|
|||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD | ||||||||
java.lang.Objectjavax.imageio.plugins.jpeg.JPEGQTable
public class JPEGQTable
The JPEGQTable class represents a quantization table that can be used to encode or decode a JPEG stream. The standard JPEG luminance and chrominance quantization tables are provided as static fields. Table entries are stored in natural order, not zig-zag order.
| Field Summary | |
|---|---|
static JPEGQTable |
K1Div2Luminance
The standard JPEG luminance quantization table, scaled by one-half. |
static JPEGQTable |
K1Luminance
The standard JPEG luminance quantization table. |
static JPEGQTable |
K2Chrominance
The standard JPEG chrominance quantization table. |
static JPEGQTable |
K2Div2Chrominance
The standard JPEG chrominance quantization table, scaled by one-half. |
| Constructor Summary | |
|---|---|
JPEGQTable(int[] table)
Construct a new JPEG quantization table. |
|
| Method Summary | |
|---|---|
JPEGQTable |
getScaledInstance(float scaleFactor,
boolean forceBaseline)
Retrieve a copy of this JPEG quantization table with every value scaled by the given scale factor, and clamped from 1 to 255 baseline or from 1 to 32767 otherwise. |
int[] |
getTable()
Retrieve a copy of the quantization values for this table. |
String |
toString()
Create a string representing this JPEG quantization table. |
| Methods inherited from class java.lang.Object |
|---|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
| Field Detail |
|---|
public static final JPEGQTable K1Luminance
public static final JPEGQTable K1Div2Luminance
public static final JPEGQTable K2Chrominance
public static final JPEGQTable K2Div2Chrominance
| Constructor Detail |
|---|
public JPEGQTable(int[] table)
table - the 64-element value table, stored in natural order
IllegalArgumentException - if the table is null or if
table's length is not equal to 64.| Method Detail |
|---|
public int[] getTable()
public JPEGQTable getScaledInstance(float scaleFactor,
boolean forceBaseline)
scaleFactor - the factor by which to scale this tableforceBaseline - clamp scaled values to a maximum of 255 if
true, 32767 if false
public String toString()
toString in class ObjectObject.getClass(),
Object.hashCode(),
Class.getName(),
Integer.toHexString(int)
|
|||||||||
| PREV CLASS NEXT CLASS | FRAMES NO FRAMES | ||||||||
| SUMMARY: NESTED | FIELD | CONSTR | METHOD | DETAIL: FIELD | CONSTR | METHOD | ||||||||