If you have configured an image moderation callback address, the server will return the moderation results in JSON to the specified callback address after the image moderation is complete. You can then proceed with subsequent file processing operation based on the callback content.
This document describes the notification fields of the callback message sent by Tencent Cloud Streaming Services (CSS) to the user after the image moderation callback event is triggered.
Note
You need to understand how to configure callbacks and how you will receive messages via Tencent Cloud CSS before reading this document. For more information, see How to Receive Event Notifications.
By default, only potentially non-compliant results will be returned. Compliant results will not be returned.
It is recommended that you employ the type, score, and suggestion parameters from the callback message to moderate non-compliant images. The moderation system does not provide 100% accuracy, so a few images may be identified as potentially non-compliant or incorrectly identified. You can determine whether manual check is required based on the actual application scenario.
The image moderation service has been upgraded, and some callback message parameters have been adjusted. You are advised to refer to the latest version and the following parameter description. To ensure compatibility with old versions for users, we will still call back some parameters that are currently not used to the receiving server, including: tid, abductionRisk, confidence, normalScore, hotScore, pornScore, terrorScore, polityScore, illegalScore, similarScore, abuseScore, teenagerScore, adScore, and customScore.
Image Moderation Callback Parameters
Event Type Parameter
Event Type
Parameter Value
Image moderation
event_type = 317
Common Callback Parameters
Parameter
Type
Description
t
int64
Expiration time, which is the Unix timestamp when the event notification signature expires.
The default validity period of a message notification from Tencent Cloud is 10 minutes. If the time specified by the t value in a message notification has elapsed, then this notification is considered invalid, thereby preventing network replay attacks.
The format of t is a decimal Unix timestamp, i.e., the number of seconds that have elapsed since 00:00:00 (UTC/GMT time), January 1, 1970.
Note: Tencent Cloud concatenates the encryption key and t, calculates the sign value through MD5, and places it in the notification message. When your backend server receives the notification message, it can confirm whether the sign is correct based on the same algorithm and then determine whether the message is indeed from the Tencent Cloud backend.
Note：
You can set the callback key in Event Center > Live Stream Callback, which is used for authentication. We recommend you set this field to ensure data security.
Callback message parameters
Parameter
Required or Not
Data Type
Description
streamId
Mandatory
String
Stream name.
channelId
Mandatory
String
Channel ID.
img
Mandatory
String
Link to the moderated image
type
Mandatory
Array
Categories of negative labels with the highest priority in the detection result. For details, see the description of label.
score
Mandatory
Array
Scores of type
ocrMsg
Optional
String
OCR result (if any)
suggestion
Mandatory
String
Suggestion. Valid values:
Block
Review
Pass
label
Optional
String
Negative label with the highest priority in the detection result(labelResults,objectResults,ocrResults). This is the moderation result suggested by the model. We recommend you handle different types of violations and suggestions based on your business needs.
subLabel
Mandatory
String
Sub-label under the negative label with the highest priority in the detection result, such as porn - sexual acts. If no content is sub-labeled, this parameter will be empty.
Detection result of the object model, including label name, hit score, coordinates, scenario, and suggested operation regarding objects, advertising logos, QR codes, etc. For details, see the description of the data structure of ObjectResults. Note: This field may return null, indicating that no valid values can be obtained.
OCR result, including text coordinates, recognized text, suggested operation, etc. For details, see the description of the data structure of OcrResults.
Note: This field may return null, indicating that no valid values can be obtained.
Time when the request was sent, in Unix timestamp format
stream_param
Mandatory
String
Push parameters
app
Mandatory
String
Push domain name.
appid
Mandatory
Number
Application ID
appname
Mandatory
String
Push path
LabelResult
Hit result of the category model
Parameter
Type
Description
Scene
String
Scenario identified by the model, such as advertising, pornographic, and harmful
Suggestion
String
Operation suggested by the system for the current negative label. We recommend you handle different types of violations and suggestions based on your business needs. Returned values:
Object scenario identified, such as QR code, logo, and OCR
Suggestion
String
Operation suggested by the system for the current negative label. We recommend you handle different types of violations and suggestions based on your business needs. Returned values:
Block
Review
Pass
label
String
Negative label in the detection result
SubLabel
String
Sub-label name
Score
Integer
Sub-label hit score of the scenario model. Value range: 0-100
Object detection details. When the detection scenario is object, advertising logo, or QR code, it returns the label name, label value, label score, and location information of the detection frame.
Parameter
Type
Description
Id
Integer
ID of the object identified
Name
String
Object label identified
Value
String
Value or content of the object label identified. For example, if the label is QR code ( QrCode), this parameter is the URL of the QR code.
Score
Integer
Hit score of the object label. Value range: 0-100. For example, QrCode 99 indicates a high likelihood that the content is a QR code.
Coordinates (of the top-left corner), dimensions, and rotation of the object detection frame
Location
Coordinates and other information of the detection frame
Parameter
Type
Description
X
Float
Horizontal coordinate of the top-left corner
Y
Float
Vertical coordinate of the top-left corner
Width
Float
Width
Height
Float
Height
Rotate
Float
Rotation angle of the detection frame
OcrResult
OCR result
Parameter
Type
Description
Scene
String
Recognition scenario. Default value: OCR
Suggestion
String
Operation suggested by the system for the negative label with the highest priority. We recommend you handle different types of violations and suggestions based on your business needs. Returned values:
Block
Review
Pass
label
String
Negative label in the detection result
SubLabel
String
Sub-label name
Score
Integer
Sub-label hit score of the scenario model. Value range: 0-100
Scenario recognition result of the model. Default value: Similar
Suggestion
String
Operation suggested by the system. We recommend you handle different types of violations and suggestions based on your business needs. Returned values:
Block
Review
Pass
label
String
Negative label in the detection result
SubLabel
String
Sub-label name
Score
Integer
Recognition score of the image search model. Value range: 0-100
Yes
No
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