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package main
import (
"fmt"
"io"
"path/filepath"
"os"
"sort"
"strconv"
"rescribe.xyz/go.git/lib/line"
)
type BucketSpec struct {
Min float64
Name string
}
type BucketSpecs []BucketSpec
func (b BucketSpecs) Len() int { return len(b) }
func (b BucketSpecs) Swap(i, j int) { b[i], b[j] = b[j], b[i] }
func (b BucketSpecs) Less(i, j int) bool { return b[i].Min < b[j].Min }
type BucketStat struct {
name string
num int
}
type BucketStats []BucketStat
func (b BucketStats) Len() int { return len(b) }
func (b BucketStats) Swap(i, j int) { b[i], b[j] = b[j], b[i] }
func (b BucketStats) Less(i, j int) bool { return b[i].num < b[j].num }
// Copies the image and text for a line into a directory based on
// the line confidence, as defined by the buckets struct
func bucketLine(l line.Detail, buckets BucketSpecs, dirname string) (string, error) {
var bucket string
todir := ""
for _, b := range buckets {
if l.Avgconf >= b.Min {
todir = b.Name
bucket = b.Name
}
}
if todir == "" {
return bucket, nil
}
avgstr := strconv.FormatFloat(l.Avgconf, 'G', -1, 64)
if len(avgstr) > 2 {
avgstr = avgstr[2:]
}
base := filepath.Join(dirname, todir, l.OcrName + "_" + l.Name + "_" + avgstr)
err := os.MkdirAll(filepath.Join(dirname, todir), 0700)
if err != nil {
return bucket, err
}
f, err := os.Create(base + ".png")
if err != nil {
return bucket, err
}
defer f.Close()
err = l.Img.CopyLineTo(f)
if err != nil {
return bucket, err
}
f, err = os.Create(base + ".txt")
if err != nil {
return bucket, err
}
defer f.Close()
_, err = io.WriteString(f, l.Text)
if err != nil {
return bucket, err
}
return bucket, err
}
// Copies line images and text into directories based on their
// confidence, as defined by the buckets struct, and returns
// statistics of whire lines went in the process.
func BucketUp(lines line.Details, buckets BucketSpecs, dirname string) (BucketStats, error) {
var all []string
var stats BucketStats
sort.Sort(lines)
sort.Sort(buckets)
for _, l := range lines {
bname, err := bucketLine(l, buckets, dirname)
if err != nil {
return stats, err
}
all = append(all, bname)
}
for _, b := range all {
i := sort.Search(len(stats), func(i int) bool { return stats[i].name == b })
if i == len(stats) {
newstat := BucketStat { b, 0 }
stats = append(stats, newstat)
i = len(stats) - 1
}
stats[i].num++
}
return stats, nil
}
// Prints statistics of where lines went when bucketing
func PrintBucketStats(w io.Writer, stats BucketStats) {
var total int
for _, s := range stats {
total += s.num
}
fmt.Fprintf(w, "Copied %d lines\n", total)
fmt.Fprintf(w, "---------------------------------\n")
sort.Sort(stats)
for _, s := range stats {
fmt.Fprintf(w, "Lines in %7s: %2d%%\n", s.name, 100 * s.num / total)
}
}
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