Package jj2000.j2k.roi.encoder
Class ROIMaskGenerator
java.lang.Object
jj2000.j2k.roi.encoder.ROIMaskGenerator
- Direct Known Subclasses:
ArbROIMaskGenerator,RectROIMaskGenerator
This class generates the ROI masks for the ROIScaler.It gives the scaler
the ROI mask for the current code-block.
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:
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Field Summary
FieldsModifier and TypeFieldDescriptionprotected intNumber of componentsprotected booleanprotected ROI[]Array containing the ROIsprotected boolean[]Flag indicating whether a mask has been made for the current tile -
Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionabstract booleangetROIMask(DataBlkInt db, Subband sb, int magbits, int c) This functions gets a DataBlk with the size of the current code-block and fills it with the ROI mask.ROI[]getROIs()This function returns the ROIs in the imageabstract voidThis function generates the ROI mask for the entire tile.voidThis function is called every time the tile is changed to indicate that there is need to make a new mask
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Field Details
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rois
Array containing the ROIs -
nrc
protected int nrcNumber of components -
tileMaskMade
protected boolean[] tileMaskMadeFlag indicating whether a mask has been made for the current tile -
roiInTile
protected boolean roiInTile
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Constructor Details
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ROIMaskGenerator
The constructor of the mask generator- Parameters:
rois- The ROIs in the imagenrc- The number of components
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Method Details
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getROIs
This function returns the ROIs in the image- Returns:
- The ROIs in the image
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getROIMask
This functions gets a DataBlk with the size of the current code-block and fills it with the ROI mask. The lowest scaling value in the mask for this code-block is returned by the function to be used for modifying the rate distortion estimations.- Parameters:
db- The data block that is to be filled with the masksb- The root of the current subband treemagbits- The number of magnitude bits in this code-blockc- Component number- Returns:
- Whether or not a mask was needed for this tile
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makeMask
This function generates the ROI mask for the entire tile. The mask is generated for one component. This method is called once for each tile and component.- Parameters:
sb- The root of the subband tree used in the decompositionmagbits- The max number of magnitude bits in any code-blockn- component number
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tileChanged
public void tileChanged()This function is called every time the tile is changed to indicate that there is need to make a new mask
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