Banana Watermark Remove Skill

Remove Gemini Nano Banana / Pro visible watermarks from images using reverse alpha blending.

Tool Location

The GeminiWatermarkTool executables are bundled within this skill at tools/:

• Windows: tools/GeminiWatermarkTool.exe
• macOS: tools/GeminiWatermarkTool-macOS
• Linux: tools/GeminiWatermarkTool-Linux

All binaries are standalone with zero dependencies.

Workflow

1. Determine the operating system and select the correct executable:

   • Windows → GeminiWatermarkTool.exe
   • macOS → GeminiWatermarkTool-macOS
   • Linux → GeminiWatermarkTool-Linux

2. Execute the command based on input type:

   • Single file: GeminiWatermarkTool -i watermarked.jpg -o clean.jpg
   • Directory (batch): GeminiWatermarkTool -i ./input_folder/ -o ./output_folder/

3. Verify output

Usage Examples

# Windows - Single file
.\GeminiWatermarkTool.exe -i watermarked.jpg -o clean.jpg

# Windows - Directory batch
.\GeminiWatermarkTool.exe -i ./input_folder/ -o ./output_folder/

# macOS - Single file
./GeminiWatermarkTool-macOS -i watermarked.jpg -o clean.jpg

# macOS - Directory batch
./GeminiWatermarkTool-macOS -i ./input_folder/ -o ./output_folder/

# Linux - Single file
./GeminiWatermarkTool-Linux -i watermarked.jpg -o clean.jpg

# Linux - Directory batch
./GeminiWatermarkTool-Linux -i ./input_folder/ -o ./output_folder/

Command Line Options

Option	Short	Description
--input <path>	-i	Input file or directory
--output <path>	-o	Output file or directory
--verbose	-v	Enable verbose output
--quiet	-q	Suppress output
--version	-V	Show version
--help	-h	Show help

Supported formats: .jpg, .jpeg, .png, .webp, .bmp

Limitations

• Visible watermarks only: Does NOT remove SynthID (invisible watermarks)
• Gemini watermarks only: Designed specifically for Gemini Nano Banana / Pro watermarks
• Auto-detects 48×48 or 96×96 watermark size based on image dimensions