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STY: reformat the filling-in of the Euler LUT

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This commit is contained in:
Evgeni Burovski
2016-01-31 13:15:35 +00:00
parent 85f46c6fe8
commit c4c95ae4bc
1 changed files with 11 additions and 135 deletions
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skimage/morphology/_skel.pyx
+11 -135
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@@ -34,7 +34,7 @@ from __future__ import division, print_function, absolute_import
from libc.string cimport memcpy
import numpy as np
from numpy cimport npy_intp, npy_uint8
from numpy cimport npy_intp, npy_uint8, ndarray
cimport cython
ctypedef npy_uint8 pixel_type
@@ -233,140 +233,16 @@ def fill_Euler_LUT():
This is column $\delta G_{26}$ of Table 2 of [Lee94]_.
"""
LUT = np.zeros(256, dtype=np.intc)
LUT[1] = 1
LUT[3] = -1
LUT[5] = -1
LUT[7] = 1
LUT[9] = -3
LUT[11] = -1
LUT[13] = -1
LUT[15] = 1
LUT[17] = -1
LUT[19] = 1
LUT[21] = 1
LUT[23] = -1
LUT[25] = 3
LUT[27] = 1
LUT[29] = 1
LUT[31] = -1
LUT[33] = -3
LUT[35] = -1
LUT[37] = 3
LUT[39] = 1
LUT[41] = 1
LUT[43] = -1
LUT[45] = 3
LUT[47] = 1
LUT[49] = -1
LUT[51] = 1
LUT[53] = 1
LUT[55] = -1
LUT[57] = 3
LUT[59] = 1
LUT[61] = 1
LUT[63] = -1
LUT[65] = -3
LUT[67] = 3
LUT[69] = -1
LUT[71] = 1
LUT[73] = 1
LUT[75] = 3
LUT[77] = -1
LUT[79] = 1
LUT[81] = -1
LUT[83] = 1
LUT[85] = 1
LUT[87] = -1
LUT[89] = 3
LUT[91] = 1
LUT[93] = 1
LUT[95] = -1
LUT[97] = 1
LUT[99] = 3
LUT[101] = 3
LUT[103] = 1
LUT[105] = 5
LUT[107] = 3
LUT[109] = 3
LUT[111] = 1
LUT[113] = -1
LUT[115] = 1
LUT[117] = 1
LUT[119] = -1
LUT[121] = 3
LUT[123] = 1
LUT[125] = 1
LUT[127] = -1
LUT[129] = -7
LUT[131] = -1
LUT[133] = -1
LUT[135] = 1
LUT[137] = -3
LUT[139] = -1
LUT[141] = -1
LUT[143] = 1
LUT[145] = -1
LUT[147] = 1
LUT[149] = 1
LUT[151] = -1
LUT[153] = 3
LUT[155] = 1
LUT[157] = 1
LUT[159] = -1
LUT[161] = -3
LUT[163] = -1
LUT[165] = 3
LUT[167] = 1
LUT[169] = 1
LUT[171] = -1
LUT[173] = 3
LUT[175] = 1
LUT[177] = -1
LUT[179] = 1
LUT[181] = 1
LUT[183] = -1
LUT[185] = 3
LUT[187] = 1
LUT[189] = 1
LUT[191] = -1
LUT[193] = -3
LUT[195] = 3
LUT[197] = -1
LUT[199] = 1
LUT[201] = 1
LUT[203] = 3
LUT[205] = -1
LUT[207] = 1
LUT[209] = -1
LUT[211] = 1
LUT[213] = 1
LUT[215] = -1
LUT[217] = 3
LUT[219] = 1
LUT[221] = 1
LUT[223] = -1
LUT[225] = 1
LUT[227] = 3
LUT[229] = 3
LUT[231] = 1
LUT[233] = 5
LUT[235] = 3
LUT[237] = 3
LUT[239] = 1
LUT[241] = -1
LUT[243] = 1
LUT[245] = 1
LUT[247] = -1
LUT[249] = 3
LUT[251] = 1
LUT[253] = 1
LUT[255] = -1
cdef int arr[128]
arr[:] = [1, -1, -1, 1, -3, -1, -1, 1, -1, 1, 1, -1, 3, 1, 1, -1, -3, -1,
3, 1, 1, -1, 3, 1, -1, 1, 1, -1, 3, 1, 1, -1, -3, 3, -1, 1, 1,
3, -1, 1, -1, 1, 1, -1, 3, 1, 1, -1, 1, 3, 3, 1, 5, 3, 3, 1,
-1, 1, 1, -1, 3, 1, 1, -1, -7, -1, -1, 1, -3, -1, -1, 1, -1,
1, 1, -1, 3, 1, 1, -1, -3, -1, 3, 1, 1, -1, 3, 1, -1, 1, 1,
-1, 3, 1, 1, -1, -3, 3, -1, 1, 1, 3, -1, 1, -1, 1, 1, -1, 3,
1, 1, -1, 1, 3, 3, 1, 5, 3, 3, 1, -1, 1, 1, -1, 3, 1, 1, -1]
cdef ndarray LUT = np.zeros(256, dtype=np.intc)
LUT[1::2] = arr
return LUT
cdef int[::1] LUT = fill_Euler_LUT()