8 bit alignment

Status Strong

A poster named gsgs observed that two sides of each foreground layer aligned with 8×8 bit boundaries in the 300 PPI resolution, which is the resolution for the foreground layers. Realizing that the image was likely scanned at 600×600 PPI and then the JPEG was padded to align with 16×16 bits (MCU) in this resolution, you may understand why these become 8×8 bit alignments in the 300 PPI resolution.

The WH Long Form Birth Certificate indeed showed that 2 of its sides aligned with these 8×8 bit boundaries, the other two sides aligned with the inside of the image, in the sense that these lines were touching at least one pixel of the image.