This topic describes the /green/image/asyncscan operation that you can call to asynchronously moderate images. You can call this operation to moderate images for risky or illegal content. This operation is applicable to the following scenarios: pornography detection, terrorist content detection, ad violation detection, QR code detection, undesirable scene detection, and logo detection.

Scenarios

Scenario Description Category of the moderation result
Pornography detection Detects pornographic or sexy content in images. normal, sexy, and porn
Terrorist content detection Detects terrorist or political content in images. normal, bloody, explosion, outfit, logo, weapon, politics, violence, crowd, parade, carcrash, flag, location, and others
Ad violation detection Detects ads or illegal text in images. normal, ad, politics, porn, abuse, terrorism, contraband, spam, npx, qrcode, and programCode
Note By default, you can use only the normal and ad categories. If you want to use other categories, submit a ticket.
QR code detection Detects QR codes or mini program codes in images. normal, qrcode, and programCode
Note By default, you can use only the normal and qrcode categories. If you want to use other categories, submit a ticket.
Undesirable scene detection Detects undesirable scenes, such as black screen, black edge, dark image, picture-in-picture, smoking, and live broadcasting in a running vehicle, in images. normal, meaningless, PIP, smoking, and drivelive
Logo detection Detects logos, such as TV station logos and trademarks, in images. normal, TV, and trademark

Description about the /green/image/asyncscan operation

Operation: /green/image/asyncscan

You can call this operation to submit asynchronous image moderation tasks. For more information about how to construct an HTTP request, see Request structure. You can also select an existing HTTP request. For more information, see SDK overview.

  • Billing method:

    You are charged for calling this operation. For more information about the billing method, seeContent Moderation Pricing.

  • Response timeout:

    The maximum response time that is allowed for a synchronous moderation request is 6s. If the moderation is not complete within 6s, a timeout error is returned. If you do not need to obtain moderation results in real time, you can send asynchronous moderation requests. In most cases, we recommend that you send synchronous moderation requests because synchronous moderation operations are easier to call. We recommend that you set the timeout period to 6s for calling synchronous moderation operations.

  • Return results:

    If you send asynchronous moderation requests, the moderation results are not returned in real time. To obtain moderation results, you can poll the moderation results at regular intervals or enable callback notification. The moderation results are retained for up to 1 hour.

    • Enable callback notification to obtain moderation results: When you submit asynchronous moderation tasks, you can specify a callback URL for receiving moderation results in the callback parameter of the moderation request. For more information about the callback parameter, see Request parameters.
    • Poll moderation results at regular intervals: You do not need to set the callback parameter when you submit asynchronous moderation tasks. After you submit the tasks, you can call the result query operation to query moderation results. For more information about the operation, see Description about the /green/image/results operation.
  • Limits on images:
    • The images must use HTTP or HTTPS URLs.
    • The images must be in the PNG, JPG, JPEG, BMP, GIF, or WEBP format.
    • An image can be up to 10 MB in size. The limit for the image size is applicable to both synchronous and asynchronous moderation operations. If you have special requirements, for example, you want to moderate larger images, submit a ticket to raise the threshold.
    • The duration for downloading an image is limited to 3s. If an image fails to be downloaded within 3s, a timeout error is returned.
    • We recommend that you submit images of at least 256 × 256 pixels to ensure the moderation effects.
    • The response time of an operation for moderating images varies based on the duration for downloading these images. Make sure that you use a stable and reliable storage service to store the images to be moderated. We recommend that you use Alibaba Cloud Object Storage Service (OSS) or Content Delivery Network (CDN).

