Thanks for your reply. I had looked at a different AiW. But my comments stand. You are looking at obviously enhanced text, which is solid black, and drawings which are greyscale. I doubt the original image was printed with different inks. Google has manipulated the original image to make it searchable and more readable, probably with software they developed themselves.
My example of multiple pixelation involves no text. I ask you again to find me an example in one of the drawings or some other place where things which are obviously not text exhibit multiple pixelation.
ML/NJ
Sure, no problem. You can see this effect more clearly in another version of Alice's Adventures in Wonderland.
In particular, take a look at page 89 of the PDF. As you can see, the bottom portion of the illustration is enhanced while the rest of picture shows a different pixelization.
What's happening here is that the scanning software draws a box around the elements that will be enhanced or not. Since it's not perfect, parts will be left off, and it doesn't matter if it's a picture, text or signature. If the software doesn't recognize an element, it won't get changed. That's why some elements in Obama's certificate look different when blown up.
