ipSegmentationReplaceRegion.cpp File Reference

#include <queue>
#include "ipSegmentation.h"

Go to the source code of this file.

Functions
int	ipMITKSegmentationReplaceRegion4N (mitkIpPicDescriptor *seg, int startOfs, mitkIpInt1_t newValue)

---

Function Documentation

int ipMITKSegmentationReplaceRegion4N	(	mitkIpPicDescriptor *	seg,
		int	startOfs,
		mitkIpInt1_t	newValue
	)

Replaces the 4 neighbourhood region around startOfs (y*picWidth+x) of the 2D segmented image seg with newValue. Seg has to be an 8-bit datatype, e.g. mitkIpUInt1_t. Returns the number of replaced pixels. If newValue is the same as the old value, the function returns 0.

Definition at line 22 of file ipSegmentationReplaceRegion.cpp.

References int(), ipMITKSegmentationUndoIsEnabled(), ipMITKSegmentationUndoSave(), and tagSEGMENTATION_EMPTY.

Referenced by mitk::CorrectorAlgorithm::modifySegment(), and mitk::RegionGrowingTool::PerformRegionGrowingAndUpdateContour().

{
  mitkIpPicTSV_t* tag;

  std::queue<int> ofsQueue;

  if (ipMITKSegmentationUndoIsEnabled (seg)) {
    ipMITKSegmentationUndoSave (seg);
  }
  tag = mitkIpPicDelTag (seg, tagSEGMENTATION_EMPTY);
  if (tag) {
    mitkIpPicFreeTag (tag);
  }

  if (seg->bpe != 8) return 0;

  int line = seg->n[0];
  int maxOfs = (int)(line * seg->n[1]);
  int testOfs;
  mitkIpInt1_t replaceMe = *((mitkIpInt1_t*)seg->data + startOfs);
  if (replaceMe == newValue) return 0;
  
  mitkIpInt1_t segVal;
  ofsQueue.push( startOfs );
  *((mitkIpInt1_t*)seg->data+startOfs) = newValue;
  int regionSize = 0;

  while (!ofsQueue.empty()) {
    int nextOfs = ofsQueue.front();
    ofsQueue.pop();
    regionSize++;
    // check right:
    testOfs = nextOfs+1;
    if (testOfs%line!=0) {
      segVal = *((mitkIpInt1_t*)seg->data+testOfs);
      if ( segVal == replaceMe ) {
        ofsQueue.push( testOfs );
        *((mitkIpInt1_t*)seg->data+testOfs) = newValue;
      }
    }
    // check top:
    testOfs = nextOfs-line;
    if (testOfs >= 0) {
      segVal = *((mitkIpInt1_t*)seg->data+testOfs);
      if ( segVal == replaceMe ) {
        ofsQueue.push( testOfs );
        *((mitkIpInt1_t*)seg->data+testOfs) = newValue;
      }
    }
    // check left:
    testOfs = nextOfs-1;
    if (nextOfs%line!=0) {
      segVal = *((mitkIpInt1_t*)seg->data+testOfs);
      if ( segVal == replaceMe ) {
        ofsQueue.push( testOfs );
        *((mitkIpInt1_t*)seg->data+testOfs) = newValue;
      }
    }
    // check bottom:
    testOfs = nextOfs+line;
    if (testOfs < maxOfs) {
      segVal = *((mitkIpInt1_t*)seg->data+testOfs);
      if ( segVal == replaceMe ) {
        ofsQueue.push( testOfs );
        *((mitkIpInt1_t*)seg->data+testOfs) = newValue;
      }
    }
  }
  return regionSize;
}