Obtaining Basic Image Information

Last updated: 2021-08-12 10:11:06

    Overview

    COS uses the imageInfo API provided by CI to query an image’s basic information, such as its format, width, and height. The input image cannot be larger than 32 MB, with its width and height not exceeding 30,000 pixels, and the total number of pixels not exceeding 250 million. The width and height of the output image cannot exceed 9,999 pixels. For an input animated image, the total number of pixels (Width x Height x Number of frames) cannot exceed 250 million pixels.

    Note:

    Image Processing is charged by CI. For detailed pricing, please see Basic image processing fee in Billing and Pricing.

    API Format

    download_url?imageInfo
    

    Parameters

    Operation: imageInfo

    Parameter Description
    download_url URL of the input image, formatted as &dxlt;BucketName-APPID>.cos.&dxlt;Region>.myqcloud.com/&dxlt;picture name>
    Example: examplebucket-1250000000.cos.ap-shanghai.myqcloud.com/picture.jpeg

    Examples

    Sample request 1: public-read

    http://examples-1251000004.cos.ap-shanghai.myqcloud.com/sample.jpeg?imageInfo
    

    Response

    {"format": "jpeg", "width": "960", "height": "540", "size": "158421", "md5": "77a16fa70e2eba652fb42e8a639c52f2", "photo_rgb": "0x736246"}
    

    Sample request 2: private-read with a signature carried

    This example obtains the image information 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>&imageInfo
    
    Note:

    You can obtain the value of <signature> by referring to Request Signature.