Alibaba Cloud Model Studio:Wan2.7 - image generation and editing

import os
import base64
import mimetypes
import urllib.request
import dashscope
from dashscope.aigc.image_generation import ImageGeneration
from dashscope.api_entities.dashscope_response import Message

# The following base_url is for the Singapore region. Replace {WorkspaceId} with your Bailian workspace ID. The base_url varies by region.
dashscope.base_http_api_url = "https://{WorkspaceId}.ap-southeast-1.maas.aliyuncs.com/api/v1"

# If you have not configured environment variables, replace the following line with your Model Studio API key: api_key="sk-xxx"
# The API key varies by region. To obtain an API key, visit: https://www.alibabacloud.com/help/en/model-studio/get-api-key
api_key = os.getenv("DASHSCOPE_API_KEY")

# --- Base64 encoding function ---
# The Base64 encoding format is data:{MIME_type};base64,{base64_data}
def encode_file(file_path):
    mime_type, _ = mimetypes.guess_type(file_path)
    if not mime_type or not mime_type.startswith("image/"):
        raise ValueError("Unsupported or unrecognized image format")
    with open(file_path, "rb") as image_file:
        encoded_string = base64.b64encode(image_file.read()).decode("utf-8")
    return f"data:{mime_type};base64,{encoded_string}"

"""
Image input methods:
The following are three methods for image input. You need to choose only one.
1. Use a public URL: This method is suitable for publicly accessible images.
2. Use a local file: This method is suitable for local development and testing.
3. Use Base64 encoding: This method is suitable for private images or scenarios that require encrypted transmission.
"""
# [Method 1] Use a public image URL
image_1 = "https://help-static-aliyun-doc.aliyuncs.com/file-manage-files/zh-CN/20251229/pjeqdf/car.webp"
image_2 = "https://help-static-aliyun-doc.aliyuncs.com/file-manage-files/zh-CN/20251229/xsunlm/paint.webp"

# [Method 2] Use a local file (supports absolute and relative paths)
# image_1 = "file:///path/to/your/car.png"
# image_2 = "file:///path/to/your/paint.png"

# [Method 3] Use a Base64-encoded image
# image_1 = encode_file("/path/to/your/car.png")
# image_2 = encode_file("/path/to/your/paint.png")

message = Message(
    role="user",
    content=[
        {"text": "Spray the graffiti from image 2 onto the car in image 1"},
        {"image": image_1},
        {"image": image_2},
    ],
)
print("----sync call, please wait a moment----")
rsp = ImageGeneration.call(
    model="wan2.7-image-pro",
    api_key=api_key,
    messages=[message],
    watermark=False,
    n=1,
    size="2K",  # wan2.7-image-pro supports 4K resolution only for text-to-image generation. Image editing and multi-image generation support up to 2K resolution.
)

# Extract the result image URL and save the image to a local file.
if rsp.status_code == 200:
    for i, choice in enumerate(rsp.output.choices):
        for j, content in enumerate(choice["message"]["content"]):
            if content.get("type") == "image":
                image_url = content["image"]
                file_name = f"output_{i}_{j}.png"
                # The result URL is valid for 24 hours. Please download it promptly.
                urllib.request.urlretrieve(image_url, file_name)
                print(f"Image saved to {file_name}")
else:
    print(f"Failed: status_code={rsp.status_code}, message={rsp.message}")

{
    "status_code": 200,
    "request_id": "81d868c6-6ce1-92d8-a90d-d2ee71xxxxxx",
    "code": "",
    "message": "",
    "output": {
        "text": null,
        "finish_reason": null,
        "choices": [
            {
                "finish_reason": "stop",
                "message": {
                    "role": "assistant",
                    "content": [
                        {
                            "image": "https://dashscope-result-bj.oss-cn-beijing.aliyuncs.com/xxxxxx.png?Expires=xxxxxx",
                            "type": "image"
                        }
                    ]
                }
            }
        ],
        "audio": null,
        "finished": true
    },
    "usage": {
        "input_tokens": 18790,
        "output_tokens": 2,
        "characters": 0,
        "image_count": 1,
        "size": "2985*1405",
        "total_tokens": 18792
    }
}

import os
import base64
import mimetypes
import urllib.request
import dashscope
from dashscope.aigc.image_generation import ImageGeneration
from dashscope.api_entities.dashscope_response import Message
from http import HTTPStatus

