Package jj2000.j2k.roi.encoder
Class ArbROIMaskGenerator
- java.lang.Object
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- jj2000.j2k.roi.encoder.ROIMaskGenerator
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- jj2000.j2k.roi.encoder.ArbROIMaskGenerator
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public class ArbROIMaskGenerator extends ROIMaskGenerator
This class generates the ROI bit-mask when, at least, one ROI is not rectangular. In this case, the fast ROI bit-mask algorithm generation can not be used.The values are calculated from the scaling factors of the ROIs. The values with which to scale are equal to u-umin where umin is the lowest scaling factor within the block. The umin value is sent to the entropy coder to be used for scaling the distortion values.
- See Also:
ROIMaskGenerator
,ArbROIMaskGenerator
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Field Summary
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Fields inherited from class jj2000.j2k.roi.encoder.ROIMaskGenerator
nrc, rois, tileMaskMade
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Constructor Summary
Constructors Constructor Description ArbROIMaskGenerator(ROI[] rois, int nrc, Quantizer src)
The constructor of the arbitrary mask generator
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
getROIMask(DataBlkInt db, Subband sb, int magbits, int c)
This functions gets a DataBlk the size of the current code-block an fills this block with the ROI mask.void
makeMask(Subband sb, int magbits, int c)
This function generates the ROI mask for one tile-component.String
toString()
This function returns the relevant data of the mask generator-
Methods inherited from class jj2000.j2k.roi.encoder.ROIMaskGenerator
getROIs, tileChanged
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Method Detail
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getROIMask
public boolean getROIMask(DataBlkInt db, Subband sb, int magbits, int c)
This functions gets a DataBlk the size of the current code-block an fills this block with the ROI mask.In order to get the mask for a particular Subband, the subband tree is traversed and at each decomposition, the ROI masks are computed.
The widths of the synthesis filters corresponding to the wavelet filters used in the wavelet transform are used to expand the ROI masks in the decompositions.
- Specified by:
getROIMask
in classROIMaskGenerator
- Parameters:
db
- The data block that is to be filled with the masksb
- The root of the subband tree to which db belongsmagbits
- The max number of magnitude bits in any code-blockc
- The number of the component- Returns:
- Whether or not a mask was needed for this tile
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toString
public String toString()
This function returns the relevant data of the mask generator
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makeMask
public void makeMask(Subband sb, int magbits, int c)
This function generates the ROI mask for one tile-component.Once the mask is generated in the pixel domain. it is decomposed following the same decomposition scheme as the wavelet transform.
- Specified by:
makeMask
in classROIMaskGenerator
- Parameters:
sb
- The root of the subband tree used in the decompositionmagbits
- The max number of magnitude bits in any code-blockc
- component number
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