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To: Doofer
Note the absence of chromatic aberration. The Obama White House document is not an unaltered color scan

So what does that mean?

35 posted on 04/30/2011 9:03:47 PM PDT by Jim W N
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To: Jim 0216

Means it was constructed electronically.

The blurry “I was” that’s been posted is what a scan looks like.

The zoomed text from the BC is purported to be originally from a black and white image and overlaid on the green back ground. This is why the letters are so solid black (The way I understand this at least.)

I’m no expert either, but getting my crash course.


52 posted on 04/30/2011 9:25:27 PM PDT by CommieCutter (Promote Liberal Extinction: Support gay marriage and abortion!)
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To: Jim 0216
I had the same question, I think. If I think correctly this may help, it helped me to understand. I think I do.

"Folks, this is physics. It is 'how things work.' It is why you see rainbows. Light always is refracted slightly differently depending on wavelength when it goes through a lens - as is necessary to focus it so as to make an image."

To make a copy (or scans in this case) using one of them machines the image of the document passes through a lens -- producing a copy from a computer file simply prints pixels.

There are several illustrations in these replies.

71 posted on 04/30/2011 9:50:50 PM PDT by WilliamofCarmichael (If modern America's Man on Horseback is out there, Get on the damn horse already!)
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To: Jim 0216
So what does that mean?

The document was created on a computer, not scanned off a paper copy that Obama supposedly got from Hawaii. If you watch Denniger's video, you'll see that he talks about chromatic aberration, which is a red/orange color on one side of text and a blue color on the other side that is created whenever a document is scanned. You have to increase the magnification to about 800% to see it. The document on the WH website did not have any of this aberration, which means it was never scanned. Here is something I wrote on another thread:

I’ve personally increased the magnification on a document I knew was generated on a computer. No chromatic aberration present. Then I printed the document, ran it through a color scanner and increased the magnification on the resulting PDF. Chromatic aberration was present. The lack of chromatic aberration on the PDF posted on the WH website tells me (an amateur) it was never a paper document that was scanned, but rather a document that was created on the computer. Given that supposition, the OCR layer argument doesn’t hold water with me. If anyone more knowlegdable than me can tell me how to clean up chromatic aberration after a scan then I will be happy to re-evaluate my opinion. Until then, I think it’s a hoax.

97 posted on 04/30/2011 10:17:34 PM PDT by Jess79
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