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͜Μʹͪʂ
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ຊޠೖྗࢼݧ
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Aaron Patterson
@tenderlove
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GitHub
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ko1: ϓϩάϥϛϯάΛ͍ͯͯ͠ʮ͓͓ɺ
ੌ͍ίʔυ͕ॻ͚ͨʯʮ͜Εੌ͍ͷ
Λ࡞ͬͯ͠·ͬͨʯͷΑ͏ͳܦݧͳͲ
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Me: ʮੌ͍ίʔυʯ
͍͍ͬͯͬͨԿͩΖ͏
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;ͨͭͷҙຯ
ڪΖ͍͠ / ා͍
ૉΒ͍͠ / ྑ͍
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ೋͭͷτϐοΫ
ڪΖ͍͠ / ා͍:
PHP
ૉΒ͍͠ / ྑ͍:
Computer Vision
ൿີ
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ੌ͍ίʔυ
ૉΒ͍͠ / ྑ͍
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ίϯϐϡʔλ
Ϗδϣϯ
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ΨϥΫλ͕
͍ͬͺ͍
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Magic The
Gathering (MtG)ͱ
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Collectible Card
Game
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ࢲͷ (Χʔυͷத)
• Too many cards
• Don’t know what they do
• Are they worth any money?
• Plus many more!
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ίϯϐϡʔλʔʹ߹͏
Έ͍ͨ
Seems like a job for computers!
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ࢲͷղܾ
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ਓೳ
Χϝϥ
ೣ!
Ruby!
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High Level Process
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ࣸਅΛࡱΔ
ΧʔυΛൈ͚Δ
ΧʔυΛ֬ೝ͢Δ
σʔλΛอଘ͢Δ
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Χʔυͷೝࣝ
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श
ͬͨ
ਪଌ
ϓϩϯϓτ
ڭ͑Δ
ίʔύε
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श
ͬͨ
ਪଌ
ϓϩϯϓτ
ڭ͑Δ
ίʔύ
ε
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ਓೳ
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σʔλɹϞσϧ
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Χʔυͷใ
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ࣸਅ
໊લ
ਓؾ
ηοτ
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image belongs_to(:card)
card has_one(:image)
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image belongs_to(:card)
card has_many(:images)
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image habtm(:cards)
card habmt(:image)
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શσʔλϞσϧ
Cards
Images
Hashes
habtm
has_many
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ίʔύεͷੜ
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Executor Pool
class ThreadExecutor
def initialize size
@queue = Queue.new
@size = size
@pool = size.times.map { |i|
Thread.new { while job = @queue.pop; job.run end }
}
end
def execute job = Proc.new
promise = Promise.new job
@queue << promise
promise
end
def shutdown
@size.times { @queue << nil }
@pool.each(&:join)
end
end
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Queue up work
promise = @executor.execute do
@http_pool.with_connection do |conn|
uri = URI 'http://gatherer.wizards.com/Pages/Default.aspx'
response = conn.request uri
# save the response
end
end
# some time later
promise.value
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Me Wizards
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1.6GB
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http://mtgjson.com/
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ॻ͘લʹ
άʔάϧͨ͠ํ͕͍͍
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Χʔυͷೝࣝ
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֮తϋογϡ
libphash (gem install phasion)
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11998341215223291070 12079686925145871551
Reference Scanned
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ϋϛϯάڑ
require 'phashion'
left = Phashion.image_hash_for "a.jpg"
right = Phashion.image_hash_for "b.jpg"
p Phashion.hamming_distance left, right # => 8
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5622372658725034411 12079686925145871551
Reference Scanned
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ϋϛϯάڑ
require 'phashion'
left = Phashion.image_hash_for "c.jpg"
right = Phashion.image_hash_for "b.jpg"
p Phashion.hamming_distance left, right # => 28
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ϋογϡΛՃ͢Δͱ
͕ࣝ૿͑Δ
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ϋʔυΣΞ
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ιϑτΣΞ
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OpenCV
https://github.com/ruby-opencv/ruby-opencv
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ࡱͬͨࣸਅ
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ཉ͍͠Πϝʔδ
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Χʔυͷൈ͖ํ
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؆୯ͳ8ஈ֊͚ͩ!*
* ؆୯͡Όͳ͍ɺଟ
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લॲཧ
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άϨʔεέʔϧ
gray = OpenCV.BGR2GRAY img
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Τοδݕग़
canny_img = gray.canny @thresh, @thresh
http://en.wikipedia.org/wiki/Canny_edge_detector
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ྠֲΛݟ͚ͭΔ
contours = []
contour_node = processed.find_contours(
:mode => OpenCV::CV_RETR_TREE,
:method => OpenCV::CV_CHAIN_APPROX_SIMPLE)
while contour_node
unless contour_node.hole?
contours << contour_node
end
contour_node = contour_node.h_next
end
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ྠֲ
݀
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Ұ൪େ͖ͳྠֲ
max = contours.max_by { |c|
c.contour_area
}
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ଟ֯ܗΛݟ͚ͭΔ
approx = max.approx_poly(:method => :dp,
:recursive => true,
:accuracy => 0.02 * peri)
x = approx.convex_hull2.to_a
clockwise_points = clockwise x.reverse
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ಁࢹมͷߦྻ
to = [
OpenCV::CvPoint2D32f.new(0, 0),
OpenCV::CvPoint2D32f.new(width, 0),
OpenCV::CvPoint2D32f.new(width, height),
OpenCV::CvPoint2D32f.new(0, height),
]
from = polygon_points
transform = OpenCV::CvMat.get_perspective_transform(from, to)
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ΠϝʔδΛม͢Δ
new_img = img.warp_perspective transform
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ڥք࠲ඪΛઃఆ͢Δ
new_img.set_roi OpenCV::CvRect.new(0, 0, width, height)
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It’s Just That Easy!
