多图融合片生成 gemini-3-pro-image-preview 控制宽高比 +清晰度

curl --location --request POST 'https://api.shuyanai.com/v1/chat/completions' \
--header 'Authorization: {{Authorization}}' \
--header 'Content-Type: application/json' \
--data-raw '{
    "model": "gemini-3-pro-image-preview",
    "stream": false,
    "messages": [
        {
            "role": "user",
            "content": [
                {
                    "text": "将两张图进行融合，生成比例为 16:9,分辨率为 2k 的图片",
                    "type": "text"
                },
                {
                    "image_url": {
                        "url": "https://gips3.baidu.com/it/u=1022347589,1106887837&fm=3028&app=3028&f=JPEG&fmt=auto?w=960&h=1280"
                    },
                    "type": "image_url"
                },
                {
                    "image_url": {
                        "url": "https://gips3.baidu.com/it/u=1821127123,1149655687&fm=3028&app=3028&f=JPEG&fmt=auto?w=720&h=1280"
                    },
                    "type": "image_url"
                }
            ]
        }
    ]
}'