| Name | Description | |
|---|---|---|
 | anGainExp | The base 2 exponent of the analysis gain of the subband. The analysis gain of a subband is defined as the gain of the previous subband (i.e. the one from which this one was obtained) multiplied by the line gain and by the column gain. The line (column) gain is the gain of the line (column) filter that was used to obtain it, which is the DC gain for a low-pass filter and the Nyquist gain for a high-pass filter. It is 0 by default.
Using the base 2 exponent of the value contrains the possible gains to powers of 2. However this is perfectly compatible to the filter normalization policy assumed here. See the split() method for more details. |
| h | The height of the subband |
| isNode | True if it is a node in the tree, false if it is a leaf. |
| level | The level in the tree to which this subband belongs, which is the number of performed wavelet decompositions to get this subband. It is 0 for the top-level (i.e. root) node. |
| nomCBlkH | The nominal code-block height |
| nomCBlkW | The nominal code-block width |
| numCb | The number of code-blocks (in both directions) contained in this subband. |
| orientation | The orientation of this subband (WT_ORIENT_LL, WT_ORIENT_HL, WT_ORIENT_LH, WT_ORIENT_HH). |
| resLvl | The resolution level to which this subband contributes. 0 is the smallest resolution level (the one with the lowest frequency LL subband). |
| sbandIdx | The subband index within its resolution level. This value uniquely identifies a subband within a resolution level and a decomposition level within it. Note that only leaf elements represent "real" subbands, while node elements represent only intermediate stages.
It is defined recursively. The root node gets a value of 0. For a given node, with a subband index 'b', its LL descendant gets 4*b, its HL descendant 4*b+1, its LH descendant 4*b+2, and its HH descendant 4*b+3, for their subband indexes. |
| ulcx | The horizontal coordinate of the upper-left corner of the subband, with respect to the canvas origin, in the component's grid and subband's decomposition level. This is the real horizontal index of the first column of this subband. If even the horizontal decomposition of this subband should be done with the low-pass-first convention. If odd it should be done with the high-pass-first convention. |
| ulcy | The vertical coordinate of the upper-left corner of the subband, with respect to the canvas origin, in the component's grid and subband's decomposition level. This is the real vertical index of the first column of this subband. If even the vertical decomposition of this subband should be done with the low-pass-first convention. If odd it should be done with the high-pass-first convention. |
| ulx | The horizontal coordinate of the upper-left corner of the subband |
| uly | The vertical coordinate of the upper-left corner of the subband |
| w | The width of the subband |
| WT_ORIENT_HH | The ID for the HH orientation |
| WT_ORIENT_HL | The ID for the HL (horizontal high-pass) orientation |
| WT_ORIENT_LH | The ID for the LH (vertical high-pass) orientation |
| WT_ORIENT_LL | The ID for the LL orientation |