# The following base_url is for the Singapore region. Replace {WorkspaceId} with your Bailian workspace ID. The base_url varies by region.
dashscope.base_http_api_url = "https://{WorkspaceId}.ap-southeast-1.maas.aliyuncs.com/api/v1"

# If you have not configured environment variables, replace the following line with your Model Studio API key: api_key="sk-xxx"
# The API key varies by region. To obtain an API key, visit https://www.alibabacloud.com/help/en/model-studio/get-api-key
api_key = os.getenv("DASHSCOPE_API_KEY")

# --- Base64 encoding function ---
# The Base64 encoding format is data:{MIME_type};base64,{base64_data}
def encode_file(file_path):
    mime_type, _ = mimetypes.guess_type(file_path)
    if not mime_type or not mime_type.startswith("image/"):
        raise ValueError("Unsupported or unrecognized image format.")
    with open(file_path, "rb") as image_file:
        encoded_string = base64.b64encode(image_file.read()).decode("utf-8")
    return f"data:{mime_type};base64,{encoded_string}"

"""
Image input methods:
Three image input methods are provided below. Choose one.
1. Use a public URL - suitable for publicly accessible images.
2. Use a local file - suitable for local development and testing.
3. Use Base64 encoding - suitable for private images or scenarios that require encrypted transmission.
"""
# [Method 1] Use a public image URL
image_1 = "https://help-static-aliyun-doc.aliyuncs.com/file-manage-files/zh-CN/20251229/pjeqdf/car.webp"
image_2 = "https://help-static-aliyun-doc.aliyuncs.com/file-manage-files/zh-CN/20251229/xsunlm/paint.webp"

# [Method 2] Use a local file (supports absolute and relative paths)
# image_1 = "file:///path/to/your/car.png"
# image_2 = "file:///path/to/your/paint.png"

# [Method 3] Use a Base64-encoded image
# image_1 = encode_file("/path/to/your/car.png")
# image_2 = encode_file("/path/to/your/paint.png")

# Create an asynchronous task.
def create_async_task():
    print("Creating async task...")
    message = Message(
        role="user",
        content=[
            {"text": "Spray the graffiti from image 2 onto the car in image 1."},
            {"image": image_1},
            {"image": image_2},
        ],
    )
    response = ImageGeneration.async_call(
        model="wan2.7-image-pro",
        api_key=api_key,
        messages=[message],
        watermark=False,
        n=1,
        size="2K",  # wan2.7-image-pro supports 4K resolution only for text-to-image generation scenarios. Image editing and collage generation support a maximum resolution of 2K.
    )

    if response.status_code == 200:
        print("Task created successfully:", response)
        return response
    else:
        raise Exception(f"Failed to create task: {response.code} - {response.message}")

# Wait for the task to complete.
def wait_for_completion(task_response):
    print("Waiting for task completion...")
    status = ImageGeneration.wait(task=task_response, api_key=api_key)

    if status.output.task_status == "SUCCEEDED":
        print("Task succeeded!")
        # Extract the result image URL and save the image to a local file.
        for i, choice in enumerate(status.output.choices):
            for j, content in enumerate(choice["message"]["content"]):
                if content.get("type") == "image":
                    image_url = content["image"]
                    file_name = f"output_{i}_{j}.png"
                    # The result URL is valid for 24 hours. Download the image in a timely manner.
                    urllib.request.urlretrieve(image_url, file_name)
                    print(f"Image saved to {file_name}")
    else:
        raise Exception(f"Task failed with status: {status.output.task_status}")

