[Request] 增加 gemini 和 vertex 中 Imagen（文生图）模型

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🥰 Feature Description

imagen-3 的介绍：https://deepmind.google/technologies/imagen-3/

🧐 Proposed Solution

官方实现：

• https://github.com/google-gemini/cookbook/blob/main/quickstarts/Get_started_imagen.ipynb
• https://ai.google.dev/gemini-api/docs/imagen#generate-images

代码参考：

from google import genai
from google.genai import types
from PIL import Image
from io import BytesIO
import base64
from datetime import datetime
from IPython.display import display, Image as IPImage

client = genai.Client(api_key=api_key)

MODEL_ID = "imagen-3.0-generate-002"
prompt = "A cat lounging lazily on a sunny windowstill playing with a kid toy." # @param {type:"string"}
number_of_images = 4 # @param {type:"slider", min:1, max:4, step:1}
person_generation = "ALLOW_ADULT" # @param ['DONT_ALLOW', 'ALLOW_ADULT']
aspect_ratio = "1:1" # @param ["1:1", "3:4", "4:3", "16:9", "9:16"]

response = client.models.generate_images(
    model=MODEL_ID,
    prompt=prompt,
    config=dict(
        number_of_images=number_of_images,
        output_mime_type="image/jpeg",
        person_generation=person_generation,
        aspect_ratio=aspect_ratio
    )
)

# Save and display each generated image
for i, generated_image in enumerate(response.generated_images):
    # Decode the Base64-encoded image data
    image_data = base64.b64decode(generated_image.image.image_bytes)
    
    # Generate a timestamp
    timestamp = datetime.now().strftime("%Y%m%d_%H%M%S")  # Format: YYYYMMDD_HHMMSS
    
    # Create a filename with timestamp
    filename = f"generated_image_{timestamp}_{i + 1}.jpg"
    
    # Save the image to a file
    with open(filename, "wb") as f:
        f.write(image_data)
    
    print(f"Saved: {filename}")
    
    # Display the image in Jupyter Notebook
    display(IPImage(image_data))

📝 Additional Information

No response