It rings sorta like Aristotles conception of being in relation to ontological metaphysics.
I just started studying Phenemonology, which has a lot in common with Aristotles ontological metaphysics.
But even if I told you it was made with photoshop or any other data pertaining to the picture, would that really make a difference in simpler terms?
The thing is, we don't think in simpler terms and as such don't experience the world in simple terms. In simple terms there is some circles with lines and color in them, that is what my perception tells me. However, I, as a rational being, am capable of adding more to my mere perceptions. In fact, I almost always add to my perceptions.
As to not accepting your theseis, the reason I cannot accept your thesis is because your thesis maintains that the rectangle isn't there to begin with, that it is only inferred. But you and I both know that the rectangle is there.
For exmaple, lets say I have some special ink that only shows under a black light. I draw a rectangle with the ink while you are watching and it fades away into the paper. You know the rectngle is there and I know the rectangle is there, however our perception tells us otherwise. Just because we don't directly percieve the rectangle that does not mean that it isn't there. This invisible rectangle is exactly simliar to your rectangle, you drew the rectangle even though we cannot see all the lines for it.
Now, that I apply certain qualities to this picture that are not perceived does not mean that "the world" has not given me these qualities. I'll say it again, I apply certain categories to the picture which tells me that the rectangle is there. I know it was drawn there with the rectangle tool using a photo editing program, as such, I experience it as being there.
Berkeley said it himself that to be is to be perceived.
Berkeley was working with false premises. There is more to being that perception, in human rationality at least.
(Oh, and to answer your questions about MS Paint and saving as a JPEG, the problem is that your using a Microsoft program!)