3 files changed, 18 insertions, 18 deletions

diff --git a/preproc/cmd/cleanup/main.go b/preproc/cmd/wipe/main.go
index 7ea0c84..e735a0a 100644
--- a/preproc/cmd/cleanup/main.go
+++ b/preproc/cmd/wipe/main.go
@@ -1,8 +1,6 @@
 package main
 
 // TODO: add minimum size variable (default ~30%?)
-// TODO: make into a small library
-// TODO: have the integral image specific stuff done by interface functions
 
 import (
 	"flag"
@@ -14,13 +12,13 @@ import (
 	"log"
 	"os"
 
-	"rescribe.xyz/go.git/binarize"
 	"rescribe.xyz/go.git/preproc"
 )
 
 func main() {
 	flag.Usage = func() {
-		fmt.Fprintf(os.Stderr, "Usage: cleanup [-t thresh] [-w winsize] inimg outimg\n")
+		fmt.Fprintf(os.Stderr, "Usage: wipe [-t thresh] [-w winsize] inimg outimg\n")
+		fmt.Fprintf(os.Stderr, "Wipes the sections of an image which are outside the content area.\n")
 		flag.PrintDefaults()
 	}
 	wsize := flag.Int("w", 5, "Window size for mask finding algorithm.")
@@ -44,11 +42,7 @@ func main() {
 	gray := image.NewGray(image.Rect(0, 0, b.Dx(), b.Dy()))
 	draw.Draw(gray, b, img, b.Min, draw.Src)
 
-	integral := binarize.Integralimg(gray)
-
-	lowedge, highedge := preproc.Findedges(integral, *wsize, *thresh)
-
-	clean := preproc.Wipesides(gray, lowedge, highedge)
+	clean := preproc.Wipe(gray, *wsize, *thresh)
 
 	f, err = os.Create(flag.Arg(1))
 	if err != nil {
diff --git a/preproc/wipesides.go b/preproc/wipesides.go
index 2afe1d2..60911cd 100644
--- a/preproc/wipesides.go
+++ b/preproc/wipesides.go
@@ -6,6 +6,8 @@ package preproc
 import (
 	"image"
 	"image/color"
+
+	"rescribe.xyz/go.git/binarize"
 )
 
 type windowslice struct {
@@ -69,10 +71,10 @@ func findbestedge(integral [][]uint64, x int, w int) int {
 	return bestx
 }
 
-// Findedges finds the edges of the main content, by moving a window of wsize
+// findedges finds the edges of the main content, by moving a window of wsize
 // from the middle of the image to the left and right, stopping when it reaches
 // a point at which there is a lower proportion of black pixels than thresh.
-func Findedges(integral [][]uint64, wsize int, thresh float64) (int, int) {
+func findedges(integral [][]uint64, wsize int, thresh float64) (int, int) {
 	maxx := len(integral[0]) - 1
 	var lowedge, highedge int = 0, maxx
 
@@ -93,9 +95,9 @@ func Findedges(integral [][]uint64, wsize int, thresh float64) (int, int) {
 	return lowedge, highedge
 }
 
-// Wipesides fills the sections of image not within the boundaries
+// wipesides fills the sections of image not within the boundaries
 // of lowedge and highedge with white
-func Wipesides(img *image.Gray, lowedge int, highedge int) *image.Gray {
+func wipesides(img *image.Gray, lowedge int, highedge int) *image.Gray {
 	b := img.Bounds()
 	new := image.NewGray(b)
 
@@ -120,3 +122,11 @@ func Wipesides(img *image.Gray, lowedge int, highedge int) *image.Gray {
 
 	return new
 }
+
+// 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 {
+	integral := binarize.Integralimg(img)
+	lowedge, highedge := findedges(integral, wsize, thresh)
+	return wipesides(img, lowedge, highedge)
+}
diff --git a/preproc/wipesides_test.go b/preproc/wipesides_test.go
index 76151fb..b0ada4e 100644
--- a/preproc/wipesides_test.go
+++ b/preproc/wipesides_test.go
@@ -11,8 +11,6 @@ import (
 	"image/png"
 	"os"
 	"testing"
-
-	"rescribe.xyz/go.git/binarize"
 )
 
 var update = flag.Bool("update", false, "update golden files")
@@ -79,9 +77,7 @@ func TestWipeSides(t *testing.T) {
 			if err != nil {
 				t.Fatalf("Could not open file %s: %v\n", c.orig, err)
 			}
-			integral := binarize.Integralimg(orig)
-			lowedge, highedge := Findedges(integral, c.wsize, c.thresh)
-			actual = Wipesides(orig, lowedge, highedge)
+			actual = Wipe(orig, c.wsize, c.thresh)
 			if *update {
 				f, err := os.Create(c.golden)
 				defer f.Close()