![]() | ![]() | Gwyddion Data Processing Library Reference Manual | ![]() |
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filtersfilters — Convolution and other data filters |
enum GwyFilterType; void gwy_data_field_area_convolve (GwyDataField *data_field, GwyDataField *kernel_field, gint col, gint row, gint width, gint height); void gwy_data_field_area_filter_median (GwyDataField *data_field, gint size, gint col, gint row, gint width, gint height); void gwy_data_field_area_filter_mean (GwyDataField *data_field, gint size, gint col, gint row, gint width, gint height); void gwy_data_field_area_filter_conservative (GwyDataField *data_field, gint size, gint col, gint row, gint width, gint height); void gwy_data_field_area_filter_laplacian (GwyDataField *data_field, gint col, gint row, gint width, gint height); void gwy_data_field_area_filter_sobel (GwyDataField *data_field, GtkOrientation orientation, gint col, gint row, gint width, gint height); void gwy_data_field_area_filter_prewitt (GwyDataField *data_field, GtkOrientation orientation, gint col, gint row, gint width, gint height); void gwy_data_field_area_filter_canny (GwyDataField *data_field, gdouble threshold, gint col, gint row, gint width, gint height); void gwy_data_field_filter_minimum (GwyDataField *data_field, gint size); void gwy_data_field_area_filter_minimum (GwyDataField *data_field, gint size, gint col, gint row, gint width, gint height); void gwy_data_field_filter_maximum (GwyDataField *data_field, gint size); void gwy_data_field_area_filter_maximum (GwyDataField *data_field, gint size, gint col, gint row, gint width, gint height); void gwy_data_field_filter_rms (GwyDataField *data_field, gint size); void gwy_data_field_area_filter_rms (GwyDataField *data_field, gint size, gint col, gint row, gint width, gint height); void gwy_data_field_filter_kuwahara (GwyDataField *data_field); void gwy_data_field_area_filter_kuwahara (GwyDataField *data_field, gint col, gint row, gint width, gint height); void gwy_data_field_convolve (GwyDataField *data_field, GwyDataField *kernel_field, gint ulcol, gint ulrow, gint brcol, gint brrow); void gwy_data_field_filter_median (GwyDataField *data_field, gint size, gint ulcol, gint ulrow, gint brcol, gint brrow); void gwy_data_field_filter_mean (GwyDataField *data_field, gint size, gint ulcol, gint ulrow, gint brcol, gint brrow); void gwy_data_field_filter_conservative (GwyDataField *data_field, gint size, gint ulcol, gint ulrow, gint brcol, gint brrow); void gwy_data_field_filter_laplacian (GwyDataField *data_field, gint ulcol, gint ulrow, gint brcol, gint brrow); void gwy_data_field_filter_sobel (GwyDataField *data_field, GtkOrientation orientation, gint ulcol, gint ulrow, gint brcol, gint brrow); void gwy_data_field_filter_prewitt (GwyDataField *data_field, GtkOrientation orientation, gint ulcol, gint ulrow, gint brcol, gint brrow);
typedef enum { GWY_FILTER_MEAN = 0, /*mean value filter (averaging)*/ GWY_FILTER_MEDIAN = 1, /*median value filter*/ GWY_FILTER_CONSERVATIVE = 2, /*conservative denoising filter*/ GWY_FILTER_LAPLACIAN = 3, /*Laplacian 2nd derivative filter*/ GWY_FILTER_SOBEL = 4, /*Sobel gradient filter*/ GWY_FILTER_PREWITT = 5, /*Prewitt gradient filter*/ GWY_FILTER_MINIMUM, GWY_FILTER_MAXIMUM, GWY_FILTER_KUWAHARA } GwyFilterType;
Filtering type. Possibilities constist of simple statisical and directional filters.
void gwy_data_field_area_convolve (GwyDataField *data_field, GwyDataField *kernel_field, gint col, gint row, gint width, gint height);
Convolves a rectangular part of a data field with given kernel.
