sobel                 package:rimage                 R Documentation

_S_o_b_e_l _f_i_l_t_e_r

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

     This function calculates an image which sobel filter is applied.
     It utilizes a C routine for improving speed.

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

     sobel(img)

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

     img: a matrix representing target image

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

     a matrix representing the image after sobel filter is applied

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

     'sobel.h','sobel.v','imagematrix'

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

       data(logo)
       plot(normalize(sobel(logo)))

