Images

Image generation (Gemini and Imagen)

This example demonstrates generating images using both Gemini 2.0 Flash and Imagen 3 models, focusing on cat-related prompts.

Import necessary libraries. Make sure Pillow is installed!

from google import genai
from google.genai import types
from PIL import Image
from io import BytesIO

Initialize the Gemini client with your API key

client = genai.Client(api_key="YOUR_API_KEY")

We start by using Gemini 2.0 Flash for image generation. Demonstrates generating an image and associated text using Gemini 2.0 Flash.

contents = (
    "Hi, can you create a 3D rendered image of a cat wearing a wizard hat, "
    "casting a spell in a magical forest?"
)

response = client.models.generate_content(
    model="gemini-2.0-flash-exp-image-generation",
    contents=contents,
    config=types.GenerateContentConfig(response_modalities=["Text", "Image"]),
)

Save the image to a file and display it

for part in response.candidates[0].content.parts:
    if part.text is not None:
        print(part.text)
    elif part.inline_data is not None:
        image = Image.open(BytesIO(part.inline_data.data))
        image.save("gemini-cat-wizard.png")
        image.show()

Now we use Imagen 3 for image generation. Demonstrates generating multiple high-quality images of cats using Imagen 3. Imagen 3 is only available on the Paid Tier and always includes a SynthID watermark.

response = client.models.generate_images(
    model="imagen-3.0-generate-002",
    prompt="A photorealistic image of a cat astronaut floating in space",
    config=types.GenerateImagesConfig(number_of_images=2),
)

Save the images to files and display them

for i, generated_image in enumerate(response.generated_images):
    image = Image.open(BytesIO(generated_image.image.image_bytes))
    image.save(f"imagen-cat-astronaut-{i+1}.png")
    image.show()

Running the Example

First, install the Google Generative AI library

$ pip install google-genai Pillow

Then run the program with Python

$ python image-generation.py
# Expected output (will vary based on the model):
# (Text describing the cat wizard image from Gemini 2.0 Flash)
# (Two image windows will open, displaying the generated cat astronaut images from Imagen 3)
# Image saved as gemini-cat-wizard.png
# (Two image windows will open, displaying the generated cat astronaut images from Imagen 3)

An illustration or output
from the example code

Further Information

Gemini docs link 1