data_field : | A data field to convolve. It must be larger than kernel_field (or at least of the same size). |
kernel_field : | Kenrel field to convolve data_field with. |
col : | Upper-left column coordinate. |
row : | Upper-left row coordinate. |
width : | Area width (number of columns). |
height : | Area height (number of rows). |
Since 1.3
void gwy_data_field_area_filter_median (GwyDataField *data_field, gint size, gint col, gint row, gint width, gint height);
Filters a rectangular part of a data field with median filter.
data_field : | A data field to apply mean filter to. |
size : | Averaged area size. |
col : | Upper-left column coordinate. |
row : | Upper-left row coordinate. |
width : | Area width (number of columns). |
height : | Area height (number of rows). |
Since 1.3
void gwy_data_field_area_filter_mean (GwyDataField *data_field, gint size, gint col, gint row, gint width, gint height);
Filters a rectangular part of a data field with mean filter of size size.
data_field : | A data field to apply mean filter to. |
size : | Averaged area size. |
col : | Upper-left column coordinate. |
row : | Upper-left row coordinate. |
width : | Area width (number of columns). |
height : | Area height (number of rows). |
Since 1.3
void gwy_data_field_area_filter_conservative (GwyDataField *data_field, gint size, gint col, gint row, gint width, gint height);
Filters a rectangular part of a data field with conservative denoise filter.
data_field : | A data field to apply mean filter to. |
size : | Filtered area size. |
col : | Upper-left column coordinate. |
row : | Upper-left row coordinate. |
width : | Area width (number of columns). |
height : | Area height (number of rows). |
Since 1.3
void gwy_data_field_area_filter_laplacian (GwyDataField *data_field, gint col, gint row, gint width, gint height);
Filters a rectangular part of a data field with Laplacian filter.
data_field : | A data field to apply mean filter to. |
col : | Upper-left column coordinate. |
row : | Upper-left row coordinate. |
width : | Area width (number of columns). |
height : | Area height (number of rows). |
Since 1.3
void gwy_data_field_area_filter_sobel (GwyDataField *data_field, GtkOrientation orientation, gint col, gint row, gint width, gint height);
Filters a rectangular part of a data field with Laplacian filter.
data_field : | A data field to apply mean filter to. |
orientation : | Filter orientation. |
col : | Upper-left column coordinate. |
row : | Upper-left row coordinate. |
width : | Area width (number of columns). |
height : | Area height (number of rows). |
Since 1.3
void gwy_data_field_area_filter_prewitt (GwyDataField *data_field, GtkOrientation orientation, gint col, gint row, gint width, gint height);
Filters a rectangular part of a data field with Prewitt filter.
data_field : | A data field to apply mean filter to. |
orientation : | Filter orientation. |
col : | Upper-left column coordinate. |
row : | Upper-left row coordinate. |
width : | Area width (number of columns). |
height : | Area height (number of rows). |
Since 1.3
void gwy_data_field_area_filter_canny (GwyDataField *data_field, gdouble threshold, gint col, gint row, gint width, gint height);
Filters a rectangular part of a data field with canny edge detector filter.
In version 1.6 this function filters whole data field.
data_field : | A data field to apply mean filter to. |
threshold : | Slope detection threshold (range 0..1). |
col : | Upper-left column coordinate. |
row : | Upper-left row coordinate. |
width : | Area width (number of columns). |
height : | Area height (number of rows). |
Since 1.6
void gwy_data_field_filter_minimum (GwyDataField *data_field, gint size);
Filters a data field with minimum filter.
data_field : | A data field to apply minimum filter to. |
size : | Neighbourhood size for minimum search. |
Since 1.8
void gwy_data_field_area_filter_minimum (GwyDataField *data_field, gint size, gint col, gint row, gint width, gint height);
Filters a rectangular part of a data field with minimum filter.
