ll_sharp.c

image processing including fourier,wavelet,segmentation etc.

/*----------------------------- MegaWave Module -----------------------------*/
/* mwcommand 
  name = {ll_sharp}; 
  version = {"1.4"}; 
  author = {"Pascal Monasse, Frederic Guichard"}; 
  function = {"Sharpen an image (select some of the parallel level lines)"}; 
  usage = { 
    'p': [percent_area=20]-> pPercentIncreaseArea [1,1000] "% area change to glue parent and child (default: 20)", 
    image_in -> pFloatImageInput  "Input fimage", 
    image_out <- pFloatImageOutput "Output fimage" 
    }; 
*/ 
/*----------------------------------------------------------------------
 v1.2: Flist adaptation in remove_gradation (L.Moisan)
 v1.3: upgrade for new kernel (L.Moisan)
 v1.4: fixed size problem (L.Moisan)
----------------------------------------------------------------------*/

#include "mw.h" 

extern void flst();
extern void flst_reconstruct();

 
/* An elementary shape is a shape having a child of a different type. To keep consistency 
   between the tree and the associated image, it is forbidden to remove such a shape. This 
   function detects if pShape is an elementary shape, and if the answer is positive, mark 
   the shape to be its own gradation. */ 
void keep_elementary_shape(pShape) 
Shape pShape; 
{ 
  Shape pChild; 
   
  /* If one of the sons is of different type, the object has only one shape */ 
  for(pChild = mw_get_first_child_shape(pShape); pChild != NULL; pChild = mw_get_next_sibling_shape(pChild)) 
    if(pChild->inferior_type != pShape->inferior_type) 
      break; 
 
  if(pChild != NULL) 
    pShape->data = (char*)1; 
} 
 
/* Find the gradation containg pShape, remove it but keep only one representative shape of 
   the gradation. 
   A gradation is defined to be a family of shapes such that: 
   One shape S and its child C are in the same gradation iff: 
   - C is the only child of S; 
   - C and S have the same type; 
   - the areas of C and S do not differ by a factor greater than fFactorIncreaseArea; 
   - C is not an elementary shape. 
   It is not hard to see that this relation induces a partition of the family of shapes, each 
   class of the partition is then called a gradation. 
   The representative shape of the gradation is the shape of the gradation with smallest L