Raw Deal
I told you it would look different! Here's why: First, and most
obviously, we're looking through a blizzard of cosmic radiation
and other spurious signals that we'll soon get rid of. Second,
we're only looking at an image from the PC1 camera; we'll get to
the images from the three WF cameras in a moment. Third, we're
only looking at one of four colors of light that each of the four
cameras records. (Just as a TV makes a color picture by combining
red, green, and blue images, our final color image will combine
images taken through different filters—more on that later.)
Finally, we're only looking at one of 32 different images that go
into producing the final picture. That's because each of the four
cameras takes
two images through each of its four filters. Why the
duplicate pictures? Let me explain.