diff options
| -rw-r--r-- | sauvola.go | 2 | ||||
| -rw-r--r-- | wipesides.go | 10 |
2 files changed, 6 insertions, 6 deletions
@@ -80,5 +80,5 @@ func PreCalcedSauvola(intImg integral.Image, intSqImg integral.SqImage, img imag func centeredRectangle(x, y, size int) image.Rectangle { step := size / 2 - return image.Rect(x - step - 1, y - step - 1, x + step, y + step) + return image.Rect(x-step-1, y-step-1, x+step, y+step) } diff --git a/wipesides.go b/wipesides.go index b9f5e5c..316d0b1 100644 --- a/wipesides.go +++ b/wipesides.go @@ -22,12 +22,12 @@ import ( // ProportionSlice returns the proportion of black pixels in a // vertical slice of an image starting at x, width pixels wide. func ProportionSlice(i SummableImage, x int, width int) float64 { - r := image.Rect(x, 0, x + width, i.Bounds().Dy()) + r := image.Rect(x, 0, x+width, i.Bounds().Dy()) in := r.Intersect(i.Bounds()) area := in.Dx() * in.Dy() // 1 << 16 - 1 as we're using Gray16, so 1 << 16 - 1 = white - numwhite := float64(i.Sum(in)) / float64(1 << 16 - 1) - return float64(area) / float64(numwhite) - 1 + numwhite := float64(i.Sum(in)) / float64(1<<16-1) + return float64(area)/float64(numwhite) - 1 } // findbestedge goes through every vertical line from x to x+w to @@ -99,7 +99,7 @@ func findedgesOutin(img SummableImage, wsize int, thresh float64) (int, int) { maxx := img.Bounds().Dx() - 1 var lowedge, highedge int = 0, maxx - for x := maxx-wsize; x > 0; x-- { + for x := maxx - wsize; x > 0; x-- { if ProportionSlice(img, x, wsize) > thresh { highedge = findbestedge(img, x, wsize) break @@ -191,7 +191,7 @@ func VWipe(img *image.Gray, wsize int, thresh float64, min int) *image.Gray { intImg := integral.NewImage(b) draw.Draw(intImg, b, rotimg, b.Min, draw.Src) // TODO: test whether there are any places where Outin makes a real difference - lowedge, highedge:= findedgesOutin(*intImg, wsize, thresh) + lowedge, highedge := findedgesOutin(*intImg, wsize, thresh) if toonarrow(img, lowedge, highedge, min) { return img } |