public class JPEGQTable extends Object
For more information about the operation of the standard JPEG plug-in, see the JPEG metadata format specification and usage notes
| Modifier and Type | Field and Description |
|---|---|
static JPEGQTable |
K1Div2Luminance
The sample luminance quantization table given in the JPEG
specification, table K.1, with all elements divided by 2.
|
static JPEGQTable |
K1Luminance
The sample luminance quantization table given in the JPEG
specification, table K.1.
|
static JPEGQTable |
K2Chrominance
The sample chrominance quantization table given in the JPEG
specification, table K.2.
|
static JPEGQTable |
K2Div2Chrominance
The sample chrominance quantization table given in the JPEG
specification, table K.1, with all elements divided by 2.
|
| Constructor and Description |
|---|
JPEGQTable(int[] table)
Constructs a quantization table from the argument, which must
contain 64 elements in natural order (not zig-zag order).
|
| Modifier and Type | Method and Description |
|---|---|
JPEGQTable |
getScaledInstance(float scaleFactor,
boolean forceBaseline)
Returns a new quantization table where the values are multiplied
by
scaleFactor and then clamped to the range 1..32767
(or to 1..255 if forceBaseline is true). |
int[] |
getTable()
Returns a copy of the current quantization table as an array
of
ints in natural (not zig-zag) order. |
String |
toString()
Returns a
String representing this quantization table. |
public static final JPEGQTable K1Luminance
K1Div2Luminancepublic static final JPEGQTable K1Div2Luminance
K1Luminancepublic static final JPEGQTable K2Chrominance
K2Div2Chrominancepublic static final JPEGQTable K2Div2Chrominance
K2Chrominancepublic JPEGQTable(int[] table)
table - the quantization table, as an int array.IllegalArgumentException - if table is
null or table.length is not equal to 64.public int[] getTable()
ints in natural (not zig-zag) order.public JPEGQTable getScaledInstance(float scaleFactor, boolean forceBaseline)
scaleFactor and then clamped to the range 1..32767
(or to 1..255 if forceBaseline is true).
Values of scaleFactor less than 1 tend to improve
the quality level of the table, and values greater than 1.0
degrade the quality level of the table.
scaleFactor - multiplication factor for the table.forceBaseline - if true,
the values will be clamped to the range 1..255 Submit a bug or feature
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