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authorNick White <git@njw.name>2020-02-26 16:53:14 +0000
committerNick White <git@njw.name>2020-02-26 16:53:14 +0000
commite320e069844b8f9c6e5d7e4e407cc90dff3b0f04 (patch)
treeb5e011fcd79997c89ae20f113885d483d3814db7 /cmd/preprocmulti
parenta47b35dc44f0e770a1bb1f7b53b6aa11d6895e0b (diff)
Move things around so that integralimg is in its own repository
Diffstat (limited to 'cmd/preprocmulti')
-rw-r--r--cmd/preprocmulti/main.go105
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)
- }
- }
-}