highpass               package:rimage               R Documentation

_H_i_g_h _p_a_s_s _f_i_l_t_e_r _f_o_r _i_m_a_g_e

_D_e_s_c_r_i_p_t_i_o_n:

     Computes a high-pass filtered image with dimensions of the given
     input image. the hp pasing distance is given via radius.

_U_s_a_g_e:

     highpass(img,radius)

_A_r_g_u_m_e_n_t_s:

     img: pixmap or image

  radius: gives the blocking radius

_V_a_l_u_e:

     an imagematrix

_S_e_e _A_l_s_o:

     'lowpass'

_E_x_a_m_p_l_e_s:

       data(logo)
       plot(normalize(highpass(logo)))