data_field : | A data field to apply minimum filter to. |
size : | Neighbourhood size for minimum search. |
col : | Upper-left column coordinate. |
row : | Upper-left row coordinate. |
width : | Area width (number of columns). |
height : | Area height (number of rows). |
Since 1.8
void gwy_data_field_filter_maximum (GwyDataField *data_field, gint size);
Filters a data field with maximum filter.
data_field : | A data field to apply maximum filter to. |
size : | Neighbourhood size for maximum search. |
Since 1.8
void gwy_data_field_area_filter_maximum (GwyDataField *data_field, gint size, gint col, gint row, gint width, gint height);
Filters a rectangular part of a data field with maximum filter.
data_field : | A data field to apply maximum filter to. |
size : | Neighbourhood size for maximum search. |
col : | Upper-left column coordinate. |
row : | Upper-left row coordinate. |
width : | Area width (number of columns). |
height : | Area height (number of rows). |
Since 1.8
void gwy_data_field_filter_rms (GwyDataField *data_field, gint size);
Filters a data field with RMS filter.
data_field : | A data field to apply RMS filter to. |
size : | Area size. |
Since 1.9
void gwy_data_field_area_filter_rms (GwyDataField *data_field, gint size, gint col, gint row, gint width, gint height);
Filters a rectangular part of a data field with RMS filter of size size.
RMS filter computes root mean square in given area.
data_field : | A data field to apply RMS filter to. |
size : | Area size. |
col : | Upper-left column coordinate. |
row : | Upper-left row coordinate. |
width : | Area width (number of columns). |
height : | Area height (number of rows). |
Since 1.9
void gwy_data_field_filter_kuwahara (GwyDataField *data_field);
Filters a data field with Kuwahara filter.
data_field : | A data field to apply Kuwahara filter to. |
Since 1.9
void gwy_data_field_area_filter_kuwahara (GwyDataField *data_field, gint col, gint row, gint width, gint height);
Filters a rectangular part of a data field with a Kuwahara (edge-preserving smoothing) filter.
data_field : | A data filed to apply Kuwahara filter to. |
col : | Upper-left column coordinate. |
row : | Upper-left row coordinate. |
width : | Area width (number of columns). |
height : | Area height (number of rows). |
Since 1.9
void gwy_data_field_convolve (GwyDataField *data_field, GwyDataField *kernel_field, gint ulcol, gint ulrow, gint brcol, gint brrow);
data_field : | |
kernel_field : | |
ulcol : | |
ulrow : | |
brcol : | |
brrow : |
void gwy_data_field_filter_median (GwyDataField *data_field, gint size, gint ulcol, gint ulrow, gint brcol, gint brrow);
data_field : | |
size : | |
ulcol : | |
ulrow : | |
brcol : | |
brrow : |
void gwy_data_field_filter_mean (GwyDataField *data_field, gint size, gint ulcol, gint ulrow, gint brcol, gint brrow);
data_field : | |
size : | |
ulcol : | |
ulrow : | |
brcol : | |
brrow : |
void gwy_data_field_filter_conservative (GwyDataField *data_field, gint size, gint ulcol, gint ulrow, gint brcol, gint brrow);
data_field : | |
size : | |
ulcol : | |
ulrow : | |
brcol : | |
brrow : |
void gwy_data_field_filter_laplacian (GwyDataField *data_field, gint ulcol, gint ulrow, gint brcol, gint brrow);
data_field : | |
ulcol : | |
ulrow : | |
brcol : | |
brrow : |
void gwy_data_field_filter_sobel (GwyDataField *data_field, GtkOrientation orientation, gint ulcol, gint ulrow, gint brcol, gint brrow);
data_field : | |
orientation : | |
ulcol : | |
ulrow : | |
brcol : | |
brrow : |
void gwy_data_field_filter_prewitt (GwyDataField *data_field, GtkOrientation orientation, gint ulcol, gint ulrow, gint brcol, gint brrow);
data_field : | |
orientation : | |
ulcol : | |
ulrow : | |
brcol : | |
brrow : |
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