Request parameters

Parameter Type Required Description
bizType String No The business scenario. You can create a business scenario in the Alibaba Cloud Content Moderation console. For more information, see Customize policies for machine-assisted moderation. You can also submit a ticket to ask Alibaba Cloud engineers to help you create a business scenario.
scenes StringArray Yes The moderation scenario. Valid values:
  • porn: pornography detection
  • terrorism: terrorist content detection
  • ad: ad violation detection
  • qrcode: QR code detection
  • live: undesirable scene detection
  • logo: logo detection
You can specify multiple scenarios. For example, you can specify both porn and terrorism in the scenes parameter to detect pornographic and terrorist content.
Note If your moderation occurs in multiple scenarios at a time, you are charged the cumulative fee of all scenarios. The fee of each scenario equals the number of images that are moderated in the scenario multiplied by the unit price of the scenario.
callback String No The callback URL for notifying you of asynchronous moderation results. HTTP and HTTPS URLs are supported. If you do not set this parameter, you must poll moderation results at regular intervals.
If you set the callback parameter in the moderation request, make sure that the specified HTTP or HTTPS URL meets the following requirements: supports the POST method, uses UTF-8 to encode the transmitted data, and supports the checksum and content parameters. To send moderation results to the specified callback URL, Content Moderation returns the checksum and content parameters in callback notifications based on the following rules and format:
  • checksum: the string in the UID + Seed + Content format that is generated by the Secure Hash Algorithm 256 (SHA-256) algorithm. UID indicates the ID of your Alibaba Cloud account. You can query the ID in the Alibaba Cloud Management Console. To prevent data tampering, you can use the SHA-256 algorithm to generate a string when your server receives a callback notification and verify the string against the received checksum parameter.
    Note UID must be the ID of an Alibaba Cloud account, but not the ID of a RAM user.
  • content: the JSON-formatted string to be parsed to the callback data in the JSON format. For more information about the format of the content parameter, see the sample success responses of each operation that you can call to query asynchronous moderation results.
Note If your server receives a callback notification, the server sends HTTP status code 200 to Content Moderation. If your server fails to receive a callback notification, the server sends other HTTP status codes to Content Moderation. If your server fails to receive a callback notification, Content Moderation continues to push the callback notification until your server receives it. Content Moderation can push a callback notification repeatedly for up to 16 times. After 16 times, Content Moderation stops pushing the callback notification. In this case, we recommend that you check the status of the callback URL.
seed String No A random string that is used to generate a signature for the callback notification request.

The string can be up to 64 characters in length and can contain letters, digits, and underscores (_). You can customize this string. It is used to verify the callback notification request when Alibaba Cloud Content Moderation pushes callback notifications to your server.

Note This parameter is required if you set the callback parameter.
offline Boolean No The moderation mode. Valid values:
  • true: indicates the nearline moderation mode. In nearline moderation mode, the moderation tasks you submit may not be processed in real time, but can be queued for processing and will start within 24 hours.
  • false: indicates the real-time moderation mode. It is the default value. In this mode, Content Moderation rejects moderation requests that exceed the concurrency limit.
tasks JSONArray Yes The list of moderation objects. Each element in the JSON array is an image moderation task structure. For more information about the structure of each element, see task.
Table 1. task
Parameter Type Required Description
clientInfo JSONObject No The information about the client. For more information, see the "Common request parameters" section of the Common parameters topic.
The server determines whether to use the global clientInfo parameter or the clientInfo parameter that is described in this table.
Note The clientInfo parameter in this table takes priority over the global one.
dataId String No The ID of the moderation object.

The ID can contain letters, digits, underscores (_), hyphens (-), and periods (.) and can be up to 128 characters in length. This ID uniquely identifies your business data.

url String Yes The URL of the image to be moderated.
extras JSONObject No The extra parameters that you can set for calling the operation. This parameter is not required for image moderation.
interval Integer No The interval between two frames that are consecutively captured. This parameter is dedicated for GIF or long image moderation.
  • A GIF image can be regarded as an array of frames. One frame is captured for moderation from every n frames. The n is specified by the interval parameter. The system captures frames from GIF images only when this parameter is specified.
  • Long images can be in portrait or horizontal mode.
    • To moderate a long portrait image, in which the height is greater than 400 pixels and the ratio of height to width is greater than 2.5, you can divide the height by the width and round up the result to the nearest integer as the total number of frames.
    • To moderate a long horizontal image, in which the width is greater than 400 pixels and the ratio of width to height is greater than 2.5, you can divide the width by the height and round up the result to the nearest integer as the total number of frames.

By default, only the first frame of a GIF image or a long image is moderated. You can use the interval parameter to specify the interval between two frames that the system consecutively captures. This helps reduce moderation costs.

Note The interval and maxFrames parameters must be used in pairs. For example, the interval parameter is set to 2 and the maxFrames parameter is set to 100 for moderating a GIF image or a long image. In this example, one out of every two frames is moderated and a maximum of 100 frames are moderated. The fee is calculated based on the actual number of moderated frames.
maxFrames Integer No The maximum number of frames to be captured. This parameter is dedicated for GIF or long image moderation. Default value: 1.

