Logarithmic polar coordinate transforming method, vision recognizing method, and optical information processing apparatus

摘要

A vision recognizing method includes a logarithmic polar coordinate transforming method including the steps of storing an input image f1(x, y); optically generating complex amplitude information f1(x, y)A(x, y)T(x, y) by multiplying the information of the input image by the product of phase information A(x, y) for performing a logarithmic polar coordinate transformation and amplitude information T(x, y), an amplitude of which changes according to distance between each point composing the amplitude information and origin of logarithmic polar coordinate; and Fourier-transforming the complex amplitude information f1(x, y)A(x, y)T(x, y). An optical information processing apparatus is used to carry out the method and includes a combination of lenses and liquid crystal displays.