Esempio n. 1
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  /**
   * Set components not covered by OTF to zero. Cleares "spilled" frequency components after Fourier
   * shift.
   *
   * @param vec The vector to multiply with the conj. OTF
   * @param d The pattern direction
   * @param comp The component, band*2 for pos, band*2-1 for neg shift.
   */
  @Deprecated
  public void maskOtf(final Vec2d.Cplx vec, int d, int comp) {

    final int w = vec.vectorWidth(), h = vec.vectorHeight();
    final int b = (comp + 1) / 2; // band from component
    final boolean neg = (comp % 2 == 1); // negative shift
    final SimParam.Dir dir = sp.dir(d);

    if (neg) sp.otf().maskOtf(vec, -dir.px(b), -dir.py(b));
    else sp.otf().maskOtf(vec, dir.px(b), dir.py(b));
  }
Esempio n. 2
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  /**
   * Returns a copy of a per-band, per-direction Wiener denominator. This is used mostly for
   * filtering intermediate results.
   *
   * @param d Direction
   * @param b Band
   * @param wParam Wiener filter parameter
   */
  public Vec2d.Real getIntermediateDenominator(int d, int b, double wParam) {

    // get the otf
    Vec2d.Real ret = Vec2d.createReal(sp, 2);
    addWienerDenominator(ret, d, b, sp.otf().isAttenuate());

    // add the wiener parameter
    final int w = ret.vectorWidth(), h = ret.vectorHeight();
    for (int y = 0; y < h; y++)
      for (int x = 0; x < w; x++) ret.set(x, y, 1 / (ret.get(x, y) + (float) (wParam * wParam)));
    return ret;
  }
Esempio n. 3
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  /**
   * Setup the Wiener filter. This (re)initiates the cached filter values. Has to be called if the
   * OTF or the shift parameters change.
   */
  public void updateCache() {

    Tool.Timer t1 = Tool.getTimer();
    final int w = sp.vectorWidth(), h = sp.vectorHeight();

    t1.start();
    wDenom = Vec2d.createReal(2 * w, 2 * h);
    boolean useAtt = sp.otf().isAttenuate();

    // loop directions, bands
    for (int d = 0; d < sp.nrDir(); d++) {
      for (int b = 0; b < sp.dir(d).nrBand(); b++) {
        addWienerDenominator(wDenom, d, b, useAtt);
      }
    }
    t1.stop();

    Tool.trace("Wiener filter setup complete, took " + t1);
  }
Esempio n. 4
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 /** Create a Wiener filter for the parameters and OTF in 'sp' */
 public WienerFilter(SimParam sp) {
   this.sp = sp;
   if (sp.otf() == null) throw new IllegalArgumentException("No OTF set in SimParam");
   updateCache();
 }