The data item representing the first line of the image block is not shifted at all, and the data items representing {HEAD ~ the following lines} of {TAIL ~ the image block} are shifted by the distance proportional to the angle, by twice said distance, by thrice said distance, and so on 
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The data item representing the first line of the image block is not shifted at all , and the data items representing { HEAD ~ the following lines } of { TAIL ~ the image block } are shifted by the distance proportional to the angle , by twice said distance , by thrice said distance , and so on
OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH