javax.imageio.plugins.jpeg.JPEGQTable Java Examples

The following examples show how to use javax.imageio.plugins.jpeg.JPEGQTable. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.

Example #1

Source File: JPEGImageWriter.java From Bytecoder with Apache License 2.0

6 votes

/**
 * Finds all DQT marker segments and returns all the q
 * tables as a single array of JPEGQTables.
 */
private JPEGQTable [] collectQTablesFromMetadata
    (JPEGMetadata metadata) {
    ArrayList<DQTMarkerSegment.Qtable> tables = new ArrayList<>();
    Iterator<MarkerSegment> iter = metadata.markerSequence.iterator();
    while (iter.hasNext()) {
        MarkerSegment seg = iter.next();
        if (seg instanceof DQTMarkerSegment) {
            DQTMarkerSegment dqt =
                (DQTMarkerSegment) seg;
            tables.addAll(dqt.tables);
        }
    }
    JPEGQTable [] retval = null;
    if (tables.size() != 0) {
        retval = new JPEGQTable[tables.size()];
        for (int i = 0; i < retval.length; i++) {
            retval[i] =
                new JPEGQTable(tables.get(i).data);
        }
    }
    return retval;
}

Example #2

Source File: JPEGImageWriter.java From openjdk-jdk8u-backup with GNU General Public License v2.0

6 votes

/**
 * Finds all DQT marker segments and returns all the q
 * tables as a single array of JPEGQTables.
 */
private JPEGQTable [] collectQTablesFromMetadata
    (JPEGMetadata metadata) {
    ArrayList tables = new ArrayList();
    Iterator iter = metadata.markerSequence.iterator();
    while (iter.hasNext()) {
        MarkerSegment seg = (MarkerSegment) iter.next();
        if (seg instanceof DQTMarkerSegment) {
            DQTMarkerSegment dqt =
                (DQTMarkerSegment) seg;
            tables.addAll(dqt.tables);
        }
    }
    JPEGQTable [] retval = null;
    if (tables.size() != 0) {
        retval = new JPEGQTable[tables.size()];
        for (int i = 0; i < retval.length; i++) {
            retval[i] =
                new JPEGQTable(((DQTMarkerSegment.Qtable)tables.get(i)).data);
        }
    }
    return retval;
}

Example #3

Source File: DQTMarkerSegment.java From jdk1.8-source-analysis with Apache License 2.0

6 votes

void print() {
    System.out.println("Table id: " + Integer.toString(tableID));
    System.out.println("Element precision: "
                       + Integer.toString(elementPrecision));

    (new JPEGQTable(data)).toString();
    /*
      for (int i = 0; i < 64; i++) {
      if (i % 8 == 0) {
      System.out.println();
      }
      System.out.print(" " + Integer.toString(data[i]));
      }
      System.out.println();
    */
}

Example #4

Source File: DQTMarkerSegment.java From dragonwell8_jdk with GNU General Public License v2.0

6 votes

Qtable(boolean wantLuma, float quality) {
    elementPrecision = 0;
    JPEGQTable base = null;
    if (wantLuma) {
        tableID = 0;
        base = JPEGQTable.K1Div2Luminance;
    } else {
        tableID = 1;
        base = JPEGQTable.K2Div2Chrominance;
    }
    if (quality != JPEG.DEFAULT_QUALITY) {
        quality = JPEG.convertToLinearQuality(quality);
        if (wantLuma) {
            base = JPEGQTable.K1Luminance.getScaledInstance
                (quality, true);
        } else {
            base = JPEGQTable.K2Div2Chrominance.getScaledInstance
                (quality, true);
        }
    }
    data = base.getTable();
}

Example #5

Source File: DQTMarkerSegment.java From jdk1.8-source-analysis with Apache License 2.0

6 votes

Qtable(boolean wantLuma, float quality) {
    elementPrecision = 0;
    JPEGQTable base = null;
    if (wantLuma) {
        tableID = 0;
        base = JPEGQTable.K1Div2Luminance;
    } else {
        tableID = 1;
        base = JPEGQTable.K2Div2Chrominance;
    }
    if (quality != JPEG.DEFAULT_QUALITY) {
        quality = JPEG.convertToLinearQuality(quality);
        if (wantLuma) {
            base = JPEGQTable.K1Luminance.getScaledInstance
                (quality, true);
        } else {
            base = JPEGQTable.K2Div2Chrominance.getScaledInstance
                (quality, true);
        }
    }
    data = base.getTable();
}

