Abstract: A method of steganographic encoding data into an image which encoded data is related to image processing functions that may be used to process the image, the method comprises the steps of providing a dispersed message dimension; providing a grid spacing value; providing an array of object identifiers and associated object locations based on the grid spacing value; embedding an object identifer at a first location into the image; embedding a second object identifier at a second location, wherein the the second location is an integer, non-zero multiple of the grid spacing value.

Abstract: A method of calculating the size of a human face in a digital image, includes the steps of: providing image capture metadata associated with a digital image that includes the image of a human face, the metadata including subject distance, focal length, focal plane resolution; providing a standard face dimension; and calculating the size of a human face at the focal plane using the metadata and the standard face size.