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Contents
# require 'byebug'
# Functions that don't belong in Sqed proper
#
module SqedUtils
# @return [Array]
# like `[0,1,2]`
#
# @param frequency_stats [Array]
# like [1,2,3]
#
# @param width_factor [Float]
#
#
# @param max_width [Integer]
# required, the width of the image in question
#
# See tests. This code does a rough job of smoothing out boundaries that seem to
# be biased on one side or the other. Definitely could be refined to use a more
# weighted approach.
#
def self.corrected_frequency(frequency_stats, width_factor: 3.0, max_width: nil)
return frequency_stats if max_width.nil?
v0 = frequency_stats[0]
m = frequency_stats[1]
v2 = frequency_stats[2]
width_pct = (v2.to_f - v0.to_f) / max_width.to_f
return frequency_stats if (width_pct * 100) <= 2.0
a = (m - v0).abs
b = (v2 - m).abs
largest = (a > b ? a : b)
l = (m - b / 2)
l = 0 if l < 0
r = (m + a / 2)
r = max_width if r > max_width
c = a * width_factor
d = b * width_factor
[
c > largest ? l : v0,
m,
d > largest ? r : v2
]
end
end
Version data entries
17 entries across 17 versions & 1 rubygems