Obtaining Image’s Average Hue

Feature Overview
CI uses the imageAve API to obtain the average hue of an image. 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.
API Format
GET /<ObjectKey>?imageAve HTTP/1.1
Host: <BucketName-APPID>.cos.<Region>.myqcloud.com
Date: <GMT Date>
Authorization: <Auth String>
Parameter description
Operation: imageAve
Parameter
Description
ObjectKey
Object name, such as folder/sample.jpg.
Examples
Example 1: Public-read
Request
http://examples-1251000004.cos.ap-shanghai.myqcloud.com/sample.jpeg?imageAve
Response
{"RGB": "0x736246"}
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>&imageAve
Note: 
 You can obtain the value of <signature> by referring to Request Signature.
Notes
To prevent unauthorized users from accessing or downloading the input image by using a URL that does not contain any processing parameter, you can add the processing parameters to the request signature, making the processing parameters the key of the parameter with the value left empty. The following is a simple example for your reference (it might have expired or become inaccessible). For more information, see Upload via Pre-Signed URL.
http://examples-1251000004.cos.ap-shanghai.myqcloud.com/sample.jpeg?q-sign-algorithm=sha1&q-ak=AKID********************&q-sign-time=1593342360;1593342720&q-key-time=1593342360;1593342720&q-header-list=&q-url-param-list=watermark%252f1%252fimage%252fahr0cdovl2v4yw1wbgvzlteyntewmdawmdqucgljc2gubxlxy2xvdwquy29tl3nodwl5aw4uanbn%252fgravity%252fsoutheast&q-signature=26a429871963375c88081ef60247c5746e834a98&watermark/1/image/aHR0cDovL2V4YW1wbGVzLTEyNTEwMDAwMDQucGljc2gubXlxY2xvdWQuY29tL3NodWl5aW4uanBn/gravity/southeast

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Parameter	Description
ObjectKey	Object name, such as `folder/sample.jpg`.

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Feature Overview

API Format

Parameter description

Examples

Example 1: Public-read

Request

Response

Example 2: Private-read with a signature carried

Notes