From 7482157a03ed3e9d7f45e54a126b391001f34948 Mon Sep 17 00:00:00 2001
From: Nick White <git@njw.name>
Date: Tue, 8 Oct 2019 12:52:33 +0100
Subject: Separate out bookpipeline from catch-all go.git repo, and rename to
 rescribe.xyz/bookpipeline

The dependencies from the go.git repo will follow in due course.
---
 preproc/preprocmulti.go | 94 -------------------------------------------------
 1 file changed, 94 deletions(-)
 delete mode 100644 preproc/preprocmulti.go

(limited to 'preproc/preprocmulti.go')

diff --git a/preproc/preprocmulti.go b/preproc/preprocmulti.go
deleted file mode 100644
index 2e7cb06..0000000
--- a/preproc/preprocmulti.go
+++ /dev/null
@@ -1,94 +0,0 @@
-package preproc
-
-// TODO: come up with a way to set a good ksize automatically
-
-import (
-	"fmt"
-	"image"
-	"image/draw"
-	_ "image/jpeg"
-	"image/png"
-	"os"
-	"strings"
-
-	"rescribe.xyz/go.git/integralimg"
-)
-
-// TODO: do more testing to see how good this assumption is
-func autowsize(bounds image.Rectangle) int {
-	return bounds.Dx() / 60
-}
-
-// PreProcMulti binarizes and preprocesses an image with multiple binarisation levels.
-// inPath: Path of input image.
-// ksizes: Slice of k values to pass to Sauvola algorithm
-// binType: Type of binarization threshold. binary or zeroinv are currently implemented.
-// binWsize: Window size for sauvola binarization algorithm. Set automatically based on resolution if 0.
-// wipe: Whether to wipe (clear sides) the image
-// wipeWsize: Window size for wiping algorithm
-// wipeMinWidthPerc: Minimum percentage of the image width for the content width calculation to be considered valid
-// Note: copied from cmd/preprocmulti/main.go, should think about the best way
-//       to organise this code later.
-// TODO: return errors that encapsulate the err describing where it was encountered
-// TODO: do the post-integral image stuff in separate goroutines for speed
-func PreProcMulti(inPath string, ksizes []float64, binType string, binWsize int, wipe bool, wipeWsize int, wipeMinWidthPerc int) ([]string, error) {
-	// Make outBase inPath up to final .
-	s := strings.Split(inPath, ".")
-	outBase := strings.Join(s[:len(s)-1], "")
-
-	var donePaths []string
-
-	f, err := os.Open(inPath)
-	if err != nil {
-		return donePaths, err
-	}
-	defer f.Close()
-	img, _, err := image.Decode(f)
-	if err != nil {
-		return donePaths, 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
-	integrals := integralimg.ToAllIntegralImg(gray)
-
-	for _, k := range ksizes {
-		threshimg = PreCalcedSauvola(integrals, gray, k, binWsize)
-
-		if binType == "zeroinv" {
-			threshimg, err = BinToZeroInv(threshimg.(*image.Gray), img.(*image.RGBA))
-			if err != nil {
-				return donePaths, err
-			}
-		}
-
-		if wipe {
-			clean = Wipe(threshimg.(*image.Gray), wipeWsize, k*0.02, wipeMinWidthPerc)
-		} else {
-			clean = threshimg
-		}
-
-		savefn := fmt.Sprintf("%s_bin%0.1f.png", outBase, k)
-		f, err = os.Create(savefn)
-		if err != nil {
-			return donePaths, err
-		}
-		defer f.Close()
-		err = png.Encode(f, clean)
-		if err != nil {
-			return donePaths, err
-		}
-		donePaths = append(donePaths, savefn)
-	}
-	return donePaths, nil
-}
-- 
cgit v1.2.1-24-ge1ad