Initializes all fields in the receiver. This method must be called
by all public constructors to ensure that all fields are initialized
for a new ImageData object. If a new field is added to the class,
then it must be added to this method.
<p>
This method is for internal use, and is not described further.
</p>
Initializes all fields in the receiver. This method must be called by all public constructors to ensure that all fields are initialized for a new ImageData object. If a new field is added to the class, then it must be added to this method. <p> This method is for internal use, and is not described further. </p>