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30b4e68549
Note: this bug is likely to have adversely affected detection quality on any non-square image sources.
23 lines
473 B
Go
23 lines
473 B
Go
package pigo
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import (
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"image"
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)
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// RgbToGrayscale converts the image to grayscale mode.
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func RgbToGrayscale(src *image.NRGBA) []uint8 {
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cols, rows := src.Bounds().Dx(), src.Bounds().Dy()
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gray := make([]uint8, rows*cols)
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for r := 0; r < rows; r++ {
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for c := 0; c < cols; c++ {
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gray[r*cols+c] = uint8(
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0.299*float64(src.Pix[r*4*cols+4*c+0]) +
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0.587*float64(src.Pix[r*4*cols+4*c+1]) +
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0.114*float64(src.Pix[r*4*cols+4*c+2]),
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)
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}
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}
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return gray
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}
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