If the value of the interval parameter multiplied by that of the maxFrames parameter is smaller than the total number of frames in a GIF image or a long image, the interval for capturing frames is automatically changed to the integer rounded up from the result of dividing the total number of frames in the image by the value of the maxFrames parameter. This helps improve the overall moderation effects.

Response parameters

Parameter Type Description
code Integer The returned HTTP status code.

For more information, see Common response parameters.

msg String The returned message.
dataId String The ID of the moderation object.
Note If you set the dataId parameter in the moderation request, the dataId parameter is returned in the response.
taskId String The ID of the moderation task.
url String The URL of the moderation object.

Examples

Sample requests
{
    "scenes": [
        "porn"
    ],
    "tasks": [
        {
            "dataId": "test4lNSMdggA0c56MMvfYoh4e-1mwxpx",
            "url": "https://img.alicdn.com/tfs/TB1urBOQFXXXXbMXFXXXXXXXXXX-1442-257.png"
        }
    ]
}
Sample success responses
{
    "code": 200,
    "msg": "OK",
    "requestId": "95AD868A-F5D2-4AEA-96D4-E0273B8E074C",
    "data": [
        {
            "code": 200,
            "msg": "OK",
            "dataId": "test4lNSMdggA0c56MMvfYoh4e-1mwxpx",
            "taskId": "fdd25f95-4892-4d6b-aca9-7939bc6e9baa-1486198766695",
            "url": "https://img.alicdn.com/tfs/TB1urBOQFXXXXbMXFXXXXXXXXXX-1442-257.png"
        }
    ]
}

Description about the /green/image/results operation

Operation: /green/image/results

You can call this operation to query asynchronous image moderation results. For more information about how to construct an HTTP request, see Request structure. You can also select an existing HTTP request. For more information, see SDK overview.

  • Billing method:

    This operation is free of charge.

  • Response timeout:
    We recommend that you query moderation results at least 30s after you send an asynchronous moderation request and obtain the value of the taskId parameter.
    Note If you set the offline parameter to true, the validity period for the value of the taskId parameter is 24 hours. If you set the offline parameter to false, the validity period for the value of the taskId parameter is an hour. The default value of the offline parameter is false.

Request parameters

Parameter Type Required Description
body JSONArray Yes The list of IDs of asynchronous moderation tasks that you want to query. The array can contain up to 100 elements.

Response parameters

Parameter Type Description
code Integer The returned HTTP status code.

For more information, see Common response parameters.

msg String The returned message.
dataId String The ID of the moderation object.
Note If you set the dataId parameter in the moderation request, the dataId parameter is returned in the response.
taskId String The ID of the moderation task.
url String The URL of the moderation object.
extras JSONObject The additional information.

If you specify ad in the scenes parameter to detect ad violations, the extras parameter can return the following content:

hitLibInfo: the information about the custom text library that the detected text in the moderated image hits. This parameter is of the array type. For more information about the structure, see hitLibInfo.

Example:
"hitLibInfo":[{"context":"Haokan","libCode":"2144002","libName":"Text pattern library a"}]
results JSONArray The return results. If HTTP status code 200 is returned after a successful call, the array in the return results contains one or more elements. Each element is a structure. For more information about the structure of each element, see result.
Table 2. result
Parameter Type Description
scene String The moderation scenario of the moderated image, which you specify in the moderation request. Valid values:
  • porn: pornography detection
  • terrorism: terrorist content detection
  • ad: ad violation detection
  • qrcode: QR code detection
  • live: undesirable scene detection
  • logo: logo detection
label String The category of the moderation result. Valid values vary based on the specified moderation scenario.
  • If the scenes parameter is set to porn, the valid values are:
    • normal: normal
    • sexy: sexy content
    • porn: pornographic content
  • If the scenes parameter is set to terrorism, the valid values are:
    • normal: normal
    • bloody: bloody content
    • explosion: explosion and smoke
    • outfit: special costume
    • logo: logo
    • weapon: weapon
    • politics: political content
    • violence: violence
    • crowd: crowd
    • parade: parade
    • carcrash: car accident
    • flag: flag
    • location: landmark
    • others: other specified content
  • If the scenes parameter is set to ad, the valid values are:
    Note By default, only normal and ad can be returned. If you want to use other categories, submit a ticket.
    • normal: normal
    • ad: other ads
    • politics: political content in text
    • porn: pornographic content in text
    • abuse: abuse in text
    • terrorism: terrorist content in text
    • contraband: prohibited content in text
    • spam: junk content in text
    • npx: illegal ad
    • qrcode: QR code
    • programCode: mini program code
  • If the scenes parameter is set to qrcode, the valid values are:
    Note By default, mini program code detection is disabled. If you want to enable mini program code detection, submit a ticket.
    • normal: normal
    • qrcode: QR code
    • programCode: mini program code
  • If the scenes parameter is set to live, the valid values are:
    • normal: normal
    • meaningless: meaningless, such as black or white screen
    • PIP: small picture
    • smoking: smoking content
    • drivelive: live broadcasting in a running vehicle
  • If the scenes parameter is set to logo, the valid values are:
    • normal: normal
    • TV: TV station logo
    • trademark: trademark
sublabel String If the scenes parameter is set to porn or terrorism, the subcategory of the moderation result can be returned.

