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Diffstat (limited to 'src/silx/image/marchingsquares/include/patterns.h')
| -rw-r--r-- | src/silx/image/marchingsquares/include/patterns.h | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/src/silx/image/marchingsquares/include/patterns.h b/src/silx/image/marchingsquares/include/patterns.h new file mode 100644 index 0000000..ff86cc1 --- /dev/null +++ b/src/silx/image/marchingsquares/include/patterns.h @@ -0,0 +1,89 @@ +# /*########################################################################## +# +# Copyright (c) 2018 European Synchrotron Radiation Facility +# +# Permission is hereby granted, free of charge, to any person obtaining a copy +# of this software and associated documentation files (the "Software"), to deal +# in the Software without restriction, including without limitation the rights +# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell +# copies of the Software, and to permit persons to whom the Software is +# furnished to do so, subject to the following conditions: +# +# The above copyright notice and this permission notice shall be included in +# all copies or substantial portions of the Software. +# +# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR +# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, +# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE +# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER +# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, +# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN +# THE SOFTWARE. +# +# ###########################################################################*/ + +/** This header provides static lookup table used by marching square + * algorithms. + */ + +#ifndef __MARCHINGSQUARE_PATTERNS_H__ +#define __MARCHINGSQUARE_PATTERNS_H__ + +/** + * Array containing pixel's coordinate linked together by an edge index. + */ +const unsigned char EDGE_TO_POINT[][2] = { + {0, 0}, + {1, 0}, + {1, 1}, + {0, 1}, + {0, 0} +}; + +/** + * Array of index containing 5 values: {nb, seg1b, seg2e, seg2b, seg2e} + * nb: number of segments (up to 2) + * seg1b: index of the start of the 1st edge + * seg1e: index of the end of the 1st edge + * seg2b: index of the start of the 2nd edge + * seg2e: index of the end of the 2nd edge + */ +const unsigned char CELL_TO_EDGE[][5] = { + {0, 0, 0, 0, 0}, // Case 0: 0000: nothing + {1, 0, 3, 0, 0}, // Case 1: 0001 + {1, 0, 1, 0, 0}, // Case 2: 0010 + {1, 1, 3, 0, 0}, // Case 3: 0011 + + {1, 1, 2, 0, 0}, // Case 4: 0100 + {2, 0, 1, 2, 3}, // Case 5: 0101 > ambiguous + {1, 0, 2, 0, 0}, // Case 6: 0110 + {1, 2, 3, 0, 0}, // Case 7: 0111 + + {1, 2, 3, 0, 0}, // Case 8: 1000 + {1, 0, 2, 0, 0}, // Case 9: 1001 + {2, 0, 3, 1, 2}, // Case 10: 1010 > ambiguous + {1, 1, 2, 0, 0}, // Case 11: 1011 + + {1, 1, 3, 0, 0}, // Case 12: 1100 + {1, 0, 1, 0, 0}, // Case 13: 1101 + {1, 0, 3, 0, 0}, // Case 14: 1110 + {0, 0, 0, 0, 0}, // Case 15: 1111 +}; + + +typedef struct coord_t { + short x; + short y; + + bool operator<(const coord_t& other) const { + if (y < other.y) { + return true; + } else if (y == other.y) { + return x < other.x; + } else { + return false; + } + } +} coord_t; + +#endif /*__MARCHINGSQUARE_PATTERNS_H__*/ |