source: branches/pixel-map-branch/src/Cubes/trimImage.cc

#include <iostream>
#include <param.hh>
#include <Cubes/cubes.hh>
#include <PixelMap/Object3D.hh>

using namespace PixelInfo;

void Cube::trimCube()
{
  /**
   *  If the blankPix flag has been set, this routine trims excess blank 
   *    pixels from the edges of the spatial image.
   *   It uses as its template the first channel, assuming that its non-BLANK 
   *    size is representative of the rest of the channels.
   *   The edges are moved in until the first non-BLANK pixel is encountered.
   *   All other arrays are similarly edited, and the amount of trimming is 
   *    recorded.
   */

  if(this->par.getFlagBlankPix()) {

    long xdim = this->axisDim[0];
    long ydim = this->axisDim[1];
    long zdim = this->axisDim[2];
    const long ZCHAN = 0;

    int left,right,top,bottom;

    for(int z = 0; z < zdim; z++){

      for(int row=0;row<ydim;row++){
        left=0;
        right=0;
        while((left<xdim)&&
              (this->par.isBlank(this->array[row*xdim+left+ZCHAN*xdim*ydim])) ) {
          left++;
        }
        while((right<xdim)&&
              (this->par.isBlank(this->array[row*xdim+(xdim-1-right)+ZCHAN*xdim*ydim]))){
          right++;
        }

        if( ((z==0)&&(row==0)) || (left < this->par.getBorderLeft()) ) 
          this->par.setBorderLeft(left);
        if( ((z==0)&&(row==0)) || (right < this->par.getBorderRight()) ) 
          this->par.setBorderRight(right);

      }
    
      for(int col=0;col<xdim;col++){
        bottom=0;
        top=0;
        while((bottom<ydim)&&
              (this->par.isBlank(this->array[col+bottom*xdim+ZCHAN*xdim*ydim])) ) bottom++;

        while((top<ydim)&&
              (this->par.isBlank(this->array[col+(ydim-1-top)*xdim+ZCHAN*xdim*ydim])) ) top++;

        if( ((z==0)&&(col==0)) || (bottom < this->par.getBorderBottom()) ) 
          this->par.setBorderBottom(bottom);
        if( ((z==0)&&(col==0)) || (top < this->par.getBorderTop()) ) 
          this->par.setBorderTop(top);

      }

    }
    
    left = this->par.getBorderLeft();
    right = this->par.getBorderRight();
    top = this->par.getBorderTop();
    bottom = this->par.getBorderBottom();

    this->axisDim[0] = xdim - left - right; 
    this->axisDim[1] = ydim - bottom - top; 
    this->axisDim[2] = zdim;
    this->numPixels = this->axisDim[0]*this->axisDim[1]*this->axisDim[2];

    long oldpos,newpos;
    
    // Do the trimming, but only if we need to -- is there a border of Blanks?
    if((left>0)||(right>0)||(bottom>0)||(top>0)) {

      // Trim the array of pixel values
      float *newarray  = new float[this->numPixels];
      for(int x = 0; x < axisDim[0]; x++){
        for(int y = 0; y < axisDim[1]; y++){
          for(int z = 0; z < axisDim[2]; z++){ 
            oldpos = (x+left) + (y+bottom)*xdim + z*xdim*ydim;
            newpos = x + y*axisDim[0] + z*axisDim[0]*axisDim[1];
            newarray[newpos]  = this->array[oldpos];
          }
        }
      }
      delete [] this->array;
      this->array = newarray;

      // Trim the 2-D detection map
      short *newdetect = new short[this->axisDim[0]*this->axisDim[1]];
      for(int x = 0; x < axisDim[0]; x++){
        for(int y = 0; y < axisDim[1]; y++){
          oldpos = (x+left) + (y+bottom)*xdim;
          newpos = x + y*axisDim[0];
          newdetect[newpos] = this->detectMap[oldpos];
        }
      }
      delete [] this->detectMap;
      this->detectMap = newdetect;

      if(this->par.getFlagATrous()){
        // Trim the reconstructed array if we are going to do the
        // reconstruction
        float *newrecon  = new float[this->numPixels];
        for(int x = 0; x < axisDim[0]; x++){
          for(int y = 0; y < axisDim[1]; y++){
            for(int z = 0; z < axisDim[2]; z++){ 
              oldpos = (x+left) + (y+bottom)*xdim + z*xdim*ydim;
              newpos = x + y*axisDim[0] + z*axisDim[0]*axisDim[1];
              newrecon[newpos] = this->recon[oldpos];     
            }
          }
        }
        delete [] this->recon;
        this->recon = newrecon;
      }

