Add simple Otsu binarize tool (written a while ago)

1 files changed, 38 insertions, 0 deletions

diff --git a/binarize/binarize.go b/binarize/binarize.go
new file mode 100644
index 0000000..0290ef4
--- /dev/null
+++ b/binarize/binarize.go
@@ -0,0 +1,38 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"log"
+	"os"
+
+	"github.com/Ernyoke/Imger/threshold"
+	"github.com/Ernyoke/Imger/imgio"
+)
+
+func main() {
+	flag.Usage = func() {
+		fmt.Fprintf(os.Stderr, "Usage: binarize inimg outimg\n")
+		flag.PrintDefaults()
+	}
+	flag.Parse()
+	if flag.NArg() < 2 {
+		flag.Usage()
+		os.Exit(1)
+	}
+
+	img, err := imgio.ImreadGray(flag.Arg(0))
+	if err != nil {
+		log.Fatalf("Could not read image %s\n", flag.Arg(0))
+	}
+
+	thresh, err := threshold.OtsuThreshold(img, threshold.ThreshBinary)
+	if err != nil {
+		log.Fatal("Error binarising image\n")
+	}
+
+	err = imgio.Imwrite(thresh, flag.Arg(1))
+	if err != nil {
+		log.Fatalf("Could not write image %s\n", flag.Arg(1))
+	}
+}