| 摘要 |
<p>PROBLEM TO BE SOLVED: To attain Hough transformation by small operation quantity and to contribute to high speed operation with respect to a data transformation processing circuit for projecting two-dimensional (2D) data to plural straight lines having respectively different inclinations. SOLUTION: The data transformation processing circuit is provided with circuit parts 21 to 2n for storing 2D data, circuit parts 3 to 6 for successively generating the (x) and (y) coordinates of data to be added in accordance with an angleθand generating signals for selecting data corresponding to these coordinates, circuit parts 71 to 7n , 81 to 8n for selecting data to be added from the stored data based on control signals, and circuit parts 91 to 9n , 101 to 10n for adding the selected data. In the case of executing coordinate generation and data selection, operation based on AH(ρ,θ)=∫a(ρ.cosθ-t.sinθ,ρ.sinθ+ t.cosθ)dt is executed (provided that (t) is a coordinate value vertical to aρdirection), and for a different angleθ, the operation is time-dividedly executed.</p> |