      // Set the flag indicating trimming has taken place only if it has.
      this->par.setFlagCubeTrimmed(true);

    }

  }

}


void Cube::unTrimCube()
{
  /**
   *  If the cube has been trimmed by trimCube(), this task adds back the 
   *   BLANK pixels on the edges, so that it returns to its original size.
   *   All arrays are similarly edited.
   */

  if(this->par.getFlagCubeTrimmed()){

    long left = this->par.getBorderLeft();
    long right = this->par.getBorderRight();
    long top = this->par.getBorderTop();
    long bottom = this->par.getBorderBottom();

    long smallXDim = this->axisDim[0];
    long smallYDim = this->axisDim[1];
    long smallZDim = this->axisDim[2];

    // first correct the dimension sizes 
    this->axisDim[0] = smallXDim + left + right; 
    this->axisDim[1] = smallYDim + bottom + top; 
    this->axisDim[2] = smallZDim;
    this->numPixels = this->axisDim[0]*this->axisDim[1]*this->axisDim[2];

    long pos,smlpos;
    bool isDud;

    // Correct the array of pixel values
    float *newarray  = new float[this->numPixels];
    for(int x = 0; x < this->axisDim[0]; x++){
      for(int y = 0; y < this->axisDim[1]; y++){
        isDud = (x<left) || (x>=smallXDim+left) || 
          (y<bottom) || (y>=smallYDim+bottom);
        
        for(int z = 0; z < this->axisDim[2]; z++){ 
          pos = x + y*this->axisDim[0] + z*this->axisDim[0]*this->axisDim[1];
          smlpos = (x-left) + (y-bottom)*smallXDim + z * smallXDim * smallYDim;
          if(isDud) newarray[pos] = this->par.getBlankPixVal();
          else      newarray[pos] = this->array[smlpos];
        }
      }
    }
    delete [] this->array;
    this->array = newarray;

    if(this->reconExists){
      // Correct the reconstructed array
      float *newrecon   = new float[this->numPixels];
      for(int x = 0; x < this->axisDim[0]; x++){
        for(int y = 0; y < this->axisDim[1]; y++){
          isDud = (x<left) || (x>=smallXDim+left) || 
            (y<bottom) || (y>=smallYDim+bottom);
          
          for(int z = 0; z < this->axisDim[2]; z++){ 
            pos = x + y*this->axisDim[0] + z*this->axisDim[0]*this->axisDim[1];
            smlpos = (x-left) + (y-bottom)*smallXDim
              + z * smallXDim * smallYDim;
            if(isDud) newrecon[pos] = this->par.getBlankPixVal();
            else      newrecon[pos] = this->recon[smlpos];
          }
        }
      }
      delete [] this->recon;
      this->recon = newrecon;
    }

    // Correct the 2-D detection map
    short *newdetect = new short[this->axisDim[0]*this->axisDim[1]];
    for(int x = 0; x < this->axisDim[0]; x++){
      for(int y = 0; y < this->axisDim[1]; y++){
        pos = x + y*this->axisDim[0];
        smlpos = (x-left) + (y-bottom)*smallXDim;
        isDud = (x<left) || (x>=smallXDim+left) || 
          (y<bottom) || (y>=smallYDim+bottom);
        if(isDud) newdetect[pos]=0;
        else newdetect[pos] = this->detectMap[smlpos];
      }
    }
    delete [] this->detectMap;
    this->detectMap = newdetect;    

  
    // Now update the positions for all the detections
  
    for(int i=0;i<this->objectList.size();i++){
      this->objectList[i].pixels().addOffsets(left,bottom,0);
      //      objectList[i].calcParams(this->array,this->axisDim);
    }

  }

}