1. A method for detecting a document, the method comprising: capturing a first plurality of images of a document at a first wavelength of electromagnetic radiation; capturing a second plurality of images of the document at a second wavelength of electromagnetic radiation; and assembling the first and second pluralities of images to form one or more images of the document, wherein the first plurality of images is a first plurality of line images, and wherein the second plurality of images is a second plurality of line images, and wherein at least a portion of the captured line images are substantially perpendicular to a direction of travel of the document.