diff options
Diffstat (limited to 'preproc/cmd/binarize')
| -rw-r--r-- | preproc/cmd/binarize/main.go | 78 | 
1 files changed, 0 insertions, 78 deletions
| diff --git a/preproc/cmd/binarize/main.go b/preproc/cmd/binarize/main.go deleted file mode 100644 index e7f677e..0000000 --- a/preproc/cmd/binarize/main.go +++ /dev/null @@ -1,78 +0,0 @@ -package main - -import ( -	"flag" -	"fmt" -	"image" -	"image/draw" -	_ "image/jpeg" -	"image/png" -	"log" -	"os" - -	"rescribe.xyz/go.git/preproc" -) - -// TODO: do more testing to see how good this assumption is -func autowsize(bounds image.Rectangle) int { -	return bounds.Dx() / 60 -} - -func main() { -	flag.Usage = func() { -		fmt.Fprintf(os.Stderr, "Usage: binarize [-k num] [-t type] [-w num] inimg outimg\n") -		flag.PrintDefaults() -	} -	wsize := flag.Int("w", 0, "Window size for sauvola algorithm. Set automatically based on resolution if not set.") -	ksize := flag.Float64("k", 0.5, "K for sauvola algorithm. This controls the overall threshold level. Set it lower for very light text (try 0.1 or 0.2).") -	btype := flag.String("t", "binary", "Type of threshold. binary or zeroinv are currently implemented.") -	flag.Parse() -	if flag.NArg() < 2 { -		flag.Usage() -		os.Exit(1) -	} - -	f, err := os.Open(flag.Arg(0)) -	defer f.Close() -	if err != nil { -		log.Fatalf("Could not open file %s: %v\n", flag.Arg(0), err) -	} -	img, _, err := image.Decode(f) -	if err != nil { -		log.Fatalf("Could not decode image: %v\n", err) -	} -	b := img.Bounds() -	gray := image.NewGray(image.Rect(0, 0, b.Dx(), b.Dy())) -	draw.Draw(gray, b, img, b.Min, draw.Src) - -	if *wsize == 0 { -		*wsize = autowsize(b) -		log.Printf("Set window size to %d\n", *wsize) -	} - -	if *wsize%2 == 0 { -		*wsize++ -	} - -	// TODO: come up with a way to set a good ksize automatically - -	var thresh image.Image -	thresh = preproc.IntegralSauvola(gray, *ksize, *wsize) - -	if *btype == "zeroinv" { -		thresh, err = preproc.BinToZeroInv(thresh.(*image.Gray), img.(*image.RGBA)) -		if err != nil { -			log.Fatal(err) -		} -	} - -	f, err = os.Create(flag.Arg(1)) -	if err != nil { -		log.Fatalf("Could not create file %s: %v\n", flag.Arg(1), err) -	} -	defer f.Close() -	err = png.Encode(f, thresh) -	if err != nil { -		log.Fatalf("Could not encode image: %v\n", err) -	} -} | 
