Method of encoding embedded data blocks containing occlusions

A method for permitting embedded data blocks to include intentional occlusions, for example human visible/readable information such as logos, within the embedded data block. The method encodes occlusions within data blocks such that the size and location of the occlusions are determinable for reliable decoding. The method includes determining a size and location of an occlusion comprised of one or more occluded areas within a data block, determining a regular polygon shape that encompasses only occluded areas of the occlusion, thereby separating the occlusion into occluded areas within the regular polygon shape and remainder occluded areas, if any, outside the regular polygon shape, directly encoding the regular polygon shape through the use of synchronization lines, and indirectly encoding any remainder occluded areas through error correction.