Scanned paper documents frequently exhibit yellowed oxidation, gray scanner toner haze, and binding crease shadows. Background cleaning analyzes pixel luminance across the rendered page canvas and applies an adaptive whitening threshold (typically luminance values > 205), normalizing discolored parchment pixels to pure digital white (`#FFFFFF`). By converting muddy background noise into pure white space while boosting dark text edge contrast, this process drastically improves on-screen readability, reduces printer ink and toner consumption by up to 85%, and optimizes documents for OCR indexing. Essential for legal discovery archives, historical book digitizations, student note cleanup, and scanned receipt archiving.