Package convolve :: Module iraf_frame

Module iraf_frame

Functions

frame_nearest(a, shape, cval=None)
frame_nearest creates an oversized copy of 'a' with new 'shape' and the contents of 'a' in the center.

source code

frame_reflect(a, shape, cval=None)
frame_reflect creates an oversized copy of 'a' with new 'shape' and the contents of 'a' in the center.

source code

frame_wrap(a, shape, cval=None)
frame_wrap creates an oversized copy of 'a' with new 'shape' and the contents of 'a' in the center.

source code

frame_constant(a, shape, cval=0)
frame_nearest creates an oversized copy of 'a' with new 'shape' and the contents of 'a' in the center.

source code

frame(a, shape, mode='nearest', cval=0.0)
frame creates an oversized copy of 'a' with new 'shape', with extra pixels being supplied according to IRAF boundary mode, 'mode'. source code

unframe(a, shape)
unframe extracts the center slice of framed array 'a' which had 'shape' prior to framing.

source code

test()

source code

Variables

[hide private]

_frame_dispatch = {"nearest": frame_nearest, "reflect": frame_...

__package__ = 'convolve'

Imports: num

Function Details

[hide private]

frame_nearest(a, shape, cval=None)

source code

frame_nearest creates an oversized copy of 'a' with new 'shape' and the contents of 'a' in the center. The boundary pixels are copied from the nearest edge pixel in 'a'.

>>> a = num.arange(16)
>>> a.shape=(4,4)
>>> frame_nearest(a, (8,8))
array([[ 0,  0,  0,  1,  2,  3,  3,  3],
       [ 0,  0,  0,  1,  2,  3,  3,  3],
       [ 0,  0,  0,  1,  2,  3,  3,  3],
       [ 4,  4,  4,  5,  6,  7,  7,  7],
       [ 8,  8,  8,  9, 10, 11, 11, 11],
       [12, 12, 12, 13, 14, 15, 15, 15],
       [12, 12, 12, 13, 14, 15, 15, 15],
       [12, 12, 12, 13, 14, 15, 15, 15]])

frame_reflect(a, shape, cval=None)

source code

frame_reflect creates an oversized copy of 'a' with new 'shape' and the contents of 'a' in the center. The boundary pixels are reflected from the nearest edge pixels in 'a'.

>>> a = num.arange(16)
>>> a.shape = (4,4)
>>> frame_reflect(a, (8,8))
array([[ 5,  4,  4,  5,  6,  7,  7,  6],
       [ 1,  0,  0,  1,  2,  3,  3,  2],
       [ 1,  0,  0,  1,  2,  3,  3,  2],
       [ 5,  4,  4,  5,  6,  7,  7,  6],
       [ 9,  8,  8,  9, 10, 11, 11, 10],
       [13, 12, 12, 13, 14, 15, 15, 14],
       [13, 12, 12, 13, 14, 15, 15, 14],
       [ 9,  8,  8,  9, 10, 11, 11, 10]])

frame_wrap(a, shape, cval=None)

source code

frame_wrap creates an oversized copy of 'a' with new 'shape' and the contents of 'a' in the center. The boundary pixels are wrapped around to the opposite edge pixels in 'a'.

>>> a = num.arange(16)
>>> a.shape=(4,4)
>>> frame_wrap(a, (8,8))
array([[10, 11,  8,  9, 10, 11,  8,  9],
       [14, 15, 12, 13, 14, 15, 12, 13],
       [ 2,  3,  0,  1,  2,  3,  0,  1],
       [ 6,  7,  4,  5,  6,  7,  4,  5],
       [10, 11,  8,  9, 10, 11,  8,  9],
       [14, 15, 12, 13, 14, 15, 12, 13],
       [ 2,  3,  0,  1,  2,  3,  0,  1],
       [ 6,  7,  4,  5,  6,  7,  4,  5]])

frame_constant(a, shape, cval=0)

source code

frame_nearest creates an oversized copy of 'a' with new 'shape' and the contents of 'a' in the center. The boundary pixels are copied from the nearest edge pixel in 'a'.

>>> a = num.arange(16)
>>> a.shape=(4,4)
>>> frame_constant(a, (8,8), cval=42)
array([[42, 42, 42, 42, 42, 42, 42, 42],
       [42, 42, 42, 42, 42, 42, 42, 42],
       [42, 42,  0,  1,  2,  3, 42, 42],
       [42, 42,  4,  5,  6,  7, 42, 42],
       [42, 42,  8,  9, 10, 11, 42, 42],
       [42, 42, 12, 13, 14, 15, 42, 42],
       [42, 42, 42, 42, 42, 42, 42, 42],
       [42, 42, 42, 42, 42, 42, 42, 42]])

Variables Details

[hide private]

_frame_dispatch

Value:

{"nearest": frame_nearest, "reflect": frame_reflect, "wrap": frame_wra
p, "constant": frame_constant}