autoindex
      Arguments:
      
        - nb_colors>0,0<=_dithering<=1,_method={ 0:Median-cut | 1:K-means }
 
      
      Description:
Index selected vector-valued images by adapted colormaps.
Default values:
dithering=0 and method=1.
      Example of use:
       <a href="image.jpg" class="highslide" onclick="return hs.expand(this)">image.jpg</a> +autoindex[0] 4 +autoindex[0] 8 +autoindex[0] 16
                
Command: <a href="image.jpg" class="highslide" onclick="return hs.expand(this)">image.jpg</a> +autoindex[0] 4 +autoindex[0] 8 +autoindex[0] 16
        
Command: <a href="image.jpg" class="highslide" onclick="return hs.expand(this)">image.jpg</a> +autoindex[0] 4 +autoindex[0] 8 +autoindex[0] 16
        
Command: <a href="image.jpg" class="highslide" onclick="return hs.expand(this)">image.jpg</a> +autoindex[0] 4 +autoindex[0] 8 +autoindex[0] 16
        
Command: <a href="image.jpg" class="highslide" onclick="return hs.expand(this)">image.jpg</a> +autoindex[0] 4 +autoindex[0] 8 +autoindex[0] 16