# Obtain information about the asynchronous task.
def fetch_task_status(task):
    print("Fetching task status...")
    status = ImageGeneration.fetch(task=task, api_key=api_key)

    if status.status_code == HTTPStatus.OK:
        print("Task status:", status.output.task_status)
        print("Response details:", status)
    else:
        print(f"Failed to fetch status: {status.code} - {status.message}")

# Cancel the asynchronous task.
def cancel_task(task):
    print("Canceling task...")
    response = ImageGeneration.cancel(task=task, api_key=api_key)

    if response.status_code == HTTPStatus.OK:
        print("Task canceled successfully:", response.output.task_status)
    else:
        print(f"Failed to cancel task: {response.code} - {response.message}")

# Main execution flow.
if __name__ == "__main__":
    task = create_async_task()
    wait_for_completion(task)

import com.alibaba.dashscope.aigc.imagegeneration.*;
import com.alibaba.dashscope.exception.ApiException;
import com.alibaba.dashscope.exception.NoApiKeyException;
import com.alibaba.dashscope.exception.UploadFileException;
import com.alibaba.dashscope.utils.Constants;
import com.alibaba.dashscope.utils.JsonUtils;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;
import java.util.Arrays;
import java.util.Base64;
import java.util.Collections;
import java.util.List;
import java.util.Map;

/**
 * wan2.7-image-pro Image Editing - Synchronous Call Example
 */
public class Main {

    static {
        // The following URL is for the Singapore region. Replace {WorkspaceId} with your Bailian workspace ID. The base_url varies by region.
        Constants.baseHttpApiUrl = "https://{WorkspaceId}.ap-southeast-1.maas.aliyuncs.com/api/v1";
    }

    // If you have not configured an environment variable, replace the following line with your Model Studio API key: apiKey="sk-xxx"
    // The API key varies by region. To obtain an API key, visit https://www.alibabacloud.com/help/en/model-studio/get-api-key
    static String apiKey = System.getenv("DASHSCOPE_API_KEY");

    // --- Base64 encoding function ---
    // Base64 encoding format: data:{MIME_type};base64,{base64_data}
    public static String encodeFile(String filePath) throws IOException {
        byte[] fileContent = Files.readAllBytes(Paths.get(filePath));
        String base64String = Base64.getEncoder().encodeToString(fileContent);
        String mimeType = Files.probeContentType(Paths.get(filePath));
        return "data:" + mimeType + ";base64," + base64String;
    }

    public static void basicCall() throws ApiException, NoApiKeyException, UploadFileException, IOException {
        /*
         * Description of image input methods:
         * Three image input methods are provided below. Select one.
         * 1. Use a public URL: Suitable for publicly accessible images.
         * 2. Use a local file: Suitable for local development and testing.
         * 3. Use Base64 encoding: Suitable for private images or scenarios that require encrypted transmission.
         */
        // Method 1: Use a public image URL.
        String image1 = "https://help-static-aliyun-doc.aliyuncs.com/file-manage-files/zh-CN/20251229/pjeqdf/car.webp";
        String image2 = "https://help-static-aliyun-doc.aliyuncs.com/file-manage-files/zh-CN/20251229/xsunlm/paint.webp";

        // Method 2: Use a local file. Both absolute and relative paths are supported.
        // Format: file:// + file path
        // String image1 = "file:///path/to/your/car.png";
        // String image2 = "file:///path/to/your/paint.png";

        // Method 3: Use a Base64-encoded image.
        // String image1 = encodeFile("/path/to/your/car.png");
        // String image2 = encodeFile("/path/to/your/paint.png");

        // Build a multi-image input message.
        ImageGenerationMessage message = ImageGenerationMessage.builder()
                .role("user")
                .content(Arrays.asList(
                        // Multi-image input is supported. You can provide multiple reference images.
                        Collections.singletonMap("text", "Spray the graffiti from image 2 onto the car in image 1"),
                        Collections.singletonMap("image", image1),
                        Collections.singletonMap("image", image2)
                )).build();