Example #6

Source File: JPEGImageWriter.java From jdk1.8-source-analysis with Apache License 2.0

6 votes

/**
 * Returns <code>true</code> if the write was aborted.
 */
private native boolean writeImage(long structPointer,
                                  byte [] data,
                                  int inCsType, int outCsType,
                                  int numBands,
                                  int [] bandSizes,
                                  int srcWidth,
                                  int destWidth, int destHeight,
                                  int stepX, int stepY,
                                  JPEGQTable [] qtables,
                                  boolean writeDQT,
                                  JPEGHuffmanTable[] DCHuffmanTables,
                                  JPEGHuffmanTable[] ACHuffmanTables,
                                  boolean writeDHT,
                                  boolean optimizeHuffman,
                                  boolean progressive,
                                  int numScans,
                                  int [] scans,
                                  int [] componentIds,
                                  int [] HsamplingFactors,
                                  int [] VsamplingFactors,
                                  int [] QtableSelectors,
                                  boolean haveMetadata,
                                  int restartInterval);

Example #7

Source File: JPEGImageWriter.java From openjdk-jdk8u with GNU General Public License v2.0

6 votes

/**
 * Finds all DQT marker segments and returns all the q
 * tables as a single array of JPEGQTables.
 */
private JPEGQTable [] collectQTablesFromMetadata
    (JPEGMetadata metadata) {
    ArrayList tables = new ArrayList();
    Iterator iter = metadata.markerSequence.iterator();
    while (iter.hasNext()) {
        MarkerSegment seg = (MarkerSegment) iter.next();
        if (seg instanceof DQTMarkerSegment) {
            DQTMarkerSegment dqt =
                (DQTMarkerSegment) seg;
            tables.addAll(dqt.tables);
        }
    }
    JPEGQTable [] retval = null;
    if (tables.size() != 0) {
        retval = new JPEGQTable[tables.size()];
        for (int i = 0; i < retval.length; i++) {
            retval[i] =
                new JPEGQTable(((DQTMarkerSegment.Qtable)tables.get(i)).data);
        }
    }
    return retval;
}

Example #8

Source File: DQTMarkerSegment.java From jdk8u-jdk with GNU General Public License v2.0

6 votes

Qtable(boolean wantLuma, float quality) {
    elementPrecision = 0;
    JPEGQTable base = null;
    if (wantLuma) {
        tableID = 0;
        base = JPEGQTable.K1Div2Luminance;
    } else {
        tableID = 1;
        base = JPEGQTable.K2Div2Chrominance;
    }
    if (quality != JPEG.DEFAULT_QUALITY) {
        quality = JPEG.convertToLinearQuality(quality);
        if (wantLuma) {
            base = JPEGQTable.K1Luminance.getScaledInstance
                (quality, true);
        } else {
            base = JPEGQTable.K2Div2Chrominance.getScaledInstance
                (quality, true);
        }
    }
    data = base.getTable();
}

Example #9

Source File: DQTMarkerSegment.java From Bytecoder with Apache License 2.0

6 votes

void print() {
    System.out.println("Table id: " + Integer.toString(tableID));
    System.out.println("Element precision: "
                       + Integer.toString(elementPrecision));

    (new JPEGQTable(data)).toString();
    /*
      for (int i = 0; i < 64; i++) {
      if (i % 8 == 0) {
      System.out.println();
      }
      System.out.print(" " + Integer.toString(data[i]));
      }
      System.out.println();
    */
}

Example #10

Source File: DQTMarkerSegment.java From openjdk-jdk8u with GNU General Public License v2.0

6 votes

void print() {
    System.out.println("Table id: " + Integer.toString(tableID));
    System.out.println("Element precision: "
                       + Integer.toString(elementPrecision));

    (new JPEGQTable(data)).toString();
    /*
      for (int i = 0; i < 64; i++) {
      if (i % 8 == 0) {
      System.out.println();
      }
      System.out.print(" " + Integer.toString(data[i]));
      }
      System.out.println();
    */
}

Example #11

Source File: JPEGImageReader.java From dragonwell8_jdk with GNU General Public License v2.0

