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package main
import (
"bufio"
"flag"
"fmt"
"io"
"io/ioutil"
"log"
"os"
"path/filepath"
"sort"
"strconv"
"strings"
)
type LineDetail struct {
Filename string
Avgconf float64
Filebase string
Basename string
Dirname string
Fulltext string
}
type LineDetails []LineDetail
// Used by sort.Sort.
func (l LineDetails) Len() int { return len(l) }
// Used by sort.Sort.
func (l LineDetails) Less(i, j int) bool {
return l[i].Avgconf < l[j].Avgconf
}
// Used by sort.Sort.
func (l LineDetails) Swap(i, j int) { l[i], l[j] = l[j], l[i] }
func copyline(filebase string, dirname string, basename string, avgconf string, outdir string, todir string) (err error) {
outname := filepath.Join(outdir, todir, filepath.Base(dirname) + "_" + basename + "_" + avgconf)
//log.Fatalf("I'd use '%s' as outname, and '%s' as filebase\n", outname, filebase)
for _, extn := range []string{".bin.png", ".txt"} {
infile, err := os.Open(filebase + extn)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to open %s\n", filebase + extn)
return err
}
defer infile.Close()
err = os.MkdirAll(filepath.Join(outdir, todir), 0700)
if err != nil {
return err
}
outfile, err := os.Create(outname + extn)
if err != nil {
fmt.Fprintf(os.Stderr, "Failed to create %s\n", outname + extn)
return err
}
defer outfile.Close()
_, err = io.Copy(outfile, infile)
if err != nil {
return err
}
}
return err
}
func main() {
flag.Usage = func() {
fmt.Fprintf(os.Stderr, "Usage: line-conf-buckets prob1 [prob2] [...]\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(LineDetails, 0)
for _, f := range flag.Args() {
file, err := os.Open(f)
if err != nil {
fmt.Fprintf(os.Stderr, "Error opening %s\n", f)
log.Fatal(err)
}
defer file.Close()
reader := bufio.NewReader(file)
totalconf := float64(0)
num := 0
err = nil
for err == nil {
var line string
line, err = reader.ReadString('\n')
fields := strings.Fields(line)
if len(fields) == 2 {
conf, converr := strconv.ParseFloat(fields[1], 64)
if converr != nil {
fmt.Fprintf(os.Stderr, "Error: can't convert '%s' to float (full line: %s)\n", fields[1], line)
continue
}
totalconf += conf
num += 1
}
}
avg := totalconf / float64(num)
// Explicitly close file immediately after use, rather than relying on defer,
// as too many files could be opened before any of the files are closed, leading
// to a 'too many open files' error
// TODO: rewrite this loop so it uses a function or two, so we can rely
// on defer sensibly again.
file.Close()
if num == 0 || avg == 0 {
continue
}
var linedetail LineDetail
linedetail.Filename = f
linedetail.Avgconf = avg
linedetail.Filebase = strings.Replace(f, ".prob", "", 1)
linedetail.Basename = filepath.Base(linedetail.Filebase)
linedetail.Dirname = filepath.Dir(linedetail.Filebase)
txtfile, ferr := os.Open(linedetail.Filebase + ".txt")
if ferr != nil {
fmt.Fprintf(os.Stderr, "Error opening %s\n", linedetail.Filebase + ".txt")
log.Fatal(ferr)
}
defer txtfile.Close()
ft, ferr := ioutil.ReadAll(txtfile)
if ferr != nil {
fmt.Fprintf(os.Stderr, "Error reading %s\n", linedetail.Filebase + ".txt")
log.Fatal(ferr)
}
linedetail.Fulltext = string(ft)
// Explicitly close file immediately after use, rather than relying on defer,
// as too many files could be opened before any of the files are closed, leading
// to a 'too many open files' error
// TODO: rewrite this loop so it uses a function or two, so we can rely
// on defer sensibly again.
txtfile.Close()
lines = append(lines, linedetail)
}
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, 'G', -1, 64)
avgstr = avgstr[2:]
err := copyline(l.Filebase, l.Dirname, l.Basename, avgstr, outdir, todir)
if err != nil {
log.Fatal(err)
}
}
total := worstnum + mediumnum + bestnum
if total == 0 {
log.Fatal("No lines copied")
}
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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