package hocr // TODO: Parse line name to zero pad line numbers, so they can // be sorted easily import ( "image" "image/png" "io/ioutil" "log" "os" "path/filepath" "strings" "rescribe.xyz/go.git/lib/line" ) func getLineText(l OcrLine) (string) { linetext := "" linetext = l.Text if noText(linetext) { linetext = "" for _, w := range l.Words { if w.Class != "ocrx_word" { continue } linetext += w.Text + " " } } if noText(linetext) { linetext = "" for _, w := range l.Words { if w.Class != "ocrx_word" { continue } for _, c := range w.Chars { if c.Class != "ocrx_cinfo" { continue } linetext += c.Text } linetext += " " } } linetext = strings.TrimRight(linetext, " ") linetext += "\n" return linetext } func parseLineDetails(h Hocr, i image.Image, name string) (line.Details, error) { lines := make(line.Details, 0) for _, l := range h.Lines { totalconf := float64(0) num := 0 for _, w := range l.Words { c, err := wordConf(w.Title) if err != nil { return lines, err } num++ totalconf += c } coords, err := boxCoords(l.Title) if err != nil { return lines, err } var ln line.Detail ln.Name = l.Id ln.Avgconf = (totalconf / float64(num)) / 100 ln.Text = getLineText(l) ln.OcrName = name if i != nil { var imgd line.ImgDirect imgd.Img = i.(*image.Gray).SubImage(image.Rect(coords[0], coords[1], coords[2], coords[3])) ln.Img = imgd } lines = append(lines, ln) } return lines, nil } func GetLineDetails(hocrfn string) (line.Details, error) { var newlines line.Details file, err := ioutil.ReadFile(hocrfn) if err != nil { return newlines, err } h, err := Parse(file) if err != nil { return newlines, err } var img image.Image pngfn := strings.Replace(hocrfn, ".hocr", ".png", 1) pngf, err := os.Open(pngfn) if err != nil { log.Println("Warning: can't open image %s\n", pngfn) } else { defer pngf.Close() img, err = png.Decode(pngf) if err != nil { log.Println("Warning: can't load image %s\n", pngfn) } } n := strings.Replace(filepath.Base(hocrfn), ".hocr", "", 1) return parseLineDetails(h, img, n) } func GetLineBasics(hocrfn string) (line.Details, error) { var newlines line.Details file, err := ioutil.ReadFile(hocrfn) if err != nil { return newlines, err } h, err := Parse(file) if err != nil { return newlines, err } n := strings.Replace(filepath.Base(hocrfn), ".hocr", "", 1) return parseLineDetails(h, nil, n) }