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"));

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"));

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"));

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();

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();