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avoid double conv

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This commit is contained in:
Celogeek 2022-12-30 18:30:38 +01:00
parent 96c7d761ee
commit 8ede48431c
Signed by: celogeek
GPG Key ID: E6B7BDCFC446233A
1 changed files with 7 additions and 7 deletions
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14
internal/image-converter/core.go
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@ -11,21 +11,21 @@ import (
"golang.org/x/image/draw" "golang.org/x/image/draw"
) )
var AlgoGray = map[string]func(color.Color) color.Color{ var AlgoGray = map[string]func(color.Color) color.Gray{
"default": func(c color.Color) color.Color { "default": func(c color.Color) color.Gray {
return color.GrayModel.Convert(c) return color.GrayModel.Convert(c).(color.Gray)
}, },
"mean": func(c color.Color) color.Color { "mean": func(c color.Color) color.Gray {
r, g, b, _ := c.RGBA() r, g, b, _ := c.RGBA()
y := float64(r+g+b) / 3 * (255.0 / 65535) y := float64(r+g+b) / 3 * (255.0 / 65535)
return color.Gray{uint8(y)} return color.Gray{uint8(y)}
}, },
"luma": func(c color.Color) color.Color { "luma": func(c color.Color) color.Gray {
r, g, b, _ := c.RGBA() r, g, b, _ := c.RGBA()
y := (0.2126*float64(r) + 0.7152*float64(g) + 0.0722*float64(b)) * (255.0 / 65535) y := (0.2126*float64(r) + 0.7152*float64(g) + 0.0722*float64(b)) * (255.0 / 65535)
return color.Gray{uint8(y)} return color.Gray{uint8(y)}
}, },
"luster": func(c color.Color) color.Color { "luster": func(c color.Color) color.Gray {
r, g, b, _ := c.RGBA() r, g, b, _ := c.RGBA()
arr := []float64{float64(r), float64(g), float64(b)} arr := []float64{float64(r), float64(g), float64(b)}
sort.Float64s(arr) sort.Float64s(arr)
@ -43,7 +43,7 @@ func toGray(img image.Image, algo string) *image.Gray {
for y := img.Bounds().Min.Y; y < img.Bounds().Max.Y; y++ { for y := img.Bounds().Min.Y; y < img.Bounds().Max.Y; y++ {
for x := img.Bounds().Min.X; x < img.Bounds().Max.X; x++ { for x := img.Bounds().Min.X; x < img.Bounds().Max.X; x++ {
grayImg.Set(x, y, algoConv(img.At(x, y))) grayImg.SetGray(x, y, algoConv(img.At(x, y)))
} }
} }
return grayImg return grayImg