Here it is. I can detect lines covered in noise in a few ten millisecond               
                          X-Y Space                                                         Theta Row Space

Hough Transform is a powerful method to find out lines on a figure covered in much noise. The original HT is composed of many calculations with Sinusoidal Function. But it is converted to quadruple recurrence formula without calculation of sinusoidal function, moreover, replacing multiplication with very simple shift operation of binary system, the detection of a line above is performed in a few ten millisecond using a conventional personal computer. Now, do you believe there are 3 lines on the figure below.