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- #finesharp.py - finesharp module for VapourSynth
- #original author : Didee (http://forum.doom9.org/showthread.php?t=166082)
- # requirement: RemoveGrain.dll, Repair.dll
- # VapourSynth r19 or later
- import vapoursynth as vs
- class InvalidArgument(Exception):
- def __init__(self, value):
- self.value = value
- def __str__(self):
- return repr(self.value)
- def spline(x, coordinates):
- def get_matrix(px, py, l):
- matrix = []
- matrix.append([(i == 0) * 1.0 for i in range(l + 1)])
- for i in range(1, l - 1):
- p = [0 for t in range(l + 1)]
- p[i - 1] = px[i] - px[i - 1]
- p[i] = 2 * (px[i + 1] - px[i - 1])
- p[i + 1] = px[i + 1] - px[i]
- p[l] = 6 * (((py[i + 1] - py[i]) / p[i + 1]) - (py[i] - py[i - 1]) / p[i - 1])
- matrix.append(p)
- matrix.append([(i == l - 1) * 1.0 for i in range(l + 1)])
- return matrix
- def equation(matrix, dim):
- for i in range(dim):
- num = matrix[i][i]
- for j in range(dim + 1):
- matrix[i][j] /= num
- for j in range(dim):
- if i != j:
- a = matrix[j][i]
- for k in range(i, dim + 1):
- matrix[j][k] -= a * matrix[i][k]
- if not isinstance(coordinates, dict):
- raise TypeError('coordinates must be a dict')
- length = len(coordinates)
- if length < 3:
- raise InvalidArgument('coordinates require at least three pairs')
- px = [key for key in coordinates.keys()]
- py = [val for val in coordinates.values()]
- matrix = get_matrix(px, py, length)
- equation(matrix, length)
- for i in range(length + 1):
- if x >= px[i] and x <= px[i + 1]:
- break
- j = i + 1
- h = px[j] - px[i]
- s = matrix[j][length] * (x - px[i]) ** 3
- s -= matrix[i][length] * (x - px[j]) ** 3
- s /= 6 * h
- s += (py[j] / h - h * matrix[j][length] / 6) * (x - px[i])
- s -= (py[i] / h - h * matrix[i][length] / 6) * (x - px[j])
- return s
- def clamp(minimum, x, maximum):
- return int(max(minimum, min(round(x), maximum)))
- class FineSharp(object):
- def __init__(self):
- self.core = vs.get_core()
- self.rgrain = self.core.avs.RemoveGrain
- self.repair = self.core.avs.Repair
- self.std = self.core.std
- self.point = self.core.resize.Point
- self.max = 255
- self.mid = 128
- def mt_adddiff(self, c1, c2, planes=[0]):
- expr = ('x y + {mid} -').format(mid=self.mid)
- expr = [(i in planes) * expr for i in range(3)]
- return self.std.Expr([c1, c2], expr)
- def mt_makediff(self, c1, c2, planes=[0]):
- expr = ('x y - {mid} +').format(mid=self.mid)
- expr = [(i in planes) * expr for i in range(3)]
- return self.std.Expr([c1, c2], expr)
- def sharpen(self, clip, mode=1, sstr=2.0, cstr=None, xstr=0.19, lstr=1.49,
- pstr=1.272, ldmp=None):
- if clip.format.color_family != vs.YUV or clip.format.bits_per_sample != 8:
- raise InvalidArgument('clip is not 8bit YUV.')
- mode = int(mode)
- if abs(mode) > 3 or mode == 0:
- raise InvalidArgument('mode must be 1, 2, 3, -1, -2 or -3.')
- sstr = float(sstr)
- if sstr < 0.0:
- raise InvalidArgument('sstr must be larger than zero.')
- if cstr is None:
- cstr = spline(sstr, {0:0, 0.5:0.1, 1:0.6, 2:0.9, 2.5:1, 3:1.09,
- 3.5:1.15, 4:1.19, 8:1.249, 255:1.5})
- if mode > 0:
- cstr **= 0.8
- cstr = float(cstr)
- xstr = float(xstr)
- if xstr < 0.0:
- raise InvalidArgument('xstr must be larger than zero.')
- lstr = float(lstr)
- pstr = float(pstr)
- if ldmp is None:
- ldmp = sstr + 0.1
- ldmp = float(ldmp)
- rg = 20 - (mode > 0) * 9
- if sstr < 0.01 and cstr < 0.01 and xstr < 0.01:
- return clip
- orig = None
- if clip.format.id != vs.YUV420P8:
- orig = clip
- clip = self.point(clip, format=vs.YUV420P8)
- if abs(mode) == 1:
- c2 = self.rgrain(self.rgrain(clip, 11, -1), 4, -1)
- else:
- c2 = self.rgrain(self.rgrain(clip, 4, -1), 11, -1)
- if abs(mode) == 3:
- c2 = self.rgrain(c2, 4, -1)
- expr = lambda x, y:(((((abs(x - y) / lstr) ** (1 / pstr)) * sstr) *
- ((x - y) / (abs(x - y) + 0.001))) *
- (((x - y) ** 2) / (((x - y) ** 2) + ldmp)) + 128)
- diff = self.std.Lut2([clip, c2], function=expr, planes=0)
- shrp = clip
- if sstr >= 0.01:
- shrp = self.mt_adddiff(shrp, diff)
- if cstr >= 0.01:
- diff = self.std.Lut(diff, planes=0,
- function=lambda x: (x - self.mid) * cstr + self.mid)
- diff = self.rgrain(diff, rg, -1)
- shrp = self.mt_makediff(shrp, diff)
- if xstr >= 0.01:
- xyshrp = self.std.Lut2([shrp, self.rgrain(shrp, 20, -1)], planes=0,
- function=lambda x, y: x + (x - y) * 9.9)
- rpshrp = self.repair(xyshrp, shrp, 12, 0)
- shrp = self.std.Merge([rpshrp, shrp], [1 - xstr, 1.0, 1.0])
- if orig is not None:
- shrp = self.std.ShufflePlanes([shrp, orig], [0, 1, 2], vs.YUV)
- return shrp
- def usage(self):
- usage = '''
- Small and relatively fast realtime-sharpening function, for 1080p,
- or after scaling 720p -> 1080p during playback
- (to make 720p look more like being 1080p)
- It's a generic sharpener. Only for good quality sources!
- (If the source is crap, FineSharp will happily sharpen the crap.) ;)
- Noise/grain will be enhanced, too. The method is GENERIC.
- Modus operandi: A basic nonlinear sharpening method is performed,
- then the *blurred* sharp-difference gets subtracted again.
- sharpen(clip, mode=1, sstr=2.0, cstr=None, xstr=0.19, lstr=1.49,
- pstr=1.272, ldmp=None)
- mode: 1 to 3, weakest to strongest. When negative -1 to -3,
- a broader kernel for equalisation is used.
- sstr: strength of sharpening, 0.0 up to ??
- cstr: strength of equalisation, 0.0 to ? 2.0 ?
- (recomm. 0.5 to 1.25, default AUTO)
- xstr: strength of XSharpen-style final sharpening, 0.0 to 1.0
- (but, better don't go beyond 0.249 ...)
- lstr: modifier for non-linear sharpening
- pstr: exponent for non-linear sharpening
- ldmp: "low damp", to not overenhance very small differences
- (noise coming out of flat areas, default sstr+1)
- '''
- return usage
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