To generate background images using Vertex AI while applying masking techniques, use Google's image generation models with an image mask to exclude or include specific areas.
Here is the code snippet you can refer to:

In the above code we are using the following points:
- Vertex AI Image Generation: Uses aiplatform.ImageGenerationModel.predict for AI-driven image synthesis.
- Masking with PIL (Python Imaging Library): Creates a binary mask to define included and excluded regions.
- Customizable Mask Regions: Uses rectangle coordinates to selectively control where image elements appear.
- Efficient Image Handling: Converts masks to bytes for API compatibility.
Hence, Vertex AI's image generation model with masking allows precise control over included and excluded areas, enabling advanced background image creation and editing.