lut_trans

Herror ::lut_trans ( Hobject Image, Hobject *ImageResult, const HTuple &Lut ) HImage HImage::LutTrans ( const HTuple &Lut ) const HImageArray HImageArray::LutTrans ( const HTuple &Lut ) const

Transform an image with a gray-value look-up-table

::lut_trans transforms an image Image by using a gray value look-up-table Lut. This table acts as a transformation function.

Parameters

`Image` (input_object)	(multichannel-)image(-array) `->` Hobject: HImage(Array) ( byte )
Image whose gray values are to be transformed.

`ImageResult` (output_object)	(multichannel-)image(-array) `->` Hobject : HImage(Array)* ( byte )
Transformed image.

`Lut` (input_control)	integer-array `->` HTuple.long
Table containing the transformation.

Example

/* To get the inverse of an image: */
Htuple  lut;
read_image(&Image,"wald1");
creat_tuple(&lut,256);
for (i=0; i<256; i++)
  set_i(lut,255-i,i);
T_lut_trans(Image,&Invers,lut);

Result

The operator ::lut_trans returns the value H_MSG_TRUE if the parameters are correct. Otherwise an exception is raised.

Module

Image filters