sip_colormap

SIP Toolbox

sip_colormap - creates a beautiful colormap

Calling Sequence

[map,map_number] = sip_colormap(colormap_name_or_number [,number_of_colors])

Input Parameters

colormap_name_or_number : can be either a string or a number
number_of_colors: the number of rows in the colormap.
Default is 256 (8 bits).

If this number is negative, then the function will return the complimentary colormap.

Output Parameters

map: a colormap of size number of colors.
map_number: the number of the colormap (for quick access).

Description

sip_colormap(colormap_number,[number_of_colors]) returns one the predefined colormaps.

sip_colormap() shows the available names.

These colormaps were created by Enrico Segre and are from the ENRICO toolbox. Have a look at this toolbox if you want to improve Scilab displays.

Examples

   image=imread(SIPDIR+'images/photonics/laser1.jpg');
   //reads an indexed image
   map=sip_colormap(10,256); //takes the colormap number 19
   //it's the same as: map=sip_colormap('sunrise',256);
   xbasc();imshow(image,map);
   //display in false colors

   //For 3D plots, with the map number 16 ('prism')
   xset("window",1);xset("colormap",sip_colormap(16,256));
   [r,c]=size(image);
   plot3d1(1:4:r,1:4:c,image(1:4:r,1:4:c))

   //You can have the complimentary colormap with
   comp_map=abs(1-map);
   xbasc();imshow(image,comp_map);
   //or simply:comp_map=sip_coloramp(16,-256)

   //To reverse the color order:
   invmap(256:-1:1,1:3)=sip_colormap(7,256);

   //To display a colormap:
   map1=ones(1:100)'*(256:-1:1);           
   xbasc();imshow(map1',sip_colormap(4))   
   //will display the colormap number 4 in 256 colors

Authors

The original colormaps were created and named by Enrico Segre.