Scanner generating image file including transparency and visible light information

Abstract

A scanner generating an image file including transparency and visible light information includes: a scanning module scanning a document to generate a first signal and a second signal, wherein the first signal is representative of a composite visible light image of the document and a background element, and the second signal is representative of a transmitting light image transmitting through the document; a processor, which is electrically connected to the scanning module, and generates a final image file having first pixels and second pixels according to the first signal and the second signal, wherein the first pixels and the second pixels are arranged in a rectangular array, the first pixels are representative of a visible light image of the document, the second pixels are representative of a remaining image other than the document, and the second pixels have transmitting light channel values greater than 0%; and an output port being electrically connected to the processor and outputting the final image file to an external device.

Dependencies are inferred from the claim text.