diff options
author | Nick White <git@njw.name> | 2020-02-26 16:53:14 +0000 |
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committer | Nick White <git@njw.name> | 2020-02-26 16:53:14 +0000 |
commit | e320e069844b8f9c6e5d7e4e407cc90dff3b0f04 (patch) | |
tree | b5e011fcd79997c89ae20f113885d483d3814db7 /cmd/preprocmulti | |
parent | a47b35dc44f0e770a1bb1f7b53b6aa11d6895e0b (diff) |
Move things around so that integralimg is in its own repository
Diffstat (limited to 'cmd/preprocmulti')
-rw-r--r-- | cmd/preprocmulti/main.go | 105 |
1 files changed, 0 insertions, 105 deletions
diff --git a/cmd/preprocmulti/main.go b/cmd/preprocmulti/main.go deleted file mode 100644 index aeac767..0000000 --- a/cmd/preprocmulti/main.go +++ /dev/null @@ -1,105 +0,0 @@ -// Copyright 2019 Nick White. -// Use of this source code is governed by the GPLv3 -// license that can be found in the LICENSE file. - -package main - -// TODO: come up with a way to set a good ksize automatically - -import ( - "flag" - "fmt" - "image" - "image/draw" - _ "image/jpeg" - "image/png" - "log" - "os" - - "rescribe.xyz/preproc" - "rescribe.xyz/preproc/integralimg" -) - -// TODO: do more testing to see how good this assumption is -func autowsize(bounds image.Rectangle) int { - return bounds.Dx() / 60 -} - -func main() { - ksizes := []float64{0.1, 0.2, 0.4, 0.5} - - flag.Usage = func() { - fmt.Fprintf(os.Stderr, "Usage: preprocmulti [-bt bintype] [-bw winsize] [-m minperc] [-nowipe] [-ws wipesize] inimg outbase\n") - fmt.Fprintf(os.Stderr, "Binarize and preprocess an image, with multiple binarisation levels,\n") - fmt.Fprintf(os.Stderr, "saving images to outbase_bin{k}.png.\n") - fmt.Fprintf(os.Stderr, "Binarises with these levels for k: %v.\n", ksizes) - flag.PrintDefaults() - } - binwsize := flag.Int("bw", 0, "Window size for sauvola binarization algorithm. Set automatically based on resolution if not set.") - btype := flag.String("bt", "binary", "Type of binarization threshold. binary or zeroinv are currently implemented.") - min := flag.Int("m", 30, "Minimum percentage of the image width for the content width calculation to be considered valid.") - nowipe := flag.Bool("nowipe", false, "Disable wiping completely.") - wipewsize := flag.Int("ws", 5, "Window size for wiping algorithm.") - flag.Parse() - if flag.NArg() < 2 { - flag.Usage() - os.Exit(1) - } - - log.Printf("Opening %s\n", flag.Arg(0)) - 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 *binwsize == 0 { - *binwsize = autowsize(b) - } - - if *binwsize%2 == 0 { - *binwsize++ - } - - var clean, threshimg image.Image - log.Print("Precalculating integral images") - integrals := integralimg.ToAllIntegralImg(gray) - - for _, k := range ksizes { - log.Print("Binarising") - threshimg = preproc.PreCalcedSauvola(integrals, gray, k, *binwsize) - - if *btype == "zeroinv" { - threshimg, err = preproc.BinToZeroInv(threshimg.(*image.Gray), img.(*image.RGBA)) - if err != nil { - log.Fatal(err) - } - } - - if !*nowipe { - log.Print("Wiping sides") - clean = preproc.Wipe(threshimg.(*image.Gray), *wipewsize, k*0.02, *min) - } else { - clean = threshimg - } - - savefn := fmt.Sprintf("%s_bin%0.1f.png", flag.Arg(1), k) - log.Printf("Saving %s\n", savefn) - f, err = os.Create(savefn) - if err != nil { - log.Fatalf("Could not create file %s: %v\n", savefn, err) - } - defer f.Close() - err = png.Encode(f, clean) - if err != nil { - log.Fatalf("Could not encode image: %v\n", err) - } - } -} |