| 摘要 |
<p>PURPOSE:To automatize the detection of the motion of a moving image by loading a linear group filter to an obtained Fourier spectrum and detecting the feature of the motion of data by calculating a peak value from that result. CONSTITUTION:When a white circle 42 is moved on a screen 41 shown by (x) and (y) coordinates while setting velocity Vx for the (x) axis direction component to '1' and setting velocity Vy for the (y) axis direction component to '1', a three-dimensional FET image F (Fx, Fy, Ft) is obtained by executing three-dimensional FET (high-speed Fourier transformation) to the moving image data. In respect to the obtained power spectrum, the Vy is changed from -Ny to Ny, average power spectrum is obtained at every Vy by the linear group filter and the peak of the average power spectrum is calculated. Concerning data on the lane of Fy=0 of the power spectrum, the velocity component Vx in the (x) axis direction of the object is calculated similarly. Further, when there is one peak, it is judged that there is one object, and one velocity component Vx/Vy is obtained.</p> |
