A method includes photographing a first image, where the first image comprises a document. A first area of the document is obscured by a first obstruction. The method further includes determining a location of the first area based on depth data. The method further includes photographing a second image. The method further includes restoring the obstructed information in the first area based on the second image. The method further includes displaying a third image, wherein the third image comprises the document and the first obstruction s removed from the first area of the document.