write_lut

Herror ::write_lut ( const HTuple &WindowHandle, const HTuple &FileName ) void HWindow::WriteLut ( const HTuple &FileName ) const

Write look-up-table (lut) as file.

::write_lut saves the look-up-table (resp. the part of it that is relevant for displaying image gray values) of the valid output window into a file named 'FileName.lut'. It can be read again later with ::set_lut.

Attention

::write_lut is only suitable for systems using 256 colors.

Parameters

`WindowHandle` (input_control)	window `->` HTuple.long
Window identifier.

`FileName` (input_control)	filename `->` HTuple.char *
File name (of file containing the look-up-table).
Default value: '/tmp/lut'

Example

read_image(&Image,"affe") ;
disp_image(Image,WindowHandle) ;
draw_lut(WindowHandle) ;
write_lut(WindowHandle,"test_lut") ;

Result

::disp_lut returns H_MSG_TRUE if the window with the demanded properties (256 colors) is valid and the parameter (file-name) is correct. It returns H_MSG_FAIL if the specified file can't be opened. Otherwise an exception handling is raised.

Possible Predecessors

::draw_lut, ::set_lut

Module

System