1. A method comprising: capturing images of a document having a surface, wherein the capturing comprises scanning across the document surface in a first scan direction in relation to orientation of the document multiple scan lines respectively illuminated from different illumination angles relative to the document surface, scanning across the document surface in a second scan direction in relation to orientation of the document multiple scan lines respectively illuminated from different illumination angles relative to the document surface, the first and second scan directions being different, and generating the captured images from scan line illumination reflected from the document surface during the scanning of respective ones of the scan lines across the document surface; and detecting defects in the document based on the captured images, wherein the detecting comprises detecting at least one of a crease or a tear in the document; wherein the capturing and the detecting are performed by a scanning apparatus.