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 '