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ϢʔβʔΠϯλʔϑΣΠε
ΧϝϥͰ
ࡱͬͨ
Πϝʔδ
ਪଌ
#1
ਪଌ
#2
ਪଌ
#3
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Կ͕͋Δʁ
Card.joins(:images)
.where('images.type' => 'UserImage')
.group('cards.name')
.count
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Ͳͷ͙Β͍ྑ͍ʁ
Card.joins(:images) # best
.where('images.type' => 'UserImage')
.order('rating desc').first
Card.joins(:images) # worst
.where('images.type' => 'UserImage')
.order('rating asc').first
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࠷ߴ:
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࠷:
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ϓϩδΣΫτͷ
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যͷ࣌ؒ
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ࣦഊͷ࣌
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ֆࣅͯΔ
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No content
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अຐೣ
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ར
ઃఆ؆୯
ඞཁϋʔυΣΞ͋·Γͳ͍
͍҆
ΩϟϦϒϨʔτ͠ͳ͍
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ܽ
ෳࡶͳιϑτΣΞ
࿑ಇ
֬ೝͷ͞
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ࠓޙͷ׆ಈ
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ࣗಈԽ
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ੌ͍ίʔυ
ڪΖ͍͠ / ා͍
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PHP + Ruby
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Phuby (ϑʔϏΟ)
https://github.com/tenderlove/phuby
એ
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Examples
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PHPͷ
ΦϒδΣΫτΛ͏
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ࣈ
require 'phuby'
Phuby::Runtime.php do |runtime|
runtime.eval "$v = strlen('PHP INSIDE OF RUBY');"
puts runtime['v'] # => 18
end
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จࣈྻ
require 'phuby'
Phuby::Runtime.php do |runtime|
runtime.eval "$name = 'Aaron';"
puts runtime['name'] # => Aaron
end
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ྻ
require 'phuby'
Phuby::Runtime.php do |runtime|
runtime.eval "$cars = array('Toyota', 'Honda', 'BMW');"
p runtime['cars'][0] # => Toyota
p runtime['cars'][1] # => Honda
p runtime['cars'][2] # => BMW
end
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࿈ྻ
require 'phuby'
Phuby::Runtime.php do |runtime|
runtime.eval "$e = array('foo' => 'bar', 'bar' => 'baz');"
p runtime['e']['foo'] # => 'bar'
p runtime['e']['bar'] # => 'baz'
end
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Rubyͷ
ΦϒδΣΫτΛ͏
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Objects
require 'phuby'
class RubyKaigi
def where
puts "౦ژ"
end
end
Phuby::Runtime.php do |runtime|
runtime['kaigi'] = RubyKaigi.new
runtime.eval("$kaigi->where();") # => ౦ژ
end
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ͳͥʁ
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͍͍͔Β
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scientists were so
preoccupied with
whether or not they could
that they didn't stop to
think if they should.
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ϓϩάϥϜͷମܕ
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Runtime Proxy
Object Map
Ruby Object Proxy
PHP Object Proxy
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Wrapper
Access PHP Objects
Ruby C PHP
Object
Map
Ruby
Proxy
PHP
Runtime
Object
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Wrapper
Access Ruby Objects
Ruby C PHP
Object
Map
Ruby
Proxy
PHP
Runtime
Object
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ϓϩδΣΫτͷ
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PHPΛ
ίϯύΠϧ͢Δ
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GC
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άϩʔόϧͷม
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require 'phuby'
require 'openssl'
p OpenSSL::Cipher.ciphers # => ["AES-128-CBC", "AES-128-CBC-HMAC-SHA1", ... ]
Phuby::Runtime.php do |runtime|
runtime.eval("$hi = 'Hello World';")
end
p OpenSSL::Cipher.ciphers # => []
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Solution: fork
require 'phuby'
require 'openssl'
p OpenSSL::Cipher.ciphers # => ["AES-128-CBC", "AES-128-CBC-HMAC-SHA1", ... ]
Process.waitpid fork {
Phuby::Runtime.php do |runtime|
runtime.eval("$hi = 'Hello World';")
end
}
p OpenSSL::Cipher.ciphers # => ["AES-128-CBC", "AES-128-CBC-HMAC-SHA1", ... ]
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Rails Support
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PHP templates
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Πϯελϯεม
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ActiveRecord͑·͢
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How much would
you pay for this?
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200ԁ?
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250ԁ?
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https://github.com/
tenderlove/phuby
FREE!
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ൿີͷτϐοΫ
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ko1 said this is a tech
conference, so you don’t
have to tell any jokes
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So I won’t tell any
jokes.
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ੌ͍ίʔυ
How does it work?
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Homeopathic
Optimizations
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Homeopathy
ͱʁ
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رऍɻ
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͗͢Δʂ
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Modern advocates of homeopathy
have proposed a concept of "water
memory", according to which water
"remembers" the substances
mixed in
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ਫ
هԱग़དྷ·͢
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ۭന
هԱ͢Δࣄ͕Ͱ͖Δʁ
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YES!
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σϞͷ࣌ؒ!
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Ͳ͏ͬͯ
ಈ͍ͯΔʁ
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VM هԱ͢Δ
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ͦΕۭന͡Όͳ
ͯ͘ɺهԱͩɻ
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ଞͷಛ
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ར
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ߴԽ
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"No code is faster
than no code"
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رऍ͞ΕΕ͞ΕΔ΄Ͳ
ϓϩάϥϜΑΓ͘ͳ Δ
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ҡ࣋
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ίʔυͳ͍͔Β
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THANK YOU!!!
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࣭ʁ