Examples of ae.javax.imageio.plugins.jpeg.JPEGQTable

ae.javax.imageio.plugins.jpeg.JPEGQTable
A class encapsulating a single JPEG quantization table. The elements appear in natural order (as opposed to zig-zag order). Static variables are provided for the "standard" tables taken from Annex K of the JPEG specification, as well as the default tables conventionally used for visually lossless encoding.
For more information about the operation of the standard JPEG plug-in, see the JPEG metadata format specification and usage notes

        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;
    }

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            // 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;

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            35, 36, 48, 49, 57, 58, 62, 63
        };


        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();
        }

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                }
                elementPrecision = 0;
                tableID = getAttributeValue(node, attrs, "qtableId", 0, 3, true);
                if (node instanceof IIOMetadataNode) {
                    IIOMetadataNode ourNode = (IIOMetadataNode) node;
                    JPEGQTable table = (JPEGQTable) ourNode.getUserObject();
                    if (table == null) {
                        throw new IIOInvalidTreeException
                            ("dqtable node must have user object", node);
                    }
                    data = table.getTable();
                } else {
                    throw new IIOInvalidTreeException
                        ("dqtable node must have user object", node);
                }
            } else {

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

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        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();
              }

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Related Classes of ae.javax.imageio.plugins.jpeg.JPEGQTable

ae.com.sun.imageio.plugins.jpeg.DQTMarkerSegment

ae.com.sun.imageio.plugins.jpeg.DQTMarkerSegment$Qtable

ae.com.sun.imageio.plugins.jpeg.JPEGImageWriter

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