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Diffstat (limited to 'env/lib/python3.10/site-packages/PIL/ImageStat.py')
-rw-r--r-- | env/lib/python3.10/site-packages/PIL/ImageStat.py | 147 |
1 files changed, 0 insertions, 147 deletions
diff --git a/env/lib/python3.10/site-packages/PIL/ImageStat.py b/env/lib/python3.10/site-packages/PIL/ImageStat.py deleted file mode 100644 index 1baef7d..0000000 --- a/env/lib/python3.10/site-packages/PIL/ImageStat.py +++ /dev/null @@ -1,147 +0,0 @@ -# -# The Python Imaging Library. -# $Id$ -# -# global image statistics -# -# History: -# 1996-04-05 fl Created -# 1997-05-21 fl Added mask; added rms, var, stddev attributes -# 1997-08-05 fl Added median -# 1998-07-05 hk Fixed integer overflow error -# -# Notes: -# This class shows how to implement delayed evaluation of attributes. -# To get a certain value, simply access the corresponding attribute. -# The __getattr__ dispatcher takes care of the rest. -# -# Copyright (c) Secret Labs AB 1997. -# Copyright (c) Fredrik Lundh 1996-97. -# -# See the README file for information on usage and redistribution. -# - -import functools -import math -import operator - - -class Stat: - def __init__(self, image_or_list, mask=None): - try: - if mask: - self.h = image_or_list.histogram(mask) - else: - self.h = image_or_list.histogram() - except AttributeError: - self.h = image_or_list # assume it to be a histogram list - if not isinstance(self.h, list): - raise TypeError("first argument must be image or list") - self.bands = list(range(len(self.h) // 256)) - - def __getattr__(self, id): - """Calculate missing attribute""" - if id[:4] == "_get": - raise AttributeError(id) - # calculate missing attribute - v = getattr(self, "_get" + id)() - setattr(self, id, v) - return v - - def _getextrema(self): - """Get min/max values for each band in the image""" - - def minmax(histogram): - n = 255 - x = 0 - for i in range(256): - if histogram[i]: - n = min(n, i) - x = max(x, i) - return n, x # returns (255, 0) if there's no data in the histogram - - v = [] - for i in range(0, len(self.h), 256): - v.append(minmax(self.h[i:])) - return v - - def _getcount(self): - """Get total number of pixels in each layer""" - - v = [] - for i in range(0, len(self.h), 256): - v.append(functools.reduce(operator.add, self.h[i : i + 256])) - return v - - def _getsum(self): - """Get sum of all pixels in each layer""" - - v = [] - for i in range(0, len(self.h), 256): - layer_sum = 0.0 - for j in range(256): - layer_sum += j * self.h[i + j] - v.append(layer_sum) - return v - - def _getsum2(self): - """Get squared sum of all pixels in each layer""" - - v = [] - for i in range(0, len(self.h), 256): - sum2 = 0.0 - for j in range(256): - sum2 += (j**2) * float(self.h[i + j]) - v.append(sum2) - return v - - def _getmean(self): - """Get average pixel level for each layer""" - - v = [] - for i in self.bands: - v.append(self.sum[i] / self.count[i]) - return v - - def _getmedian(self): - """Get median pixel level for each layer""" - - v = [] - for i in self.bands: - s = 0 - half = self.count[i] // 2 - b = i * 256 - for j in range(256): - s = s + self.h[b + j] - if s > half: - break - v.append(j) - return v - - def _getrms(self): - """Get RMS for each layer""" - - v = [] - for i in self.bands: - v.append(math.sqrt(self.sum2[i] / self.count[i])) - return v - - def _getvar(self): - """Get variance for each layer""" - - v = [] - for i in self.bands: - n = self.count[i] - v.append((self.sum2[i] - (self.sum[i] ** 2.0) / n) / n) - return v - - def _getstddev(self): - """Get standard deviation for each layer""" - - v = [] - for i in self.bands: - v.append(math.sqrt(self.var[i])) - return v - - -Global = Stat # compatibility |