[DiogenesLamp]

The second R is affected by the fold of the paper, while the first one is not. Like, duh.

Well enough. Please explain what happened to this "R". Tell me why the pixel size and bit depth changed from one character to the next.

[Kleon]

Tell me why the pixel size and bit depth changed from one character to the next.

Because some characters were scanned as the lower-res background layer and not the enhanced text. The most likely reason for this is that the letter was faded and wasn't detected by the scanner.