Either way it's activation. Activation means to get active with the book. Doesn't have to be superreading and dipping. If you intend to work toward conscious knowledge then you're activating the book.
Photoreading itself over and over isn't activating the text. It is providing repeated exposure for you other than conscious mind to work with the text.
You may photoread the text as often as you want. You may activate the book by whatever activation techniques you prefer.
Alex