By default, this parameter is not returned. If you want this parameter to be returned, submit a ticket. This parameter can be returned only after it is configured by Alibaba Cloud engineers.

suggestion String The recommended subsequent operation for you to perform. Valid values:
  • pass: The moderation object does not require further actions.
  • review: The moderation object contains suspected violations and requires human review.
  • block: The moderation object contains violations. We recommend that you delete or block the object.
rate Float The score of the confidence level. Valid values: 0 to 100. A greater value indicates a higher confidence level.
If a value of pass is returned for the suggestion parameter, a higher confidence level indicates a higher probability that the content is normal. If a value of review or block is returned for the suggestion parameter, a higher confidence level indicates a higher probability that the content contains violations.
Notice This score is for reference only. We strongly recommend that you do not use this score in your business. We recommend that you use the values that are returned for the suggestion, label, and sublabel parameters to determine whether the content contains violations. The sublabel parameter is returned by specific operations.
frames JSONArray The temporary access URL of each frame that is truncated from the moderated image because the image is too long. For more information about the structure, see frame.
hintWordsInfo JSONArray The information about the term that the detected ad in the moderated image hits. This parameter is of the array type. For more information about the structure, see hintWordsInfo.
Note This parameter is applicable only to ad violation detection.
Example:
"hintWordsInfo":[{"context":"Sensitive words"}]
qrcodeData StringArray The information about the text that is included in the detected QR code in the moderated image.
Note This parameter is applicable only to QR code detection.
programCodeData JSONArray The location information about the detected mini program code in the moderated image. For more information about the structure, see programCodeData.
Note This parameter is applicable only to mini program code detection. Make sure that mini program code detection is enabled.
logoData JSONArray The information about the detected logo in the moderated image. For more information about the structure, see logoData.
Note This parameter is applicable only to logo detection.
sfaceData JSONArray The information about the detected terrorist content in the moderated image. For more information about the structure, see sfaceData.
Note This parameter is applicable only to terrorist content detection.
ocrData StringArray The information about the detected complete text in the moderated image.
Note By default, this parameter is not returned. If you want this parameter to be returned, submit a ticket.
Table 3. frame
Parameter Type Description
rate Float The score of the confidence level. Valid values: 0 to 100. A higher confidence level indicates higher reliability of the moderation result. We recommend that you do not use this score in your business.
url String The temporary access URL of the truncated frame. The URL is valid for 5 minutes.
Table 4. programCodeData
Parameter Type Description
x Float The distance between the upper-left corner of the mini program code area and the y-axis, with the upper-left corner of the image being the coordinate origin. Unit: pixels.
y Float The distance between the upper-left corner of the mini program code area and the x-axis, with the upper-left corner of the image being the coordinate origin. Unit: pixels.
w Float The width of the mini program code area. Unit: pixels.
h Float The height of the mini program code area. Unit: pixels.
Table 5. logoData
Parameter Type Description
type String The type of the detected logo. For example, a value of TV indicates the logo of a TV station.
name String The name of the detected logo.
x Float The distance between the upper-left corner of the logo area and the y-axis, with the upper-left corner of the image being the coordinate origin. Unit: pixels.
y Float The distance between the upper-left corner of the logo area and the x-axis, with the upper-left corner of the image being the coordinate origin. Unit: pixels.
w Float The width of the logo area. Unit: pixels.
h Float The height of the logo area. Unit: pixels.
Table 6. sfaceData
Parameter Type Description
x Float The distance between the upper-left corner of the face area and the y-axis, with the upper-left corner of the image being the coordinate origin. Unit: pixels.
y Float The distance between the upper-left corner of the face area and the x-axis, with the upper-left corner of the image being the coordinate origin. Unit: pixels.
w Float The width of the face area. Unit: pixels.
h Float The height of the face area. Unit: pixels.
faces JSONArray The information about the recognized face. The array contains the following parameters:
  • name: the name of the recognized face. The value is a string.
  • rate: the score of the confidence level. Valid values: 0 to 100. A greater value indicates a higher confidence level. A higher confidence level indicates higher reliability of the facial recognition result. The value is a floating-point number.
  • id: the ID of the recognized face. The value is a string.
Table 7. hitLibInfo
Parameter Type Description
context String The custom text that the detected text hits.
libCode String The code of the library that contains the custom text hit by the detected text.
libName String The name of the library that contains the custom text hit by the detected text.
Table 8. hintWordsInfo
Parameter Type Description
context String The term that the detected text hits.

