| 摘要 |
<p>PURPOSE:To enable pixels to indicate uniform information over the entire screen plotted in the rectangular coordinate, by uniformizing the amount of information, dense and sparse, held by pixels in the central and peripheral areas of the screen plotted in the polar coordinate. CONSTITUTION:An input signal (c) of polar coordinate indication is inputted into a coefficient device 1 and is multiplied by a prescribed weight coefficient by a coefficient selection signal (d) corresponding to the divided zone to which the polar coordinate position belongs to produce weight information. Then, this weight information is inputted into an adder 2 while corresponding information is read out from a rectangular coordinate-based indication memory 3 by a reading signal (f) to be inputted into the adder 2. Then, the operation of writing the sum of both input information into a corresponding address according to a writing signal (e) is cumulatively added up times corresponding to the reciprocal of the weight coefficient and the results are wrotten as information data. This operation is executes sequentially and finally, information with the uniformized weight is memorized into the rectangular coordinate-based indication memory 3.</p> |