        ImageGenerationParam param = ImageGenerationParam.builder()
                .apiKey(apiKey)
                .model("wan2.7-image-pro")
                .messages(Collections.singletonList(message))
                .n(1)
                .size("2K") // For wan2.7-image-pro, only the text-to-image generation scenario supports 4K resolution. Image editing and collage generation support a maximum resolution of 2K.
                .build();

        ImageGeneration imageGeneration = new ImageGeneration();
        ImageGenerationResult result = null;
        try {
            System.out.println("---sync call for image editing, please wait a moment----");
            result = imageGeneration.call(param);
        } catch (ApiException | NoApiKeyException | UploadFileException e) {
            throw new RuntimeException(e.getMessage());
        }
        // Extract the result image URL and save it to a local file.
        for (int i = 0; i < result.getOutput().getChoices().size(); i++) {
            List<Map<String, Object>> contents = result.getOutput().getChoices().get(i)
                    .getMessage().getContent();
            for (int j = 0; j < contents.size(); j++) {
                if ("image".equals(contents.get(j).get("type"))) {
                    String imageUrl = (String) contents.get(j).get("image");
                    String fileName = "output_" + i + "_" + j + ".png";
                    // The result URL is valid for 24 hours. Download the image in a timely manner.
                    try (InputStream in = new URL(imageUrl).openStream()) {
                        Files.copy(in, Paths.get(fileName), StandardCopyOption.REPLACE_EXISTING);
                    }
                    System.out.println("Image saved to " + fileName);
                }
            }
        }
    }

    public static void main(String[] args) throws ApiException, NoApiKeyException, UploadFileException, IOException {
        basicCall();
    }
}

{
    "requestId": "1bf6173a-e8de-9f75-94d3-5e618f875xxx",
    "usage": {
        "input_tokens": 18790,
        "output_tokens": 2,
        "total_tokens": 18792,
        "image_count": 1,
        "size": "2985*1405"
    },
    "output": {
        "choices": [
            {
                "finish_reason": "stop",
                "message": {
                    "role": "assistant",
                    "content": [
                        {
                            "image": "https://dashscope-result-bj.oss-cn-beijing.aliyuncs.com/xxxxxx.png?Expires=xxxxxx",
                            "type": "image"
                        }
                    ]
                }
            }
        ],
        "finished": true
    },
    "status_code": 200,
    "code": "",
    "message": ""
}

import com.alibaba.dashscope.aigc.imagegeneration.*;
import com.alibaba.dashscope.exception.ApiException;
import com.alibaba.dashscope.exception.NoApiKeyException;
import com.alibaba.dashscope.exception.UploadFileException;
import com.alibaba.dashscope.utils.Constants;
import com.alibaba.dashscope.utils.JsonUtils;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;
import java.util.Arrays;
import java.util.Base64;
import java.util.Collections;
import java.util.List;
import java.util.Map;

/**
 * wan2.7-image-pro Image Editing - Asynchronous Invocation Example
 */
public class Main {

    static {
        // The following URL is for the Singapore region. Replace {WorkspaceId} with your Bailian workspace ID. The base_url varies by region.
        Constants.baseHttpApiUrl = "https://{WorkspaceId}.ap-southeast-1.maas.aliyuncs.com/api/v1";
    }

    // If you have not configured an environment variable, replace the following line with your Model Studio API key: apiKey="sk-xxx"
    // The API key varies by region. To obtain an API key, visit: https://www.alibabacloud.com/help/en/model-studio/get-api-key
    static String apiKey = System.getenv("DASHSCOPE_API_KEY");

    // --- Base64 encoding function ---
    // The Base64 encoding format is data:{MIME_type};base64,{base64_data}
    public static String encodeFile(String filePath) throws IOException {
        byte[] fileContent = Files.readAllBytes(Paths.get(filePath));
        String base64String = Base64.getEncoder().encodeToString(fileContent);
        String mimeType = Files.probeContentType(Paths.get(filePath));
        return "data:" + mimeType + ";base64," + base64String;
    }

