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支持多种类别：人物、商品、动物、汽车、图形等。\n* 便于串联其他 AI 任务：输出的文件 ID 转眼就能接进其他 AI 任务。\n\n![](https://plugins-media.makeupar.com/smb/blog/post/2023-11-03/54285311-7c65-4658-9e27-11bf5c8dfe56.jpg)\n\n## 接入指南\n* AI 图片去背景怎么做\n1. **调整源图尺寸**</br>\n  把图片缩放到支持的尺寸范围，详见 **[文件规格与错误码](#section/overview/File-Specs-and-Errors)**\n\n2. **用 File 接口上传文件**</br>\n  通过 ***/s2s/v2.0/file*** 接口上传目标用户图片。\n    - 图片要求\n      - 详见 **[文件规格与错误码](#section/overview/File-Specs-and-Errors)**。\n    - ***重要***：只调用 File 接口并不等于上传了文件。您必须**手动把文件上传到 File 接口响应中给出的那个 URL**，那个 URL 就是您的上传目标，务必确认文件已成功传过去，再继续往下做。<br>\n    调用 AI 接口之前，请确认文件已上传成功。先用 File 接口取到一个上传 URL，把文件上传到该位置。上传完成后，您会在响应中收到一个 ***file_id***，调用与该文件相关的 AI 功能时就用它。\n    \n      > **警告：** 请注意，若未把文件上传到 File 接口响应中给出的 URL，调用 AI 接口时会得到 500 Server Error / unknown_internal_error 或 404 Not Found 错误。\n\n3. **执行 AI 任务**</br>\n  上传完成后，用文件 ID 调用 POST 'task/sod' 执行 AI 任务，并取得用于监控的 ***task_id***。\n\n4. **用 Webhook 或轮询监控任务状态，直到成功或报错**</BR>\n用这个 ***task_id*** 配置 Webhook 或实现轮询，在整个保留期内监控任务状态。AI 引擎完成任务之前，状态会一直是 running，这一阶段不消耗点数。处理完成后，任务状态会变为 success 或 error。\n\n1. **任务成功后取回结果**</BR>\n引擎成功处理您的输入文件、生成出图后，任务状态会变为 'success'。您会得到处理后图片的 URL 以及一个 dst_id，可直接串联下一个 AI 任务，不必把结果图重新上传。\n只有这种情况才会消耗点数。若引擎处理失败，任务状态会变为 'error'，不消耗点数。</BR>\n扣除点数时，系统优先扣除临近到期的点数；到期日相同时，优先扣除最早取得的点数。\n\n* 应用场景示例：\n常见实现方式：\n![](https://bcw-media.s3.ap-northeast-1.amazonaws.com/Transparen_Background_aca3cdbd83.jpg)\n\n## 输入与输出\n* 输入\n   * `Image`\n- **类型：** `image`\n- **说明：** 前景清楚的图片。\n\n实际应用场景（输入）： \n![](https://bcw-media.s3.ap-northeast-1.amazonaws.com/yce_removal_bg_s4_poster_1_289b8eaf81.png)\n\n---\n\n* 输出\n   * `Foreground image`\n- **类型：** `image`\n- **说明：** 已去除背景的图片。\n\n实际应用场景（输出）：\n![](https://bcw-media.s3.ap-northeast-1.amazonaws.com/yce_removal_bg_s4_poster_2_a6bc3c5f6a.png)\n\n## 文件规格与错误码\n* 支持的格式与尺寸\n\n|AI 功能|支持尺寸|文件大小|支持格式|\n|  ----  | ----  | ----  | ----  |\n|AI 图片去背景|输入与输出图片的建议与限制如下：</br>分辨率：4096 × 4096 像素（最长边不得超过 4096 像素）|<10MB|JPG 与 PNG|\n\n* 错误码\n\n|错误码|说明|\n|  ----  | ----  |\n|exceed_max_filesize|输入文件大小超出上限|\n|invalid_parameter|参数取值无效|\n|error_download_image|下载原图出错|\n|error_download_mask|下载蒙版图片出错|\n|error_decode_image|解码原图出错|\n|error_decode_mask|解码蒙版图片出错|\n|error_download_video|下载源视频出错|\n|error_decode_video|解码源视频出错|\n|error_nsfw_content_detected|在原图中检测到不适宜内容（NSFW）|\n|error_no_face|源图中未检测到人脸|\n|error_pose|源图中检测不到姿态|\n|error_face_parsing|源图的人脸分割失败|\n|error_inference|推理流程出错|\n|exceed_nsfw_retry_limits|为避免生成不适宜内容，重试次数已达上限|\n|error_upload|上传结果图片出错|\n|error_multiple_people|源图中检测到多人|\n|error_no_shoulder|源图中看不到肩膀|\n|error_large_face_angle|上传图片中的脸部角度过大|\n|error_hair_too_short|输入的头发太短|\n|error_unexpected_video_duration|视频时长与 dstDuration 不一致|\n|error_bald_image|输入的发型为光头|\n|error_unsupport_ratio|输入图片的宽高比不受支持|\n|unknown_internal_error|其他|\n\n---\n\n## 点数消耗\n\n| AI 功能 | 消耗点数 |\n|---|---|\n| AI 图片去背景 V1.0 | 1 |\n\n---\n"}},"baseSlug":"/zh-cn/reference/ai_background_removal","routesMapping":{}}