👩🏾‍⚖️ ™️ 🌡️ Cómo arruiné la productividad de la oficina con el Slack Face-Swap Bot 🐫 🤛🏿 🚏

— @Malakhor9000

, , «» , Slack- .

«» — , Smite. , , . @Chrisbot. .

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.

image image/draw Go, , . №1.

, Slack- Go , Google. Go Slack , , , , Slack. №2.

, — . golang face detect — StackOverflow go-opencv. , . №3.

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go-opencv. , opencv Go, Image Rectangle, , .

, opencv.FromImage, image.Image opencv . , opencv.LoadImage, , . Slack.

, XML- Haar , , . facefinder, :

package facefinder

import (
  "image"

  "github.com/lazywei/go-opencv/opencv"
)

var faceCascade *opencv.HaarCascade

type Finder struct {
  cascade *opencv.HaarCascade
}

func NewFinder(xml string) *Finder {
  return &Finder{
    cascade: opencv.LoadHaarClassifierCascade(xml),
  }
}

func (f *Finder) Detect(i image.Image) []image.Rectangle {
  var output []image.Rectangle

  faces := f.cascade.DetectObjects(opencv.FromImage(i))
  for _, face := range faces {
    output = append(output, image.Rectangle{
      image.Point{face.X(), face.Y()},
      image.Point{face.X() + face.Width(), face.Y() + face.Height()},
    })
  }

  return output
}

, :

imageReader, _ := os.Open(imageFile)
baseImage, _, _ := image.Decode(imageReader)

finder := facefinder.NewFinder(haarCascadeFilepath)
faces := finder.Detect(baseImage)

for _, face := range faces {
  // [...]
}

! , . , _ bin.

func loadImage(file string) image.Image {
  reader, err := os.Open(file)
  if err != nil {
    log.Fatalf("error loading %s: %s", file, err)
  }
  img, _, err := image.Decode(reader)
  if err != nil {
    log.Fatalf("error loading %s: %s", file, err)
  }
  return img
}

- :

baseImage := loadImage(imageFile)
chrisFace := loadImage(chrisFaceFile)

bounds := baseImage.Bounds()

finder := facefinder.NewFinder(haarCascadeFilepath)
faces := finder.Detect(baseImage)

// Convert image.Image to a mutable image.ImageRGBA
canvas := image.NewRGBA(bounds)
draw.Draw(canvas, bounds, baseImage, bounds.Min, draw.Src)

for _, face := range faces {
  draw.Draw(
    canvas,
    face,
    chrisFace,
    bounds.Min,
    draw.Src,
  )
}

, , !

, . ! . PNG , . draw.Over draw.Draw. draw.Src !

imagen

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, . , - . , , «», - . , image.Rectangle , «» 30%.

, « » , «» . , disintegration/imaging, imaging.Fit , , , . , , .

:

for _, face := range faces {
  //    30%
  rect := rectMargin(30.0, face)

  //     (50% ,    )
  newFace := chrisFaces.Random()

  chrisFace := imaging.Fit(newFace, rect.Dx(), rect.Dy(), imaging.Lanczos)

  draw.Draw(
    canvas,
    rect,
    chrisFace,
    bounds.Min,
    draw.Over,
  )
}

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: - .

Slack

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Google.

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. , , , . ! - :

if len(faces) == 0 {
  //             1/3 
  //   
  face := imaging.Resize(
    chrisFaces[0],
    bounds.Dx()/3,
    0,
    imaging.Lanczos,
  )

  face_bounds := face.Bounds()

  draw.Draw(
    canvas,
    bounds,
    face,
    //  ,       ,     
    //   ,        ,   
    //       
    bounds.Min.Add(image.Pt(
      -bounds.Max/2+face_bounds.Max.X/2,
      -bounds.Max.Y+int(float64(face_bounds.Max.Y)/1.9),
    )),
    draw.Over,
  )
}