Sentience Emulable by Algorithm?

How do we compute the form of those things that we see, such that we may recognize them? Could this process, of which we are able, be emulated by modern computers? If not, why? Could this limitation be transcended by advancements in computer science, such as the quantum computer or the DNA computer?

Complete Sensory Intake?

In those things that you claim to see, do you really see all of it? In other words, when you see a picture, do you see every pixel of the picture? What are the requirements that must be met before one can say that they’ve seen something? Only that the light enters the eye? Is there any information taken in that is ignored? How can the brain keep track of so much information without ignoring some of it?

Sensory Order

How do we maintain constancy and clarity of thought and concept, when our sensory data is so chaotic?