    public static void asyncCall() throws ApiException, NoApiKeyException, UploadFileException, IOException {
        /*
         * Description of image input methods:
         * The following three image input methods are provided. You can choose one of them.
         * 1. Use a public URL - Suitable for publicly accessible images.
         * 2. Use a local file - Suitable for local development and testing.
         * 3. Use Base64 encoding - Suitable for scenarios that involve private images or require encrypted transmission.
         */
        // [Method 1] Use a public image URL
        String image1 = "https://help-static-aliyun-doc.aliyuncs.com/file-manage-files/zh-CN/20251229/pjeqdf/car.webp";
        String image2 = "https://help-static-aliyun-doc.aliyuncs.com/file-manage-files/zh-CN/20251229/xsunlm/paint.webp";

        // [Method 2] Use a local file (supports absolute and relative paths)
        // Required format: file:// + file path
        // String image1 = "file:///path/to/your/car.png";
        // String image2 = "file:///path/to/your/paint.png";

        // [Method 3] Use a Base64-encoded image
        // String image1 = encodeFile("/path/to/your/car.png");
        // String image2 = encodeFile("/path/to/your/paint.png");

        // Build a multi-image input message
        ImageGenerationMessage message = ImageGenerationMessage.builder()
                .role("user")
                .content(Arrays.asList(
                        // Supports multi-image input. You can provide multiple reference images.
                        Collections.singletonMap("text", "Spray-paint the graffiti from image 2 onto the car in image 1"),
                        Collections.singletonMap("image", image1),
                        Collections.singletonMap("image", image2)
                )).build();

        ImageGenerationParam param = ImageGenerationParam.builder()
                .apiKey(apiKey)
                .model("wan2.7-image-pro")
                .n(1)
                .size("2K") // The wan2.7-image-pro model supports 4K resolution only for text-to-image generation. For image editing and composite image generation, the maximum supported resolution is 2K.
                .messages(Arrays.asList(message))
                .build();

        ImageGeneration imageGeneration = new ImageGeneration();
        ImageGenerationResult result = null;
        try {
            System.out.println("---async call for image editing, creating task----");
            result = imageGeneration.asyncCall(param);
        } catch (ApiException | NoApiKeyException | UploadFileException e) {
            throw new RuntimeException(e.getMessage());
        }
        System.out.println("Task creation result:");
        System.out.println(JsonUtils.toJson(result));

        String taskId = result.getOutput().getTaskId();
        // Wait for the task to complete
        waitTask(taskId);
    }

    public static void waitTask(String taskId) throws ApiException, NoApiKeyException, IOException {
        ImageGeneration imageGeneration = new ImageGeneration();
        System.out.println("\n---waiting for task completion----");
        ImageGenerationResult result = imageGeneration.wait(taskId, apiKey);
        // Fetch the resulting image URL and save it to a local file
        for (int i = 0; i < result.getOutput().getChoices().size(); i++) {
            List<Map<String, Object>> contents = result.getOutput().getChoices().get(i)
                    .getMessage().getContent();
            for (int j = 0; j < contents.size(); j++) {
                if ("image".equals(contents.get(j).get("type"))) {
                    String imageUrl = (String) contents.get(j).get("image");
                    String fileName = "output_" + i + "_" + j + ".png";
                    // The result URL is valid for 24 hours. Download the image in a timely manner.
                    try (InputStream in = new URL(imageUrl).openStream()) {
                        Files.copy(in, Paths.get(fileName), StandardCopyOption.REPLACE_EXISTING);
                    }
                    System.out.println("Image saved to " + fileName);
                }
            }
        }
    }

    public static void main(String[] args) throws ApiException, NoApiKeyException, UploadFileException, IOException {
        asyncCall();
    }
}

import com.alibaba.dashscope.aigc.imagegeneration.*;
import com.alibaba.dashscope.exception.ApiException;
import com.alibaba.dashscope.exception.NoApiKeyException;
import com.alibaba.dashscope.exception.UploadFileException;
import com.alibaba.dashscope.utils.Constants;
import com.alibaba.dashscope.utils.JsonUtils;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;
import java.util.Arrays;
import java.util.Base64;
import java.util.Collections;
import java.util.List;
import java.util.Map;

