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< > BotCompany Repo | #1033569 // TruncatedIBWIntegralImage [forget sub-pixels]

JavaX fragment (include) [tags: use-pretranspiled]

Libraryless. Click here for Pure Java version (11576L/68K).

// forgets sub-pixels
// nearest neighbor, basically
// TODO: fix?
sclass TruncatedIBWIntegralImage > Meta is IBWIntegralImage {
  IBWIntegralImage img;
  int w, h;

  *(IBWIntegralImage *img) {
    w = img.getWidth();
    h = img.getHeight();
  }
    
  public int getWidth() { ret w; }
  public int getHeight() { ret h; }
    
  // normal range [0; pixelCount*256)
  public double getIIValue(dbl x, dbl y) {
    int xFloor = ifloor(x), yFloor = ifloor(y);
    
    // get value at top left corner of pixel
    double val = img.getIIValue(xFloor, yFloor);
    
    // at integer coordinate? done
    if (xFloor == x && yFloor == y)
      ret val;
      
    double xFrac = x-xFloor, yFrac = y-yFloor;
    
    // at non-integer coordinate, perform subpixel calculation
    double area = xFrac*yFrac;
    double pixelColor = img.getPixelBrightness(xFloor+1, yFloor+1);
    
    ret val+area*pixelColor;
  }
}

Author comment

Began life as a copy of #1033566

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Travelled to 4 computer(s): bhatertpkbcr, ekrmjmnbrukm, mowyntqkapby, mqqgnosmbjvj

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Snippet ID: #1033569
Snippet name: TruncatedIBWIntegralImage [forget sub-pixels]
Eternal ID of this version: #1033569/11
Text MD5: 1e9a0ed0fa951c9cbc45f0ea582a525f
Transpilation MD5: b71a7af2293b9166b66321c519350fb1
Author: stefan
Category: javax / imaging
Type: JavaX fragment (include)
Public (visible to everyone): Yes
Archived (hidden from active list): No
Created/modified: 2022-01-05 02:03:01
Source code size: 942 bytes / 35 lines
Pitched / IR pitched: No / No
Views / Downloads: 46 / 97
Version history: 10 change(s)
Referenced in: [show references]