tencent cloud

All product documents
Cloud Object Storage
DocumentationCloud Object StorageSDK DocumentationJava SDKImage ProcessingBasic Image Processing
Basic Image Processing
Download PDF
Last updated: 2025-03-20 16:36:17
Basic Image Processing
Last updated: 2025-03-20 16:36:17
Download PDF

Overview

COS has integrated Cloud Infinite (CI), a one-stop professional multimedia solution that offers the image processing features outlined below. For more information, see Image Processing Overview.
Service
Feature
Description
Basic Image Processing
Proportional scaling, scaling image to target width and height, and more
Cut (regular cropping), crop (scaling and cropping), iradius (inscribed circle cropping), and scrop (smart cropping)
Adaptive rotation and common rotation
Format conversion, GIF optimization, and progressive display
Changes the quality of images in JPG and WEBP formats
Blurs images
Sharpens images
Watermarking
Obtaining image information
Includes EXIF data
Performs quick format conversion, scaling, and cropping to generate thumbnails


Basic Image Processing

When performing basic image processing, you need to specify the image processing rule. For more information, see Image Processing Overview. For all the code samples, visit GitHub. Below are some examples:

Scaling

String bucketName = "examplebucket-1250000000";
String key = "qrcode.png";
GetObjectRequest getObj = new GetObjectRequest(bucketName, key);
// Scale the width and height to 50% of the original image.
String rule = "imageMogr2/thumbnail/!50p";
getObj.putCustomQueryParameter(rule, null);
cosClient.getObject(getObj, new File("qrcode-50p.png"));

Cropping

String bucketName = "examplebucket-1250000000";
String key = "qrcode.png";
GetObjectRequest getObj = new GetObjectRequest(bucketName, key);
// Crop the radius of an inscribed circle to an integer greater than 0 and less than half of the shorter side of the original image. The center of the inscribed circle is the center of the image.
String rule = "imageMogr2/iradius/150";
getObj.putCustomQueryParameter(rule, null);
cosClient.getObject(getObj, new File("qrcode-cropping.png"));

Rotation

String bucketName = "examplebucket-1250000000";
String key = "qrcode.png";
GetObjectRequest getObj = new GetObjectRequest(bucketName, key);
// Rotate 90 degrees clockwise
String rule = "imageMogr2/rotate/90";
getObj.putCustomQueryParameter(rule, null);
cosClient.getObject(getObj, new File("qrcode-rotate.png"));

Obtaining average hue

String bucketName = "examplebucket-1250000000";
String key = "1.png";
GetObjectRequest getObj = new GetObjectRequest(bucketName, key);
// Obtaining image's average hue
String rule = "imageAve";
getObj.putCustomQueryParameter(rule, null);
COSObject object = cosClient.getObject(getObj);
COSObjectInputStream objectContent = object.getObjectContent();

Obtaining basic image information

String bucketName = "examplebucket-1250000000";
String key = "qrcode.png";
GetObjectRequest getObj = new GetObjectRequest(bucketName, key);
// Basic image information
String rule = "imageInfo";
getObj.putCustomQueryParameter(rule, null);
COSObject object = cosClient.getObject(getObj);
COSObjectInputStream objectContent = object.getObjectContent();

Was this page helpful?
You can also Contact Sales or Submit a Ticket for help.
Yes
No

Feedback

Contact Us

Contact our sales team or business advisors to help your business.

Contact Us
Technical Support

Open a ticket if you're looking for further assistance. Our Ticket is 7x24 avaliable.

Submit a Ticket
7x24 Phone Support
Hong Kong, China
+852 800 906 020 (Toll Free)
United States
+1 844 606 0804 (Toll Free)
United Kingdom
+44 808 196 4551 (Toll Free)
Canada
+1 888 605 7930 (Toll Free)
Australia
+61 1300 986 386 (Toll Free)
EdgeOne hotline
+852 300 80699
More local hotlines coming soon