Gets a property of this image by name.
Individual property names are defined by the various image formats. If a property is not defined for a particular image, this method returns the UndefinedProperty
object.
If the properties for this image are not yet known, this method returns null
, and the ImageObserver
object is notified later.
The property name "comment"
should be used to store an optional comment which can be presented to the application as a description of the image, its source, or its author.