From 6e08494a8883a8e304ef02ea352a11776ab2294c Mon Sep 17 00:00:00 2001
From: Nick White <git@njw.name>
Date: Thu, 24 Jan 2019 17:56:14 +0000
Subject: Merge bucket-lines-{prob,hocr} into one tool called bucket-lines,
 that uses the filename extension to determine how to process the lines

---
 bucket-lines/bucket-lines.go | 105 +++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 105 insertions(+)
 create mode 100644 bucket-lines/bucket-lines.go

(limited to 'bucket-lines')

diff --git a/bucket-lines/bucket-lines.go b/bucket-lines/bucket-lines.go
new file mode 100644
index 0000000..ad73fcd
--- /dev/null
+++ b/bucket-lines/bucket-lines.go
@@ -0,0 +1,105 @@
+package main
+
+import (
+	"flag"
+	"fmt"
+	"image/png"
+	"io/ioutil"
+	"log"
+	"os"
+	"path/filepath"
+	"strings"
+
+	"git.rescribe.xyz/testingtools/parse"
+	"git.rescribe.xyz/testingtools/parse/hocr"
+	"git.rescribe.xyz/testingtools/parse/prob"
+)
+
+// TODO: maybe move this into hocr.go
+func detailsFromHocr(f string) (parse.LineDetails, error) {
+	var newlines parse.LineDetails
+
+	file, err := ioutil.ReadFile(f)
+	if err != nil {
+		return newlines, err
+	}
+
+	h, err := hocr.Parse(file)
+	if err != nil {
+		return newlines, err
+	}
+
+	pngfn := strings.Replace(f, ".hocr", ".png", 1)
+	pngf, err := os.Open(pngfn)
+	if err != nil {
+		return newlines, err
+	}
+	defer pngf.Close()
+	img, err := png.Decode(pngf)
+	if err != nil {
+		return newlines, err
+	}
+
+	n := strings.Replace(filepath.Base(f), ".hocr", "", 1)
+	return hocr.GetLineDetails(h, img, n)
+}
+
+func main() {
+	// TODO: Allow different specs to be used for .prob vs .hocr. Do this
+	//       by adding a field to LineDetails that is linked to a named
+	//       BucketSpecs.
+	b := parse.BucketSpecs{
+		// minimum confidence, name
+		{ 0, "bad" },
+		{ 0.95, "95to98" },
+		{ 0.98, "98plus" },
+	}
+
+	flag.Usage = func() {
+		fmt.Fprintf(os.Stderr, "Usage: bucket-lines [-d dir] [hocr1] [prob1] [hocr2] [...]\n")
+		fmt.Fprintf(os.Stderr, "Copies image-text line pairs into different directories according\n")
+		fmt.Fprintf(os.Stderr, "to the average character probability for the line.\n\n")
+		fmt.Fprintf(os.Stderr, "Both .hocr and .prob files can be processed.\n\n")
+		fmt.Fprintf(os.Stderr, "For .hocr files, the x_wconf data is used to calculate confidence.\n\n")
+		fmt.Fprintf(os.Stderr, "The .prob files are generated using ocropy-rpred's --probabilities\n")
+		fmt.Fprintf(os.Stderr, "option.\n\n")
+		fmt.Fprintf(os.Stderr, "The .prob and .hocr files are assumed to be in the same directory\n")
+		fmt.Fprintf(os.Stderr, "as the line's image and text files.\n\n")
+		flag.PrintDefaults()
+	}
+	dir := flag.String("d", "buckets", "Directory to store the buckets")
+	flag.Parse()
+	if flag.NArg() < 1 {
+		flag.Usage()
+		os.Exit(1)
+	}
+
+	var err error
+	lines := make(parse.LineDetails, 0)
+
+	for _, f := range flag.Args() {
+		var newlines parse.LineDetails
+		switch ext := filepath.Ext(f); ext {
+			case ".prob":
+				newlines, err = prob.GetLineDetails(f)
+			case ".hocr":
+				newlines, err = detailsFromHocr(f)
+			default:
+				log.Printf("Skipping file '%s' as it isn't a .prob or .hocr\n", f)
+		}
+		if err != nil {
+			log.Fatal(err)
+		}
+
+		for _, l := range newlines {
+			lines = append(lines, l)
+		}
+	}
+
+	stats, err := parse.BucketUp(lines, b, *dir)
+	if err != nil {
+		log.Fatal(err)
+	}
+
+	parse.PrintBucketStats(os.Stdout, stats)
+}
-- 
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