6 votes

/**
 * Returns <code>true</code> if the read was aborted.
 */
private native boolean readImage(int imageIndex,
                                 long structPointer,
                                 byte [] buffer,
                                 int numRasterBands,
                                 int [] srcBands,
                                 int [] bandSizes,
                                 int sourceXOffset, int sourceYOffset,
                                 int sourceWidth, int sourceHeight,
                                 int periodX, int periodY,
                                 JPEGQTable [] abbrevQTables,
                                 JPEGHuffmanTable [] abbrevDCHuffmanTables,
                                 JPEGHuffmanTable [] abbrevACHuffmanTables,
                                 int minProgressivePass,
                                 int maxProgressivePass,
                                 boolean wantUpdates);

Example #12

Source File: JPEGImageWriter.java From dragonwell8_jdk with GNU General Public License v2.0

6 votes

/**
 * Finds all DQT marker segments and returns all the q
 * tables as a single array of JPEGQTables.
 */
private JPEGQTable [] collectQTablesFromMetadata
    (JPEGMetadata metadata) {
    ArrayList tables = new ArrayList();
    Iterator iter = metadata.markerSequence.iterator();
    while (iter.hasNext()) {
        MarkerSegment seg = (MarkerSegment) iter.next();
        if (seg instanceof DQTMarkerSegment) {
            DQTMarkerSegment dqt =
                (DQTMarkerSegment) seg;
            tables.addAll(dqt.tables);
        }
    }
    JPEGQTable [] retval = null;
    if (tables.size() != 0) {
        retval = new JPEGQTable[tables.size()];
        for (int i = 0; i < retval.length; i++) {
            retval[i] =
                new JPEGQTable(((DQTMarkerSegment.Qtable)tables.get(i)).data);
        }
    }
    return retval;
}

Example #13

Source File: DQTMarkerSegment.java From openjdk-jdk9 with GNU General Public License v2.0

6 votes

Qtable(boolean wantLuma, float quality) {
    elementPrecision = 0;
    JPEGQTable base = null;
    if (wantLuma) {
        tableID = 0;
        base = JPEGQTable.K1Div2Luminance;
    } else {
        tableID = 1;
        base = JPEGQTable.K2Div2Chrominance;
    }
    if (quality != JPEG.DEFAULT_QUALITY) {
        quality = JPEG.convertToLinearQuality(quality);
        if (wantLuma) {
            base = JPEGQTable.K1Luminance.getScaledInstance
                (quality, true);
        } else {
            base = JPEGQTable.K2Div2Chrominance.getScaledInstance
                (quality, true);
        }
    }
    data = base.getTable();
}

Example #14

Source File: DQTMarkerSegment.java From jdk8u-jdk with GNU General Public License v2.0

6 votes

void print() {
    System.out.println("Table id: " + Integer.toString(tableID));
    System.out.println("Element precision: "
                       + Integer.toString(elementPrecision));

    (new JPEGQTable(data)).toString();
    /*
      for (int i = 0; i < 64; i++) {
      if (i % 8 == 0) {
      System.out.println();
      }
      System.out.print(" " + Integer.toString(data[i]));
      }
      System.out.println();
    */
}

Example #15

Source File: JPEGImageReader.java From openjdk-jdk8u-backup with GNU General Public License v2.0

6 votes

/**
 * Returns <code>true</code> if the read was aborted.
 */
private native boolean readImage(int imageIndex,
                                 long structPointer,
                                 byte [] buffer,
                                 int numRasterBands,
                                 int [] srcBands,
                                 int [] bandSizes,
                                 int sourceXOffset, int sourceYOffset,
                                 int sourceWidth, int sourceHeight,
                                 int periodX, int periodY,
                                 JPEGQTable [] abbrevQTables,
                                 JPEGHuffmanTable [] abbrevDCHuffmanTables,
                                 JPEGHuffmanTable [] abbrevACHuffmanTables,
                                 int minProgressivePass,
                                 int maxProgressivePass,
                                 boolean wantUpdates);

Example #16

Source File: JPEGImageWriter.java From openjdk-jdk9 with GNU General Public License v2.0

6 votes

/**
 * Finds all DQT marker segments and returns all the q
 * tables as a single array of JPEGQTables.
 */
private JPEGQTable [] collectQTablesFromMetadata
    (JPEGMetadata metadata) {
    ArrayList<DQTMarkerSegment.Qtable> tables = new ArrayList<>();
    Iterator<MarkerSegment> iter = metadata.markerSequence.iterator();
    while (iter.hasNext()) {
        MarkerSegment seg = iter.next();
        if (seg instanceof DQTMarkerSegment) {
            DQTMarkerSegment dqt =
                (DQTMarkerSegment) seg;
            tables.addAll(dqt.tables);
        }
    }
    JPEGQTable [] retval = null;
    if (tables.size() != 0) {
        retval = new JPEGQTable[tables.size()];
        for (int i = 0; i < retval.length; i++) {
            retval[i] =
                new JPEGQTable(tables.get(i).data);
        }
    }
    return retval;
}

