Patent ID: 8086051

Claim:
A method of decoding a fetched scene on an encoded dotmap, comprising: determining a center physical grid dot located in an intersection of a first virtual grid line and a second virtual grid line, wherein both the first virtual grid line and the second virtual grid line have at least one collinear set having three immediately-adjacent physical grid dots, which are spaced with a same distance on the first virtual grid line or on the second virtual grid line; recognizing each physical grid dot aligned in the first virtual grid line and the second virtual grid line; defining a blank dot on the first virtual grid line, wherein the blank dot is located in the middle of the center physical grid dot and an immediately-adjacent physical grid dot having a distance twice than any other two immediately-adjacent physical grid dots in the first virtual grid line; stretching a plurality of virtual lines parallel to the first virtual grid line on each physical grid dot on the second virtual grid line; stretching the plurality of virtual lines parallel to the second virtual grid line on each physical grid dot and the blank dot on the first virtual grid line; determining intersects of the generated plurality of virtual lines on the fetched scene; and decoding each data dot on the fetched scene based on positional relation thereof with a closest one of the intersects of the plurality of virtual lines and the location of the blank dot.