public class Paeth extends PredictorAlgorithm
Paeth(i,j) = Raw(i,j) - PaethPredictor(Raw(i-1,j), Raw(i,j-1), Raw(i-1,j-1))
To decode the Paeth filter
Raw(i,j) = Paeth(i,j) - PaethPredictor(Raw(i-1,j), Raw(i,j-1), Raw(i-1,j-1))
Constructor | Description |
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Paeth() |
Modifier and Type | Method | Description |
---|---|---|
void |
decodeLine(byte[] src,
byte[] dest,
int srcDy,
int srcOffset,
int destDy,
int destOffset) |
decode line of pixel data in src from src_offset and width*bpp bytes
forward, put the decoded bytes into dest.
|
void |
encodeLine(byte[] src,
byte[] dest,
int srcDy,
int srcOffset,
int destDy,
int destOffset) |
encode line of pixel data in src from srcOffset and width*bpp bytes
forward, put the decoded bytes into dest.
|
int |
paethPredictor(int a,
int b,
int c) |
The paeth predictor function.
|
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait
aboveLeftPixel, abovePixel, checkBufsiz, decode, encode, getBpp, getFilter, getHeight, getWidth, leftPixel, main, setBpp, setHeight, setWidth
public int paethPredictor(int a, int b, int c)
a
- leftb
- abovec
- upper leftpublic void encodeLine(byte[] src, byte[] dest, int srcDy, int srcOffset, int destDy, int destOffset)
encodeLine
in class PredictorAlgorithm
src
- raw image datadest
- encoded datasrcDy
- byte offset between linessrcOffset
- beginning of line datadestDy
- byte offset between linesdestOffset
- beginning of line datapublic void decodeLine(byte[] src, byte[] dest, int srcDy, int srcOffset, int destDy, int destOffset)
decodeLine
in class PredictorAlgorithm
src
- encoded image datadest
- raw datasrcDy
- byte offset between linessrcOffset
- beginning of line datadestDy
- byte offset between linesdestOffset
- beginning of line data