Add watermarks - Object Storage Service
vertical offset can regulate the watermark layout when the image has multiple watermarks.
The URL-safe Base64 encoding can be used during image processing. For more information, see RFC4648 or the URL-safe Base64 encoding section ...
Terms - IoT Platform
DeviceName is the device name that is automatically generated or defined by the user during device authentication and communication. You must keep this parameter safe.
DeviceSecret is the private key issued by IoT ...