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package main
// TODO: see TODO in hocr package
//
// TODO: Simplify things into functions more; this works well, but is a bit of a rush job
import (
"flag"
"fmt"
"image/png"
"io"
"io/ioutil"
"log"
"os"
"path/filepath"
"sort"
"strconv"
"strings"
"git.rescribe.xyz/testingtools/hocr"
)
func main() {
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "Usage: line-conf-buckets hocr1 [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")
flag.PrintDefaults()
}
flag.Parse()
if flag.NArg() < 1 {
flag.Usage()
os.Exit(1)
}
lines := make(hocr.LineDetails, 0)
for _, f := range flag.Args() {
file, err := ioutil.ReadFile(f)
if err != nil {
log.Fatal(err)
}
h, err := hocr.Parse(file)
if err != nil {
log.Fatal(err)
}
pngfn := strings.Replace(f, ".hocr", ".png", 1)
pngf, err := os.Open(pngfn)
if err != nil {
log.Fatal(err)
}
defer pngf.Close()
img, err := png.Decode(pngf)
if err != nil {
log.Fatal(err)
}
n := strings.Replace(filepath.Base(f), ".hocr", "", 1)
newlines, err := hocr.GetLineDetails(h, img, n)
if err != nil {
log.Fatal(err)
}
for _, l := range newlines {
lines = append(lines, l)
}
}
sort.Sort(lines)
worstnum := 0
mediumnum := 0
bestnum := 0
outdir := "buckets" // TODO: set this from cmdline
todir := ""
for _, l := range lines {
switch {
case l.Avgconf < 0.95:
todir = "bad"
worstnum++
case l.Avgconf < 0.98:
todir = "95to98"
mediumnum++
default:
todir = "98plus"
bestnum++
}
avgstr := strconv.FormatFloat(l.Avgconf, 'f', 5, 64)
avgstr = avgstr[2:]
outname := filepath.Join(outdir, todir, l.Hocrname + "_" + l.Name + "_" + avgstr + ".png")
err := os.MkdirAll(filepath.Join(outdir, todir), 0700)
if err != nil {
log.Fatal(err)
}
outfile, err := os.Create(outname)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to create %s\n", outname)
log.Fatal(err)
}
defer outfile.Close()
err = png.Encode(outfile, l.Img)
if err != nil {
log.Fatal(err)
}
outname = filepath.Join(outdir, todir, l.Hocrname + "_" + l.Name + "_" + avgstr + ".txt")
outfile, err = os.Create(outname)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to create %s\n", outname)
log.Fatal(err)
}
defer outfile.Close()
_, err = io.WriteString(outfile, l.Text)
if err != nil {
log.Fatal(err)
}
// TODO: test whether the line.img works properly with multiple hocrs, as it could be that as it's a pointer, it always points to the latest image (don't think so, but not sure)
}
total := worstnum + mediumnum + bestnum
fmt.Printf("Copied lines to %s\n", outdir)
fmt.Printf("---------------------------------\n")
fmt.Printf("Lines 98%%+ quality: %d%%\n", 100 * bestnum / total)
fmt.Printf("Lines 95-98%% quality: %d%%\n", 100 * mediumnum / total)
fmt.Printf("Lines <95%% quality: %d%%\n", 100 * worstnum / total)
}
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