/**
 * An example of using wan2.7-image-pro for image series generation through synchronous calls in the Singapore region.
 */
public class Main {

    static {
        // The following URL is for the Singapore region. Replace {WorkspaceId} with your Bailian workspace ID. The base_url varies by region.
        Constants.baseHttpApiUrl = "https://{WorkspaceId}.ap-southeast-1.maas.aliyuncs.com/api/v1";
    }

    // If you have not configured the environment variable, replace the following line with your Model Studio API key: apiKey="sk-xxx"
    // API keys vary by region. To obtain an API key, visit: https://www.alibabacloud.com/help/en/model-studio/get-api-key
    static String apiKey = System.getenv("DASHSCOPE_API_KEY");

    // --- Base64 encoding function ---
    // The format for Base64 encoding is data:{MIME_type};base64,{base64_data}
    public static String encodeFile(String filePath) throws IOException {
        byte[] fileContent = Files.readAllBytes(Paths.get(filePath));
        String base64String = Base64.getEncoder().encodeToString(fileContent);
        String mimeType = Files.probeContentType(Paths.get(filePath));
        return "data:" + mimeType + ";base64," + base64String;
    }

    public static void basicCall() throws ApiException, NoApiKeyException, UploadFileException, IOException {
        /*
         * Image input methods (for image-to-image series generation):
         * Three image input methods are provided below. Choose one.
         * 1. Public URL: Suitable for images that are already publicly accessible.
         * 2. Local file: Suitable for local development and testing.
         * 3. Base64 encoding: Suitable for private images or scenarios that require encrypted transmission.
         */
        // Method 1: Use a public image URL
        // String image1 = "https://img.alicdn.com/imgextra/i4/O1CN01IM44WN23dq5uY1yla_!!6000000007279-49-tps-1024-1024.webp";

        // Method 2: Use a local file (supports both absolute and relative paths)
        // Format: file:// + file path
        // String image1 = "file:///path/to/your/image.png";

        // Method 3: Use a Base64-encoded image
        // String image1 = encodeFile("/path/to/your/image.png");

        // Build the text input message. This supports both text-to-image and image-to-image series generation. This example demonstrates text-to-image series generation.
        ImageGenerationMessage message = ImageGenerationMessage.builder()
                .role("user")
                .content(Collections.singletonList(
                        Collections.singletonMap("text", "A cinematic image series documenting the same stray orange cat, whose features must remain consistent. First image: In spring, the cat weaves through blooming cherry blossom trees. Second image: In summer, the cat cools off in the shade on an old street. Third image: In autumn, the cat walks on a carpet of golden fallen leaves. Fourth image: In winter, the cat leaves footprints in the snow.")
                )).build();
        // For image-to-image series generation, uncomment the following code and comment out the plain text message builder above.
        // ImageGenerationMessage message = ImageGenerationMessage.builder()
        //         .role("user")
        //         .content(Arrays.asList(
        //                 Collections.singletonMap("text", "Generate a four-season image series based on the style of the reference image."),
        //                 Collections.singletonMap("image", image1)
        //         )).build();

        ImageGenerationParam param = ImageGenerationParam.builder()
                .apiKey(apiKey)
                .model("wan2.7-image-pro")
                .messages(Collections.singletonList(message))
                .enableSequential(true)
                .n(4)
                .size("2K") // The wan2.7-image-pro model supports 4K resolution only for text-to-image generation. Image editing and image series generation support a maximum resolution of 2K.
                .build();

