| HighPass |
Retain edge details in the specified radius where sharp color transitions occur and suppresses the rest of the image. The filter removes low-frequency detail in an image. The filter is useful for extracting line art and large black-and-white areas from scanned images. |
| LowPass |
Erode edge details in the specified radius where sharp color transitions occur. The filter removes high-frequency detail in an image. |
Difference |
The overfalls search direction. The following values are accepted:
- North . Detect irregularities in north direction.
- NorthWest . Detect irregularities in north-west direction.
- West . Detect irregularities in west direction.
- SouthWest . Detect irregularities in south-west direction.
- South . Detect irregularities in south direction.
- SouthEast . Detect irregularities in south-east direction.
- East . Detect irregularities in east direction.
- Northeast . Detect irregularities in north-east direction.
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Laplas |
A Laplas filter type. The following values are accepted:
- High . Detection of the small irregularities in all directions.
- Low . Detection of the big irregularities in all directions.
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Sobel |
A Sobel filter type. The following values are accepted:
- Vertical . Detection of vertical irregularities.
- Horizontal . Detection of horizontal irregularities.
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Prewitt |
A Prewitt filter type. The following values are accepted:
- Vertical . Detection of vertical irregularities.
- Horizontal . Detection of horizontal irregularities.
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Roberts |
A Roberts filter type. The following values are accepted:
- Diagonal1 . Detection of irregularities along first diagonal.
- Diagonal2 . Detection of irregularities along second diagonal.
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Isotropic |
A Isotropic filter type. The following values are accepted:
- Vertical . Detection of vertical irregularities.
- Horizontal . Detection of horizontal irregularities.
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| LineDetection |
The type of lines to detect. The following values are accepted:
- Vertical . Detection of vertical irregularities.
- Horizontal . Detection of horizontal irregularities.
- Diagonal1 . Detection of first diagonal irregularities.
- Diagonal2 . Detection of second diagonal irregularities.
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