1 files changed, 44 insertions, 0 deletions
diff --git a/binarize/main.go b/binarize/main.go
new file mode 100644
index 0000000..610effc
--- /dev/null
+++ b/binarize/main.go
@@ -0,0 +1,44 @@
+package main
+
+// TODO: could look into other algorithms, see for examples see
+//       the README at https://github.com/brandonmpetty/Doxa
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"os"
+
+	"github.com/Ernyoke/Imger/imgio" // TODO: get rid of this and do things myself
+)
+
+func main() {
+	flag.Usage = func() {
+		fmt.Fprintf(os.Stderr, "Usage: binarize [-w num] [-k num] inimg outimg\n")
+		flag.PrintDefaults()
+	}
+	wsize := flag.Int("w", 31, "Window size for sauvola algorithm (needs to be odd)")
+        ksize := flag.Float64("k", 0.5, "K for sauvola algorithm")
+	flag.Parse()
+	if flag.NArg() < 2 {
+		flag.Usage()
+		os.Exit(1)
+	}
+
+	if *wsize % 2 == 0 {
+		*wsize++
+	}
+
+	img, err := imgio.ImreadGray(flag.Arg(0))
+	if err != nil {
+		log.Fatalf("Could not read image %s\n", flag.Arg(0))
+	}
+
+	// TODO: estimate an appropriate window size based on resolution
+	thresh := IntegralSauvola(img, *ksize, *wsize)
+
+	err = imgio.Imwrite(thresh, flag.Arg(1))
+	if err != nil {
+		log.Fatalf("Could not write image %s\n", flag.Arg(1))
+	}
+}