/
func.go
100 lines (87 loc) · 2.19 KB
/
func.go
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package main
//go:generate go install github.com/rakyll/statik@latest
//go:generate statik -src=data -f -include "*"
import (
"context"
"image"
"image/jpeg"
"io"
"io/ioutil"
"log"
_ "func/statik"
pigo "github.com/esimov/pigo/core"
fdk "github.com/fnproject/fdk-go"
"github.com/nfnt/resize"
"github.com/rakyll/statik/fs"
"golang.org/x/image/draw"
)
var (
maskImg image.Image
classifier *pigo.Pigo
)
func init() {
statikFS, err := fs.New()
if err != nil {
log.Fatal(err)
}
f, err := statikFS.Open("/mask.png")
if err != nil {
log.Fatal("cannot open mask.png:", err)
}
defer f.Close()
maskImg, _, err = image.Decode(f)
if err != nil {
log.Fatal("cannot decode mask.png:", err)
}
f, err = statikFS.Open("/facefinder")
if err != nil {
log.Fatal("cannot open facefinder:", err)
}
defer f.Close()
b, err := ioutil.ReadAll(f)
if err != nil {
log.Fatal("cannot read facefinder:", err)
}
pigo := pigo.NewPigo()
classifier, err = pigo.Unpack(b)
if err != nil {
log.Fatal("cannot unpack facefinder:", err)
}
}
func main() {
fdk.Handle(fdk.HandlerFunc(func(ctx context.Context, in io.Reader, out io.Writer) {
img, _, err := image.Decode(in)
if err != nil {
log.Fatal("cannot decode input image:", err)
return
}
bounds := img.Bounds().Max
param := pigo.CascadeParams{
MinSize: 20,
MaxSize: 2000,
ShiftFactor: 0.1,
ScaleFactor: 1.1,
ImageParams: pigo.ImageParams{
Pixels: pigo.RgbToGrayscale(pigo.ImgToNRGBA(img)),
Rows: bounds.Y,
Cols: bounds.X,
Dim: bounds.X,
},
}
faces := classifier.RunCascade(param, 0)
faces = classifier.ClusterDetections(faces, 0.18)
canvas := image.NewRGBA(img.Bounds())
draw.Draw(canvas, img.Bounds(), img, image.Point{0, 0}, draw.Over)
for _, face := range faces {
pt := image.Point{face.Col - face.Scale/2, face.Row - face.Scale/2}
fimg := resize.Resize(uint(face.Scale), uint(face.Scale), maskImg, resize.NearestNeighbor)
log.Println(pt.X, pt.Y, face.Scale)
draw.Copy(canvas, pt, fimg, fimg.Bounds(), draw.Over, nil)
}
err = jpeg.Encode(out, canvas, &jpeg.Options{Quality: 100})
if err != nil {
log.Fatal("cannot encode output image:", err)
return
}
}))
}