From e320e069844b8f9c6e5d7e4e407cc90dff3b0f04 Mon Sep 17 00:00:00 2001
From: Nick White <git@njw.name>
Date: Wed, 26 Feb 2020 16:53:14 +0000
Subject: Move things around so that integralimg is in its own repository

---
 cmd/preproc/main.go | 94 -----------------------------------------------------
 1 file changed, 94 deletions(-)
 delete mode 100644 cmd/preproc/main.go

(limited to 'cmd/preproc')

diff --git a/cmd/preproc/main.go b/cmd/preproc/main.go
deleted file mode 100644
index 3323635..0000000
--- a/cmd/preproc/main.go
+++ /dev/null
@@ -1,94 +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"
-)
-
-// 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: preproc [-bt bintype] [-bw winsize] [-k num] [-m minperc] [-nowipe] [-wt wipethresh] [-ws wipesize] inimg outimg\n")
-		fmt.Fprintf(os.Stderr, "Binarize and preprocess an image\n")
-		flag.PrintDefaults()
-	}
-	binwsize := flag.Int("bw", 0, "Window size for sauvola binarization algorithm. Set automatically based on resolution if not set.")
-	ksize := flag.Float64("k", 0.5, "K for sauvola binarization algorithm. This controls the overall threshold level. Set it lower for very light text (try 0.1 or 0.2).")
-	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.")
-	thresh := flag.Float64("wt", 0.05, "Threshold for the wiping algorithm to determine the proportion of black pixels below which a window is determined to be the edge.")
-	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 *binwsize == 0 {
-		*binwsize = autowsize(b)
-	}
-
-	if *binwsize%2 == 0 {
-		*binwsize++
-	}
-
-	log.Print("Binarising")
-	var clean, threshimg image.Image
-	threshimg = preproc.IntegralSauvola(gray, *ksize, *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, *thresh, *min)
-	} else {
-		clean = threshimg
-	}
-
-	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, clean)
-	if err != nil {
-		log.Fatalf("Could not encode image: %v\n", err)
-	}
-}
-- 
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