enhance               package:EBImage               R Documentation

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

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

     Functions to enhance and modify colors in images.

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

       ## S4 method for signature 'Image':
       cgamma(x, level=1, ...)
       ## S4 method for signature 'Image':
       contrast(x, sharpen=TRUE, ...)
       ## S4 method for signature 'Image':
       enhance(x, ...)
       ## S4 method for signature 'Image':
       equalize(x, ...)
       ## S4 method for signature 'Image':
       modulate(x, value=100, ...)

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

       x: An object of 'Image'. 

   level: A numeric for the gamma level. 

 sharpen: A logical specifying whether the contrast should be increased
          ('TRUE') or decreased ('FALSE'). 

   value: A percent change in brightness, saturation, and hue.  The
          default value to keep the values unchanged. 

     ...: Reserved. 

_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.

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

     A transformed image in an object of 'Image'.

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

     Oleg Sklyar, osklyar@ebi.ac.uk, 2006-2007

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

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

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

     ' Image '

