Exemple #1
0
  /**
   * Returns the maximum number of magnitude bits in any subband of the current tile if reversible
   * quantization is used
   *
   * @param sb The root of the subband tree of the current tile
   * @param c the component number
   * @return The highest number of magnitude bit-planes
   */
  private int getMaxMagBitsRev(Subband sb, int c) {
    int tmp, max = 0;
    int g = ((Integer) gbs.getTileCompVal(tIdx, c)).intValue();

    if (!sb.isNode) return g - 1 + src.getNomRangeBits(c) + sb.anGainExp;

    max = getMaxMagBitsRev(sb.getLL(), c);
    tmp = getMaxMagBitsRev(sb.getLH(), c);
    if (tmp > max) max = tmp;
    tmp = getMaxMagBitsRev(sb.getHL(), c);
    if (tmp > max) max = tmp;
    tmp = getMaxMagBitsRev(sb.getHH(), c);
    if (tmp > max) max = tmp;

    return max;
  }
Exemple #2
0
  /**
   * Returns the maximum number of magnitude bits in any subband in the given tile-component if
   * derived quantization is used
   *
   * @param sb The root of the subband tree of the tile-component
   * @param t Tile index
   * @param c Component index
   * @return The highest number of magnitude bit-planes
   */
  private int getMaxMagBitsDerived(Subband sb, int t, int c) {
    int tmp, max = 0;
    int g = ((Integer) gbs.getTileCompVal(t, c)).intValue();

    if (!sb.isNode) {
      float baseStep = ((Float) qsss.getTileCompVal(t, c)).floatValue();
      return g - 1 + sb.level - (int) Math.floor(Math.log(baseStep) / log2);
    }

    max = getMaxMagBitsDerived(sb.getLL(), t, c);
    tmp = getMaxMagBitsDerived(sb.getLH(), t, c);
    if (tmp > max) max = tmp;
    tmp = getMaxMagBitsDerived(sb.getHL(), t, c);
    if (tmp > max) max = tmp;
    tmp = getMaxMagBitsDerived(sb.getHH(), t, c);
    if (tmp > max) max = tmp;

    return max;
  }
Exemple #3
0
  /**
   * Returns the maximum number of magnitude bits in any subband in the given tile-component if
   * expounded quantization is used
   *
   * @param sb The root of the subband tree of the tile-component
   * @param t Tile index
   * @param c Component index
   * @return The highest number of magnitude bit-planes
   */
  private int getMaxMagBitsExpounded(Subband sb, int t, int c) {
    int tmp, max = 0;
    int g = ((Integer) gbs.getTileCompVal(t, c)).intValue();

    if (!sb.isNode) {
      float baseStep = ((Float) qsss.getTileCompVal(t, c)).floatValue();
      return g
          - 1
          - (int)
              Math.floor(
                  Math.log(baseStep / (((SubbandAn) sb).l2Norm * (1 << sb.anGainExp))) / log2);
    }

    max = getMaxMagBitsExpounded(sb.getLL(), t, c);
    tmp = getMaxMagBitsExpounded(sb.getLH(), t, c);
    if (tmp > max) max = tmp;
    tmp = getMaxMagBitsExpounded(sb.getHL(), t, c);
    if (tmp > max) max = tmp;
    tmp = getMaxMagBitsExpounded(sb.getHH(), t, c);
    if (tmp > max) max = tmp;

    return max;
  }