A computer-implemented method for processing images of a document is disclosed. The method includes: capturing an image of at least part of a document by a camera of an electronic device, the document having one or more data fields; determining, by the electronic device, one or more data entry items from analyzing the one or more data fields in the image; and displaying, on a display of the electronic device, aim a preview of the document including annotation overlays on the preview, each annotation overlay containing a respective one of the one or more data entry items and being displayed in association with its respective data field in the preview.