        ImageGeneration imageGeneration = new ImageGeneration();
        ImageGenerationResult result = null;
        try {
            System.out.println("----sync call, please wait a moment----");
            result = imageGeneration.call(param);
        } catch (ApiException | NoApiKeyException | UploadFileException e) {
            throw new RuntimeException(e.getMessage());
        }
        // Extract the resulting image URLs and save them to a local directory.
        for (int i = 0; i < result.getOutput().getChoices().size(); i++) {
            List<Map<String, Object>> contents = result.getOutput().getChoices().get(i)
                    .getMessage().getContent();
            for (int j = 0; j < contents.size(); j++) {
                if ("image".equals(contents.get(j).get("type"))) {
                    String imageUrl = (String) contents.get(j).get("image");
                    String fileName = "output_" + i + "_" + j + ".png";
                    // The resulting URL is valid for 24 hours. Be sure to download it promptly.
                    try (InputStream in = new URL(imageUrl).openStream()) {
                        Files.copy(in, Paths.get(fileName), StandardCopyOption.REPLACE_EXISTING);
                    }
                    System.out.println("Image saved to " + fileName);
                }
            }
        }
    }

    public static void main(String[] args) throws ApiException, NoApiKeyException, UploadFileException, IOException {
        basicCall();
    }
}

{
    "requestId": "4678c314-b37a-91c9-a2ae-2d3cd54bbxxx",
    "usage": {
        "input_tokens": 720,
        "output_tokens": 11,
        "total_tokens": 731,
        "image_count": 4,
        "size": "2048*2048"
    },
    "output": {
        "choices": [
            {
                "finish_reason": "stop",
                "message": {
                    "role": "assistant",
                    "content": [
                        {
                            "image": "https://dashscope-result-bj.oss-cn-beijing.aliyuncs.com/xxxxxx.png?Expires=xxxxxx",
                            "type": "image"
                        },
                        {
                            "image": "https://dashscope-result-bj.oss-cn-beijing.aliyuncs.com/xxxxxx.png?Expires=xxxxxx",
                            "type": "image"
                        },
                        {
                            "image": "https://dashscope-result-bj.oss-cn-beijing.aliyuncs.com/xxxxxx.png?Expires=xxxxxx",
                            "type": "image"
                        },
                        {
                            "image": "https://dashscope-result-bj.oss-cn-beijing.aliyuncs.com/xxxxxx.png?Expires=xxxxxx",
                            "type": "image"
                        }
                    ]
                }
            }
        ],
        "finished": true
    },
    "status_code": 200,
    "code": "",
    "message": ""
}

import com.alibaba.dashscope.aigc.imagegeneration.*;
import com.alibaba.dashscope.exception.ApiException;
import com.alibaba.dashscope.exception.NoApiKeyException;
import com.alibaba.dashscope.exception.UploadFileException;
import com.alibaba.dashscope.utils.Constants;
import com.alibaba.dashscope.utils.JsonUtils;

import java.io.IOException;
import java.io.InputStream;
import java.net.URL;
import java.nio.file.Files;
import java.nio.file.Paths;
import java.nio.file.StandardCopyOption;
import java.util.Arrays;
import java.util.Base64;
import java.util.Collections;
import java.util.List;
import java.util.Map;

/**
 * wan2.7-image-pro Image Set Generation - Asynchronous Invocation Example (Singapore Region)
 */
public class Main {

    static {
        // The following URL is for the Singapore region. Replace {WorkspaceId} with your Bailian workspace ID. The base_url varies by region.
        Constants.baseHttpApiUrl = "https://{WorkspaceId}.ap-southeast-1.maas.aliyuncs.com/api/v1";
    }

    // If you have not configured environment variables, replace the following line with your Model Studio API key: apiKey="sk-xxx"
    // The API key varies by region. To obtain an API key, visit https://www.alibabacloud.com/help/en/model-studio/get-api-key
    static String apiKey = System.getenv("DASHSCOPE_API_KEY");

