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| DcmQuantFloydSteinberg () |
| constructor
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| ~DcmQuantFloydSteinberg () |
| destructor
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OFCondition | initialize (unsigned long cols) |
| initializes the Floyd-Steinberg error vectors for an image with the given number of columns.
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void | adjust (DcmQuantPixel &px, long col, long maxval) |
| uses the Floyd-Steinberg error vectors to adjust the color of the current image pixel.
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void | propagate (const DcmQuantPixel &px, const DcmQuantPixel &mapped, long col) |
| propagates the Floyd-Steinberg error terms for one pixel.
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void | startRow (long &col, long &limitcol) |
| starts error diffusion for a new row.
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void | finishRow () |
| finishes error diffusion for one image row.
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void | nextCol (long &col) const |
| increases or decreases the column number depending on the direction flag.
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long * | thisrerr |
| current red error vector. Points to an array of (columns + 2) entries.
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long * | nextrerr |
| red error vector for next row. Points to an array of (columns + 2) entries.
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long * | thisgerr |
| current green error vector. Points to an array of (columns + 2) entries.
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long * | nextgerr |
| green error vector for next row. Points to an array of (columns + 2) entries.
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long * | thisberr |
| current blue error vector. Points to an array of (columns + 2) entries.
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long * | nextberr |
| blue error vector for next row. Points to an array of (columns + 2) entries.
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long * | temperr |
| temporary pointer used for swapping error vectors
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int | fs_direction |
| boolean flag indicating in which direction (left to right/right to left) the FS distribution should be done.
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unsigned long | columns |
| number of columns in image
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this class implements Floyd-Steinberg error diffusion.
It is used during the color quantization of an image.
void DcmQuantFloydSteinberg::startRow |
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long & | col, |
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long & | limitcol ) |
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inline |
starts error diffusion for a new row.
The error vectors for the next image row are initialized to zero. The initial and last column of the current row are determined
- Parameters
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col | initial column for the current row returned in this parameter |
limitcol | limit column (one past the last valid column) for the current row returned in this parameter. May become negative. |
References columns, fs_direction, nextberr, nextgerr, and nextrerr.