1. A portable digital camera device comprising: a digital camera unit comprising a first image sensor for capturing images and a color display for displaying captured images to a user; and an integral processor configured for: controlling operation of the first image sensor and color display; decoding an imaged coding pattern printed on a substrate, said printed coding pattern employing Reed-Solomon encoding; and performing an action in said handheld digital camera device based on the decoded coding pattern, wherein said decoding comprises the steps of: detecting target structures defining an extent of a data area; determining the data area using the detected target structures; and Reed-Solomon decoding the coding pattern contained in the determined data area, wherein the action performed in said device is an image-warping effect.