    // --- Base64 encoding function ---
    // The Base64 encoding format is data:{MIME_type};base64,{base64_data}
    public static String encodeFile(String filePath) throws IOException {
        byte[] fileContent = Files.readAllBytes(Paths.get(filePath));
        String base64String = Base64.getEncoder().encodeToString(fileContent);
        String mimeType = Files.probeContentType(Paths.get(filePath));
        return "data:" + mimeType + ";base64," + base64String;
    }

    public static ImageGenerationResult waitTask(String taskId)
            throws ApiException, NoApiKeyException {
        ImageGeneration imageGeneration = new ImageGeneration();
        return imageGeneration.wait(taskId, apiKey);
    }

    public static void asyncCall() throws ApiException, NoApiKeyException, UploadFileException, IOException {
        /*
         * Description of image input methods (for image-to-image set generation scenarios):
         * The following three image input methods are provided. You can choose one of them.
         * 1. Use a public URL - suitable for publicly accessible images.
         * 2. Use a local file - suitable for local development and testing.
         * 3. Use Base64 encoding - suitable for private images or scenarios that require encrypted transmission.
         */
        // [Method 1] Use a public image URL
        // String image1 = "https://img.alicdn.com/imgextra/i4/O1CN01IM44WN23dq5uY1yla_!!6000000007279-49-tps-1024-1024.webp";

        // [Method 2] Use a local file (supports absolute and relative paths)
        // Format: file:// + file path
        // String image1 = "file:///path/to/your/image.png";

        // [Method 3] Use a Base64-encoded image
        // String image1 = encodeFile("/path/to/your/image.png");

        // Build the text input message (supports text-to-image set and image-to-image set generation. This example uses text-to-image set generation.)
        ImageGenerationMessage message = ImageGenerationMessage.builder()
                .role("user")
                .content(Collections.singletonList(
                        Collections.singletonMap("text", "A cinematic image set documenting the same stray orange cat. Its features must be consistent across all images. Image 1: In spring, the orange cat weaves through blooming cherry blossom trees. Image 2: In summer, the orange cat cools off in the shade of a tree on an old street. Image 3: In autumn, the orange cat steps on a carpet of golden fallen leaves. Image 4: In winter, the orange cat leaves footprints as it walks on the snow.")
                )).build();
        // For image-to-image set generation scenarios: uncomment the following code and comment out the plain text construction above.
        // ImageGenerationMessage message = ImageGenerationMessage.builder()
        //         .role("user")
        //         .content(Arrays.asList(
        //                 Collections.singletonMap("text", "Generate an image set of the four seasons based on the style of the reference image."),
        //                 Collections.singletonMap("image", image1)
        //         )).build();

        ImageGenerationParam param = ImageGenerationParam.builder()
                .apiKey(apiKey)
                .model("wan2.7-image-pro")
                .messages(Collections.singletonList(message))
                .enableSequential(true)
                .n(4)
                .size("2K") // The wan2.7-image-pro model supports 4K resolution only for text-to-image generation. Image editing and image set generation support a maximum resolution of 2K.
                .build();

        ImageGeneration imageGeneration = new ImageGeneration();
        ImageGenerationResult taskResult = null;
        try {
            System.out.println("----async call, creating task----");
            taskResult = imageGeneration.asyncCall(param);
        } catch (ApiException | NoApiKeyException | UploadFileException e) {
            throw new RuntimeException(e.getMessage());
        }
        System.out.println("Task created: " + JsonUtils.toJson(taskResult));

        // Wait for the task to complete.
        String taskId = taskResult.getOutput().getTaskId();
        ImageGenerationResult result = waitTask(taskId);
        // Fetch the resulting image URLs and save them to a local directory.
        for (int i = 0; i < result.getOutput().getChoices().size(); i++) {
            List<Map<String, Object>> contents = result.getOutput().getChoices().get(i)
                    .getMessage().getContent();
            for (int j = 0; j < contents.size(); j++) {
                if ("image".equals(contents.get(j).get("type"))) {
                    String imageUrl = (String) contents.get(j).get("image");
                    String fileName = "output_" + i + "_" + j + ".png";
                    // The result URL is valid for 24 hours. Download the image in a timely manner.
                    try (InputStream in = new URL(imageUrl).openStream()) {
                        Files.copy(in, Paths.get(fileName), StandardCopyOption.REPLACE_EXISTING);
                    }
                    System.out.println("Image saved to " + fileName);
                }
            }
        }
    }

    public static void main(String[] args) throws ApiException, NoApiKeyException, UploadFileException, IOException {
        asyncCall();
    }
}