1. A mobile device comprising: a camera; a distance detection mechanism; a display; one or more processors; one or more memories communicatively coupled to the one or more processors; and an image acquisition application executing on the mobile device, wherein the image acquisition application is configured to: cause a reference image of one or more objects to be displayed, on the display of the mobile device, as a background image in a manner that allows a user of the mobile device to simultaneously view one or more preview images of the one or more objects currently in a field of view of the camera, cause the one or more preview images of the one or more objects currently in a field of view of the camera to be displayed simultaneously with the reference image on the display of the mobile device, cause the distance detection mechanism to detect a current distance between the camera and the one or more objects currently in the field of view of the camera, provide an indication to the user of the mobile device whether the current distance is within a specified amount of a distance at which the reference image was acquired, and in response to a user request to acquire an image, cause the camera to acquire a second image of the one or more objects.