Example #17

Source File: DQTMarkerSegment.java From openjdk-jdk8u with GNU General Public License v2.0

6 votes

Qtable(boolean wantLuma, float quality) {
    elementPrecision = 0;
    JPEGQTable base = null;
    if (wantLuma) {
        tableID = 0;
        base = JPEGQTable.K1Div2Luminance;
    } else {
        tableID = 1;
        base = JPEGQTable.K2Div2Chrominance;
    }
    if (quality != JPEG.DEFAULT_QUALITY) {
        quality = JPEG.convertToLinearQuality(quality);
        if (wantLuma) {
            base = JPEGQTable.K1Luminance.getScaledInstance
                (quality, true);
        } else {
            base = JPEGQTable.K2Div2Chrominance.getScaledInstance
                (quality, true);
        }
    }
    data = base.getTable();
}

Example #18

Source File: JPEGImageWriter.java From TencentKona-8 with GNU General Public License v2.0

6 votes

/**
 * Finds all DQT marker segments and returns all the q
 * tables as a single array of JPEGQTables.
 */
private JPEGQTable [] collectQTablesFromMetadata
    (JPEGMetadata metadata) {
    ArrayList tables = new ArrayList();
    Iterator iter = metadata.markerSequence.iterator();
    while (iter.hasNext()) {
        MarkerSegment seg = (MarkerSegment) iter.next();
        if (seg instanceof DQTMarkerSegment) {
            DQTMarkerSegment dqt =
                (DQTMarkerSegment) seg;
            tables.addAll(dqt.tables);
        }
    }
    JPEGQTable [] retval = null;
    if (tables.size() != 0) {
        retval = new JPEGQTable[tables.size()];
        for (int i = 0; i < retval.length; i++) {
            retval[i] =
                new JPEGQTable(((DQTMarkerSegment.Qtable)tables.get(i)).data);
        }
    }
    return retval;
}

Example #19

Source File: JPEGImageWriter.java From jdk8u-jdk with GNU General Public License v2.0

6 votes

/**
 * Finds all DQT marker segments and returns all the q
 * tables as a single array of JPEGQTables.
 */
private JPEGQTable [] collectQTablesFromMetadata
    (JPEGMetadata metadata) {
    ArrayList tables = new ArrayList();
    Iterator iter = metadata.markerSequence.iterator();
    while (iter.hasNext()) {
        MarkerSegment seg = (MarkerSegment) iter.next();
        if (seg instanceof DQTMarkerSegment) {
            DQTMarkerSegment dqt =
                (DQTMarkerSegment) seg;
            tables.addAll(dqt.tables);
        }
    }
    JPEGQTable [] retval = null;
    if (tables.size() != 0) {
        retval = new JPEGQTable[tables.size()];
        for (int i = 0; i < retval.length; i++) {
            retval[i] =
                new JPEGQTable(((DQTMarkerSegment.Qtable)tables.get(i)).data);
        }
    }
    return retval;
}

Example #20

Source File: DQTMarkerSegment.java From jdk8u60 with GNU General Public License v2.0

6 votes

Qtable(boolean wantLuma, float quality) {
    elementPrecision = 0;
    JPEGQTable base = null;
    if (wantLuma) {
        tableID = 0;
        base = JPEGQTable.K1Div2Luminance;
    } else {
        tableID = 1;
        base = JPEGQTable.K2Div2Chrominance;
    }
    if (quality != JPEG.DEFAULT_QUALITY) {
        quality = JPEG.convertToLinearQuality(quality);
        if (wantLuma) {
            base = JPEGQTable.K1Luminance.getScaledInstance
                (quality, true);
        } else {
            base = JPEGQTable.K2Div2Chrominance.getScaledInstance
                (quality, true);
        }
    }
    data = base.getTable();
}

Example #21

Source File: DQTMarkerSegment.java From openjdk-jdk8u-backup with GNU General Public License v2.0

