enhance               package:EBImage               R Documentation

_E_n_h_a_n_c_i_n_g _i_m_a_g_e _a_n_d _i_m_a_g_e _c_o_l_o_r_s

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

     Functions to enhance image colours.

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


         cgamma(x, level=1, ...)
         contrast(x, sharpen=TRUE, )
         enhance(x, ...)
         equalize(x, ...)
         modulate(x, value=100, ...)


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


     '_x' An object of 'Image-class'. 

     '_s_h_a_r_p_e_n' A logical specifying whether the contrast should be
          increased ('TRUE') or decreased ('FALSE'). 

     '_v_a_l_u_e' A percent change in brightness, saturation, and hue.  The
          default value to keep the values unchanged.  

     '...' Reserved for future use. 

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

     A transformed image in an object of 'Image-class'.

_D_e_t_a_i_l_s:

     'cgamma' gamma-corrects image. The same image viewed on different 
     devices will have perceptual differences in the way the image's
     intensities  are represented on the screen. Adjust all three
     channels with the level  parameter. Values typically range from
     0.8 to 2.3.

     'contrast' enhances the intensity differences between the lighter
     and  darker elements of the image.

     'enhance' applies a digital filter that improves the quality of a 
     noisy image.

     'equalize' applies a histogram equalization to the image.

     'modulate' lets you control the brightness, saturation, and hue of
      an image. Modulate represents the brightness, saturation, and hue
     as one  parameter.

_A_u_t_h_o_r(_s):

     Copyright (c) 2005-2006 Oleg Sklyar : osklyar@ebi.ac.uk

_R_e_f_e_r_e_n_c_e_s:

     _ImageMagick_: <URL: http://www.imagemagick.org>.

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

     ' Image-class '

