diff options
Diffstat (limited to 'preproc/wipesides.go')
| -rw-r--r-- | preproc/wipesides.go | 19 |
1 files changed, 17 insertions, 2 deletions
diff --git a/preproc/wipesides.go b/preproc/wipesides.go index 04bfa11..9b8387a 100644 --- a/preproc/wipesides.go +++ b/preproc/wipesides.go @@ -90,10 +90,25 @@ func wipesides(img *image.Gray, lowedge int, highedge int) *image.Gray { return new } +// toonarrow checks whether the area between lowedge and highedge is +// less than min % of the total image width +func toonarrow(img *image.Gray, lowedge int, highedge int, min int) bool { + b := img.Bounds() + imgw := b.Max.X - b.Min.X + wipew := highedge - lowedge + if float64(wipew) / float64(imgw) * 100 < float64(min) { + return true + } + return false +} + // wipe fills the sections of image which fall outside the content -// area with white -func Wipe(img *image.Gray, wsize int, thresh float64) *image.Gray { +// area with white, providing the content area is above min % +func Wipe(img *image.Gray, wsize int, thresh float64, min int) *image.Gray { integral := integralimg.ToIntegralImg(img) lowedge, highedge := findedges(integral, wsize, thresh) + if toonarrow(img, lowedge, highedge, min) { + return img + } return wipesides(img, lowedge, highedge) } |