Examples

Sample requests
[
    "fdd25f95-4892-4d6b-aca9-7939bc6e9baa-1486198766695"
]
Sample success responses
{
     "msg": "OK",
     "code": 200,
     "data": [
          {
               "msg": "OK",
               "code": 200,
               "dataId": "test4lNSMdggA0c56MMvfYoh4e-1mwxpx",
               "extras": {

            },
               "results": [
                    {
                         "rate": 99.63,
                         "suggestion": "block",
                         "label": "sexy",
                         "scene": "porn"
                },
                    {
                         "label": "politics",
                         "rate": 91.54,
                         "scene": "terrorism",
                         "sfaceData": [
                              {
                                   "faces": [
                                        {
                                             "id": "AliFace_0001234",
                                             "name": "Hit name",
                                             "rate": 91.54
                                }
                            ],
                                   "h": 131,
                                   "w": 97,
                                   "x": 49,
                                   "y": 39
                        }
                    ],
                         "suggestion": "block"
                },
                    {
                         "extras": {
                              "qrcodes": "http://xxxx.xxx.com/0.ZZOliO",
                              "npx": "72.01",
                              "hitCustomLibCode": "8012345000",
                              "hitCustomLibName": "Name of the custom image library",
                              "hitLibInfo": [
                                   {
                                        "context": "Hit text",
                                        "libCode": "123456",
                                        "libName": "Name of the text library"
                            }
                        ]
                    },
                         "programCodeData": [
                              {
                                   "w": 402.0,
                                   "h": 413.0,
                                   "x": 11.0,
                                   "y": 0.0
                        }
                    ],
                         "frames": [
                              {
                                   "rate": 89.85,
                                   "url": "http://xxx.xxx.com/xxx-0.jpg"
                        },
                              {
                                   "rate": 68.06,
                                   "url": "http://xxx.xxx.com/xxx-1.jpg"
                        }
                    ],
                         "rate": 99.91,
                         "suggestion": "block",
                         "label": "ad",
                         "scene": "ad"
                },
                    {
                         "rate": 99.91,
                         "suggestion": "block",
                         "label": "drug",
                         "scene": "live"
                },
                    {
                         "qrcodeData": [
                              "http://xxx.xxx.com/01ZZOliO"
                    ],
                         "rate": 99.91,
                         "suggestion": "review",
                         "label": "qrcode",
                         "scene": "qrcode"
                },
                    {
                         "logoData": [
                              {
                                   "name": "xxx TV",
                                   "type": "TV",
                                   "x": 140,
                                   "y": 68,
                                   "w": 106,
                                   "h": 106
                        }
                    ],
                         "rate": 99.9,
                         "suggestion": "block",
                         "label": "TV",
                         "scene": "logo"
                }
            ],
               "taskId": "fdd25f95-4892-4d6b-aca9-7939bc6e9baa-1486198766695",
               "url": "https://img.alicdn.com/tfs/TB1urBOQFXXXXbMXFXXXXXXXXXX-1442-257.png"
        }
    ],
     "requestId": "69B41AE8-1234-1234-1234-12D395695D2D"
}