6 votes

Qtable(boolean wantLuma, float quality) {
    elementPrecision = 0;
    JPEGQTable base = null;
    if (wantLuma) {
        tableID = 0;
        base = JPEGQTable.K1Div2Luminance;
    } else {
        tableID = 1;
        base = JPEGQTable.K2Div2Chrominance;
    }
    if (quality != JPEG.DEFAULT_QUALITY) {
        quality = JPEG.convertToLinearQuality(quality);
        if (wantLuma) {
            base = JPEGQTable.K1Luminance.getScaledInstance
                (quality, true);
        } else {
            base = JPEGQTable.K2Div2Chrominance.getScaledInstance
                (quality, true);
        }
    }
    data = base.getTable();
}

Example #22

Source File: JPEGImageWriter.java From JDKSourceCode1.8 with MIT License

6 votes

/**
 * Returns <code>true</code> if the write was aborted.
 */
private native boolean writeImage(long structPointer,
                                  byte [] data,
                                  int inCsType, int outCsType,
                                  int numBands,
                                  int [] bandSizes,
                                  int srcWidth,
                                  int destWidth, int destHeight,
                                  int stepX, int stepY,
                                  JPEGQTable [] qtables,
                                  boolean writeDQT,
                                  JPEGHuffmanTable[] DCHuffmanTables,
                                  JPEGHuffmanTable[] ACHuffmanTables,
                                  boolean writeDHT,
                                  boolean optimizeHuffman,
                                  boolean progressive,
                                  int numScans,
                                  int [] scans,
                                  int [] componentIds,
                                  int [] HsamplingFactors,
                                  int [] VsamplingFactors,
                                  int [] QtableSelectors,
                                  boolean haveMetadata,
                                  int restartInterval);

Example #23

Source File: JPEGImageWriter.java From JDKSourceCode1.8 with MIT License

6 votes

/**
 * Finds all DQT marker segments and returns all the q
 * tables as a single array of JPEGQTables.
 */
private JPEGQTable [] collectQTablesFromMetadata
    (JPEGMetadata metadata) {
    ArrayList tables = new ArrayList();
    Iterator iter = metadata.markerSequence.iterator();
    while (iter.hasNext()) {
        MarkerSegment seg = (MarkerSegment) iter.next();
        if (seg instanceof DQTMarkerSegment) {
            DQTMarkerSegment dqt =
                (DQTMarkerSegment) seg;
            tables.addAll(dqt.tables);
        }
    }
    JPEGQTable [] retval = null;
    if (tables.size() != 0) {
        retval = new JPEGQTable[tables.size()];
        for (int i = 0; i < retval.length; i++) {
            retval[i] =
                new JPEGQTable(((DQTMarkerSegment.Qtable)tables.get(i)).data);
        }
    }
    return retval;
}

Example #24

Source File: JPEGImageWriter.java From jdk8u60 with GNU General Public License v2.0

6 votes

/**
 * Finds all DQT marker segments and returns all the q
 * tables as a single array of JPEGQTables.
 */
private JPEGQTable [] collectQTablesFromMetadata
    (JPEGMetadata metadata) {
    ArrayList tables = new ArrayList();
    Iterator iter = metadata.markerSequence.iterator();
    while (iter.hasNext()) {
        MarkerSegment seg = (MarkerSegment) iter.next();
        if (seg instanceof DQTMarkerSegment) {
            DQTMarkerSegment dqt =
                (DQTMarkerSegment) seg;
            tables.addAll(dqt.tables);
        }
    }
    JPEGQTable [] retval = null;
    if (tables.size() != 0) {
        retval = new JPEGQTable[tables.size()];
        for (int i = 0; i < retval.length; i++) {
            retval[i] =
                new JPEGQTable(((DQTMarkerSegment.Qtable)tables.get(i)).data);
        }
    }
    return retval;
}

Example #25

Source File: JPEGImageReader.java From JDKSourceCode1.8 with MIT License

6 votes

/**
 * Returns <code>true</code> if the read was aborted.
 */
private native boolean readImage(int imageIndex,
                                 long structPointer,
                                 byte [] buffer,
                                 int numRasterBands,
                                 int [] srcBands,
                                 int [] bandSizes,
                                 int sourceXOffset, int sourceYOffset,
                                 int sourceWidth, int sourceHeight,
                                 int periodX, int periodY,
                                 JPEGQTable [] abbrevQTables,
                                 JPEGHuffmanTable [] abbrevDCHuffmanTables,
                                 JPEGHuffmanTable [] abbrevACHuffmanTables,
                                 int minProgressivePass,
                                 int maxProgressivePass,
                                 boolean wantUpdates);

