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Basic Image Processing

Last updated: 2024-02-29 17:31:27

    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
    Regular cropping, cropping and scaling, cropping to circle, smart face cropping
    Adaptive rotation, regular rotation
    Format conversion, GIF format optimization, progressive display
    Quality change for JPG and WebP images
    Image blurring
    Image sharpening
    Watermarking
    Image information acquisition
    Including EXIF information
    Quick image format conversion, scaling, and cropping for thumbnail generation
    

    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 input 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 zero and less than half of the shorter side of the input 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 clockwise by 90 degrees
    String rule = "imageMogr2/rotate/90";
    getObj.putCustomQueryParameter(rule, null);
    cosClient.getObject(getObj, new File("qrcode-rotate.png"));
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