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Abnormal Image Detection

Last updated: 2024-02-18 10:36:36

    Feature Overview

    CI uses the ImageInspect API to detect whether other types of suspicious files are hidden in an image.

    Restrictions

    Format: This feature can detect three types of abnormal images: PNG with TS video stream, BMP with TS video stream, and TS video stream (with only the extension changed).
    Size: The input image cannot be larger than 32 MB, with its width and height not exceeding 30,000 pixels respectively, and the total number of pixels not exceeding 250 million. The width and height of the output image cannot exceed 9,999 pixels respectively. For an animated input image, the total number of pixels (width * height * number of frames) cannot exceed 250 million.

    API Format

    GET /<ObjectKey>?ci-process=ImageInspect HTTP/1.1
    Host: <BucketName-APPID>.cos.<Region>.myqcloud.com
    Date: <GMT Date>
    Authorization: <Auth String>

    Parameters

    Request parameters

    Operation name: ImageInspect.
    Parameter
    Description
    ObjectKey
    Object name, such as folder/sample.jpg.

    Response parameters

    Parameter
    Description
    picSize
    Image size in bytes
    picType
    Image format, such as JPG and PNG.
    suspicious
    Whether non-image files are detected. Valid values: false (no), true (yes).
    suspiciousBeginByte
    The starting byte position of the detected suspicious file in bytes
    suspiciousEndByte
    The ending byte position of the detected suspicious file in bytes
    suspiciousSize
    Size of the detected suspicious file
    suspiciousType
    Type of the detected suspicious file, such as MPEG-TS.

    Examples

    Example 1: Public-read

    Request

    http://examples-1251000004.cos.ap-shanghai.myqcloud.com/sample.jpeg?ci-process=ImageInspect

    Response

    {"picSize":1097476,"picType":"PNG","suspicious":true,"suspiciousBeginByte":120,"suspiciousEndByte":1097475,"suspiciousSize":1097356,"suspiciousType":"MPEG-TS"}

    Example 2: Private-read with a signature carried

    This example obtains the average hue in the same way as in the example above except that a signature is carried. The signature is joined with other parameters using an ampersand (&):
    http://examples-1251000004.cos.ap-shanghai.myqcloud.com/sample.jpeg?q-sign-algorithm=<signature>&ci-process=ImageInspect
    Note:
    You can obtain the value of <signature> by referring to Request Signature.
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