Gemini Imagen API - Image Generation

The Imagen API on Vertex AI generates high-quality images from text prompts. ShopMax India uses it to create product mockup images for new listings before physical photography is available, and to generate marketing banners for seasonal sales events.

Imagen is accessed through the Vertex AI SDK. You send a text prompt and receive base64-encoded PNG images. You control the number of images, aspect ratio, and safety filtering level. The model supports styles like photorealistic, illustration, and studio product photography.

The below example shows how ShopMax India generates product mockup images and sale banners using the Imagen API.

It gives the following output,

Saved: sony_headphones_1.png (1024x1024)
Saved: sony_headphones_2.png (1024x1024)

For marketing banners, use a 16:9 aspect ratio and include brand context in the prompt. ShopMax India generates Diwali sale banners with a single prompt specifying the discount, product category, and festive visual style.

It gives the following output,

Banner generated: 1920 x 1080
Generated: Samsung Galaxy S24
Generated: Apple MacBook Air
Generated: Boat Rockerz 450

Imagen generation costs approximately $0.02 per image. For ShopMax India, batch generate during off-peak hours and cache generated images in Cloud Storage with a CDN in front. Use image hashing to avoid regenerating identical prompts.