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authorNick White <git@njw.name>2019-06-03 16:33:20 +0100
committerNick White <git@njw.name>2019-06-03 16:33:20 +0100
commitb401f1fadc934b22bc3c9d9f467d50c97b1cc3d8 (patch)
tree653510adecd2bda9b11398499b32c1058d3cf917 /preproc/cmd
parent20b694ee8510692804908f51fbbee3c39c859f37 (diff)
Add option to disable wiping for preproc and preprocmulti
Diffstat (limited to 'preproc/cmd')
-rw-r--r--preproc/cmd/preproc/main.go13
-rw-r--r--preproc/cmd/preprocmulti/main.go13
2 files changed, 18 insertions, 8 deletions
diff --git a/preproc/cmd/preproc/main.go b/preproc/cmd/preproc/main.go
index d8d5b66..898efb5 100644
--- a/preproc/cmd/preproc/main.go
+++ b/preproc/cmd/preproc/main.go
@@ -22,7 +22,7 @@ func autowsize(bounds image.Rectangle) int {
func main() {
flag.Usage = func() {
- fmt.Fprintf(os.Stderr, "Usage: preproc [-bt bintype] [-bw winsize] [-k num] [-m minperc] [-wt wipethresh] [-ws wipesize] inimg outimg\n")
+ fmt.Fprintf(os.Stderr, "Usage: preproc [-bt bintype] [-bw winsize] [-k num] [-m minperc] [-nowipe] [-wt wipethresh] [-ws wipesize] inimg outimg\n")
fmt.Fprintf(os.Stderr, "Binarize and preprocess an image\n")
flag.PrintDefaults()
}
@@ -30,6 +30,7 @@ func main() {
ksize := flag.Float64("k", 0.5, "K for sauvola binarization algorithm. This controls the overall threshold level. Set it lower for very light text (try 0.1 or 0.2).")
btype := flag.String("bt", "binary", "Type of binarization threshold. binary or zeroinv are currently implemented.")
min := flag.Int("m", 30, "Minimum percentage of the image width for the content width calculation to be considered valid.")
+ nowipe := flag.Bool("nowipe", false, "Disable wiping completely.")
wipewsize := flag.Int("ws", 5, "Window size for wiping algorithm.")
thresh := flag.Float64("wt", 0.05, "Threshold for the wiping algorithm to determine the proportion of black pixels below which a window is determined to be the edge.")
flag.Parse()
@@ -60,7 +61,7 @@ func main() {
}
log.Print("Binarising")
- var threshimg image.Image
+ var clean, threshimg image.Image
threshimg = preproc.IntegralSauvola(gray, *ksize, *binwsize)
if *btype == "zeroinv" {
@@ -70,8 +71,12 @@ func main() {
}
}
- log.Print("Wiping sides")
- clean := preproc.Wipe(threshimg.(*image.Gray), *wipewsize, *thresh, *min)
+ if ! *nowipe {
+ log.Print("Wiping sides")
+ clean = preproc.Wipe(threshimg.(*image.Gray), *wipewsize, *thresh, *min)
+ } else {
+ clean = threshimg
+ }
f, err = os.Create(flag.Arg(1))
if err != nil {
diff --git a/preproc/cmd/preprocmulti/main.go b/preproc/cmd/preprocmulti/main.go
index 947625e..9c979c3 100644
--- a/preproc/cmd/preprocmulti/main.go
+++ b/preproc/cmd/preprocmulti/main.go
@@ -25,7 +25,7 @@ func main() {
ksizes := []float64{0.2, 0.3, 0.4, 0.5, 0.6}
flag.Usage = func() {
- fmt.Fprintf(os.Stderr, "Usage: preproc [-bt bintype] [-bw winsize] [-m minperc] [-wt wipethresh] [-ws wipesize] inimg outbase\n")
+ fmt.Fprintf(os.Stderr, "Usage: preprocmulti [-bt bintype] [-bw winsize] [-m minperc] [-nowipe] [-wt wipethresh] [-ws wipesize] inimg outbase\n")
fmt.Fprintf(os.Stderr, "Binarize and preprocess an image, with multiple binarisation levels,\n")
fmt.Fprintf(os.Stderr, "saving images to outbase_bin{k}.png.\n")
fmt.Fprintf(os.Stderr, "Binarises with these levels for k: %v.\n", ksizes)
@@ -34,6 +34,7 @@ func main() {
binwsize := flag.Int("bw", 0, "Window size for sauvola binarization algorithm. Set automatically based on resolution if not set.")
btype := flag.String("bt", "binary", "Type of binarization threshold. binary or zeroinv are currently implemented.")
min := flag.Int("m", 30, "Minimum percentage of the image width for the content width calculation to be considered valid.")
+ nowipe := flag.Bool("nowipe", false, "Disable wiping completely.")
wipewsize := flag.Int("ws", 5, "Window size for wiping algorithm.")
thresh := flag.Float64("wt", 0.05, "Threshold for the wiping algorithm to determine the proportion of black pixels below which a window is determined to be the edge.")
flag.Parse()
@@ -64,7 +65,7 @@ func main() {
*binwsize++
}
- var threshimg image.Image
+ var clean, threshimg image.Image
log.Print("Precalculating integral images")
integrals := integralimg.ToAllIntegralImg(gray)
@@ -79,8 +80,12 @@ func main() {
}
}
- log.Print("Wiping sides")
- clean := preproc.Wipe(threshimg.(*image.Gray), *wipewsize, *thresh, *min)
+ if ! *nowipe {
+ log.Print("Wiping sides")
+ clean = preproc.Wipe(threshimg.(*image.Gray), *wipewsize, *thresh, *min)
+ } else {
+ clean = threshimg
+ }
savefn := fmt.Sprintf("%s_bin%0.1f.png", flag.Arg(1), k)
log.Printf("Saving %s\n", savefn)