_pixel - α × watermark_color) / (1 - α)
```

Mask size is auto-detected based on image dimensions:
- Images ≤1024px: 48×48 mask, 32px margin
- Images >1024px: 96×96 mask, 64px margin