diff options
Diffstat (limited to 'sauvola.go')
| -rw-r--r-- | sauvola.go | 8 |
1 files changed, 7 insertions, 1 deletions
@@ -61,7 +61,8 @@ func PreCalcedSauvola(intImg integralimg.Image, intSqImg integralimg.SqImage, im for y := b.Min.Y; y < b.Max.Y; y++ { for x := b.Min.X; x < b.Max.X; x++ { - m, dev := integralimg.MeanStdDevWindow(intImg, intSqImg, x, y, windowsize) + r := centeredRectangle(x, y, windowsize) + m, dev := integralimg.MeanStdDev(intImg, intSqImg, r) // Divide by 255 to adjust from Gray16 used by integralimg to 8 bit Gray m8 := m / 255 dev8 := dev / 255 @@ -76,3 +77,8 @@ func PreCalcedSauvola(intImg integralimg.Image, intSqImg integralimg.SqImage, im return new } + +func centeredRectangle(x, y, size int) image.Rectangle { + step := size / 2 + return image.Rect(x - step - 1, y - step - 1, x + step, y + step) +} |