Example #26

Source File: DQTMarkerSegment.java From JDKSourceCode1.8 with MIT License

6 votes

Qtable(boolean wantLuma, float quality) {
    elementPrecision = 0;
    JPEGQTable base = null;
    if (wantLuma) {
        tableID = 0;
        base = JPEGQTable.K1Div2Luminance;
    } else {
        tableID = 1;
        base = JPEGQTable.K2Div2Chrominance;
    }
    if (quality != JPEG.DEFAULT_QUALITY) {
        quality = JPEG.convertToLinearQuality(quality);
        if (wantLuma) {
            base = JPEGQTable.K1Luminance.getScaledInstance
                (quality, true);
        } else {
            base = JPEGQTable.K2Div2Chrominance.getScaledInstance
                (quality, true);
        }
    }
    data = base.getTable();
}

Example #27

Source File: DQTMarkerSegment.java From TencentKona-8 with GNU General Public License v2.0

6 votes

Qtable(boolean wantLuma, float quality) {
    elementPrecision = 0;
    JPEGQTable base = null;
    if (wantLuma) {
        tableID = 0;
        base = JPEGQTable.K1Div2Luminance;
    } else {
        tableID = 1;
        base = JPEGQTable.K2Div2Chrominance;
    }
    if (quality != JPEG.DEFAULT_QUALITY) {
        quality = JPEG.convertToLinearQuality(quality);
        if (wantLuma) {
            base = JPEGQTable.K1Luminance.getScaledInstance
                (quality, true);
        } else {
            base = JPEGQTable.K2Div2Chrominance.getScaledInstance
                (quality, true);
        }
    }
    data = base.getTable();
}

Example #28

Source File: DQTMarkerSegment.java From openjdk-jdk8u-backup with GNU General Public License v2.0

5 votes

IIOMetadataNode getNativeNode() {
    IIOMetadataNode node = new IIOMetadataNode("dqtable");
    node.setAttribute("elementPrecision",
                      Integer.toString(elementPrecision));
    node.setAttribute("qtableId",
                      Integer.toString(tableID));
    node.setUserObject(new JPEGQTable(data));
    return node;
}

Example #29

Source File: JPEG.java From Bytecoder with Apache License 2.0

5 votes

/**
 * Return an array of default, visually lossless quantization tables.
 */
static JPEGQTable [] getDefaultQTables() {
    JPEGQTable [] qTables = new JPEGQTable[2];
    qTables[0] = JPEGQTable.K1Div2Luminance;
    qTables[1] = JPEGQTable.K2Div2Chrominance;
    return qTables;
}

Example #30

Source File: DQTMarkerSegment.java From jdk8u60 with GNU General Public License v2.0

5 votes

/**
 * Assuming the given table was generated by scaling the "standard"
 * visually lossless luminance table, extract the scale factor that
 * was used.
 */
Qtable getChromaForLuma(Qtable luma) {
    Qtable newGuy = null;
    // Determine if the table is all the same values
    // if so, use the same table
    boolean allSame = true;
    for (int i = 1; i < luma.QTABLE_SIZE; i++) {
        if (luma.data[i] != luma.data[i-1]) {
            allSame = false;
            break;
        }
    }
    if (allSame) {
        newGuy = (Qtable) luma.clone();
        newGuy.tableID = 1;
    } else {
        // Otherwise, find the largest coefficient less than 255.  This is
        // the largest value that we know did not clamp on scaling.
        int largestPos = 0;
        for (int i = 1; i < luma.QTABLE_SIZE; i++) {
            if (luma.data[i] > luma.data[largestPos]) {
                largestPos = i;
            }
        }
        // Compute the scale factor by dividing it by the value in the
        // same position from the "standard" table.
        // If the given table was not generated by scaling the standard,
        // the resulting table will still be reasonable, as it will reflect
        // a comparable scaling of chrominance frequency response of the
        // eye.
        float scaleFactor = ((float)(luma.data[largestPos]))
            / ((float)(JPEGQTable.K1Div2Luminance.getTable()[largestPos]));
        //    generate a new table
        JPEGQTable jpegTable =
            JPEGQTable.K2Div2Chrominance.getScaledInstance(scaleFactor,
                                                           true);
        newGuy = new Qtable(jpegTable, 1);
    }
    return newGuy;
}