From f20982f465ee4735caf5b0ebc3c57af31ee90e75 Mon Sep 17 00:00:00 2001 From: Nick White Date: Tue, 26 Mar 2019 15:43:21 +0000 Subject: Move sauvola binarization tool to cmd/binarize --- binarize/cmd/binarize/main.go | 69 +++++++++++++++++++++++++++++++++++++++++++ sauvola/main.go | 69 ------------------------------------------- 2 files changed, 69 insertions(+), 69 deletions(-) create mode 100644 binarize/cmd/binarize/main.go delete mode 100644 sauvola/main.go diff --git a/binarize/cmd/binarize/main.go b/binarize/cmd/binarize/main.go new file mode 100644 index 0000000..c4b9562 --- /dev/null +++ b/binarize/cmd/binarize/main.go @@ -0,0 +1,69 @@ +package main + +import ( + "flag" + "fmt" + "image" + "image/draw" + _ "image/jpeg" + "image/png" + "log" + "os" + + "rescribe.xyz/go.git/binarize" +) + +// 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: sauvola [-w num] [-k 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).") + 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 + + thresh := binarize.IntegralSauvola(gray, *ksize, *wsize) + + 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) + } +} diff --git a/sauvola/main.go b/sauvola/main.go deleted file mode 100644 index c4b9562..0000000 --- a/sauvola/main.go +++ /dev/null @@ -1,69 +0,0 @@ -package main - -import ( - "flag" - "fmt" - "image" - "image/draw" - _ "image/jpeg" - "image/png" - "log" - "os" - - "rescribe.xyz/go.git/binarize" -) - -// 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: sauvola [-w num] [-k 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).") - 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 - - thresh := binarize.IntegralSauvola(gray, *ksize, *wsize) - - 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) - } -} -- cgit v1.2.1-24-ge1ad