Nano Banana · Adobe 4K

curl "https://yyds.seqnode.com/v1/models" \
  -H "Authorization: Bearer YOUR_API_KEY"

curl "https://yyds.seqnode.com/v1beta/models/gemini-3.1-flash-image-preview:generateContent" \
  -H "x-goog-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  --data-binary '{
    "contents": [{
      "role": "user",
      "parts": [{
        "text": "极简产品插画：一只戴蓝色围巾的白色小狐狸站在浅灰背景中，柔和棚拍光线，画面居中，不要文字"
      }]
    }],
    "generationConfig": {
      "responseModalities": ["IMAGE"],
      "imageConfig": {
        "aspectRatio": "1:1",
        "imageSize": "4K"
      }
    }
  }'

curl "https://yyds.seqnode.com/v1beta/models/gemini-3-pro-image-preview:generateContent" \
  -H "x-goog-api-key: YOUR_API_KEY" \
  -H "Content-Type: application/json" \
  --data-binary '{
    "contents": [{
      "role": "user",
      "parts": [{
        "text": "极简产品插画：一只戴蓝色围巾的白色小狐狸站在浅灰背景中，柔和棚拍光线，画面居中，不要文字"
      }]
    }],
    "generationConfig": {
      "responseModalities": ["IMAGE"],
      "imageConfig": {
        "aspectRatio": "1:1",
        "imageSize": "4K"
      }
    }
  }'

{
  "contents": [{
    "role": "user",
    "parts": [
      {
        "text": "保持参考图主体、姿势和构图，只把围巾改成红色，把背景改成浅蓝色，不要文字"
      },
      {
        "inlineData": {
          "mimeType": "image/jpeg",
          "data": "BASE64_IMAGE_1"
        }
      }
    ]
  }],
  "generationConfig": {
    "responseModalities": ["IMAGE"],
    "imageConfig": {"aspectRatio": "1:1", "imageSize": "4K"}
  }
}

{
  "contents": [{
    "role": "user",
    "parts": [
      {
        "text": "以参考图 1 的人物和构图为主体，只采用参考图 2 的服装与光影；保持面部特征，不要文字"
      },
      {
        "inlineData": {
          "mimeType": "image/png",
          "data": "BASE64_IMAGE_1"
        }
      },
      {
        "inlineData": {
          "mimeType": "image/jpeg",
          "data": "BASE64_IMAGE_2"
        }
      }
    ]
  }],
  "generationConfig": {
    "responseModalities": ["IMAGE"],
    "imageConfig": {"aspectRatio": "16:9", "imageSize": "4K"}
  }
}

$model = "gemini-3.1-flash-image-preview"
$imageBase64 = [Convert]::ToBase64String(
  [IO.File]::ReadAllBytes((Resolve-Path ".\reference.jpg"))
)

$body = @{
  contents = @(@{
    role = "user"
    parts = @(
      @{ text = "保持主体不变，只把围巾改成红色" }
      @{ inlineData = @{ mimeType = "image/jpeg"; data = $imageBase64 } }
    )
  })
  generationConfig = @{
    responseModalities = @("IMAGE")
    imageConfig = @{ aspectRatio = "1:1"; imageSize = "4K" }
  }
} | ConvertTo-Json -Depth 12 -Compress

$request = @{
  Uri = "https://yyds.seqnode.com/v1beta/models/$model`:generateContent"
  Method = "Post"
  Headers = @{ "x-goog-api-key" = $env:YM2API_KEY }
  ContentType = "application/json"
  Body = $body
}
$result = Invoke-RestMethod @request

$imagePart = $result.candidates[0].content.parts |
  Where-Object { $_.inlineData } |
  Select-Object -First 1
$extension = if ($imagePart.inlineData.mimeType -eq "image/jpeg") { ".jpg" } else { ".png" }
[IO.File]::WriteAllBytes(
  (Join-Path $PWD "result$extension"),
  [Convert]::FromBase64String($imagePart.inlineData.data)
)

{
  "candidates": [{
    "content": {
      "parts": [{
        "inlineData": {
          "mimeType": "image/jpeg",
          "data": "/9j/4AAQSkZJRgABAQ..."
        }
      }]
    },
    "finishReason": "STOP"
  }],
  "usageMetadata": {
    "promptTokenCount": 11,
    "candidatesTokenCount": 1096,
    "totalTokenCount": 1107
  }
}