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int size; /* the length of one side */
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long totsize; /* the Total number of data points */
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45
double *data[2]; /* Data structure containing real & complex values of FFT */
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struct Option *input_map, *output_map, *width, *threshold, *orientations;
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module = G_define_module();
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_("Zero-crossing \"edge detection\" raster "
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"function for image processing.");