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package main
import (
"flag"
"fmt"
"log"
"os"
"github.com/Ernyoke/Imger/imgio"
)
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")
ksize := flag.Float64("k", 0.5, "K for sauvola algorithm")
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))
}
// TODO: should be able to estimate an appropriate window size based on resolution
thresh := Sauvola(img, *ksize, *wsize)
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))
}
}
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