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Re: I Camera Flatness
I thought to look at one more thing. Looking at a small box near the center
of the image I got:
Mean 186, sigma 29
At the corner:
Mean -309, sigma 28.3
So the sigma in a small box is comparable to the sigma over the whole
image. To me, this means that the noise is swamping the variations due to
the optics. At least it is of comparable magnitude.
When I look, I notice that most of the image is pretty close to the mean.
There is a high point at the middle, and low points at the corners, but
most of the image is average. I think this is what Elliot tried to do.
At 02:05 PM 3/29/01 -0600, you wrote:
Michael has replied to my comments about the flatness of the lenses. This
has prompted a little work.
First, I want you all to recall how the lenses were designed. In
discussions with Elliot, we chose to optimize the lenses in a circle
tangent to the sides of the 2048x2048 square. That is, the corners were
left out of the