gosseract finds no text where tesseract does

[jhinrichsen]

Summary

I am running tesseract and gosseract on the same image, a single line of text. Tesseract finds the text, gosseract does not.

Reproducibility

Reproducibility Frequency

• 100%

1. Run tesseract d2.pbm - --psm 13 and it will show the output
2. Run go run main.go and it will not show any output

go.mod:

module gosstest

go 1.19

require github.com/otiai10/gosseract/v2 v2.4.0

main.go:

package main

import (
	"fmt"
	"os"

	"github.com/otiai10/gosseract/v2"
)

func main() {
	const (
		want     = "BPJAZGAP"
		filename = "d2.pbm"
	)
	buf, err := os.ReadFile("d2.pbm")
	if err != nil {
		fmt.Fprintf(os.Stderr, "error reading %q: %v\n", filename, err)
	}

	fmt.Fprintln(os.Stderr, gosseract.Version())

	ocr := gosseract.NewClient()
	defer ocr.Close()
	ocr.SetPageSegMode(gosseract.PSM_RAW_LINE) // --psm 13
	ocr.SetImageFromBytes(buf)
	got, err := ocr.Text()
	if err != nil {
		fmt.Fprintf(os.Stderr, "%v\n", err)
	}

	if want != got {
		fmt.Fprintf(os.Stderr, "want %q but got %q", want, got)
	}

	fmt.Println(got)
}

d2.pbm:

P1 42 8
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
0 1 1 1 0 0 1 1 1 0 0 0 0 1 1 0 0 1 1 0 0 1 1 1 1 0 0 1 1 0 0 0 1 1 0 0 1 1 1 0 0 0
0 1 0 0 1 0 1 0 0 1 0 0 0 0 1 0 1 0 0 1 0 0 0 0 1 0 1 0 0 1 0 1 0 0 1 0 1 0 0 1 0 0
0 1 1 1 0 0 1 0 0 1 0 0 0 0 1 0 1 0 0 1 0 0 0 1 0 0 1 0 0 0 0 1 0 0 1 0 1 0 0 1 0 0
0 1 0 0 1 0 1 1 1 0 0 0 0 0 1 0 1 1 1 1 0 0 1 0 0 0 1 0 1 1 0 1 1 1 1 0 1 1 1 0 0 0
0 1 0 0 1 0 1 0 0 0 0 1 0 0 1 0 1 0 0 1 0 1 0 0 0 0 1 0 0 1 0 1 0 0 1 0 1 0 0 0 0 0
0 1 1 1 0 0 1 0 0 0 0 0 1 1 0 0 1 0 0 1 0 1 1 1 1 0 0 1 1 1 0 1 0 0 1 0 1 0 0 0 0 0
0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0

Environment

Linux chieftec 6.0.15-300.fc37.x86_64 #1 SMP PREEMPT_DYNAMIC Wed Dec 21 18:33:23 UTC 2022 x86_64 x86_64 x86_64 GNU/Linux

GO111MODULE=""
GOARCH="amd64"
GOBIN=""
GOCACHE="/home/jot/.cache/go-build"
GOENV="/home/jot/.config/go/env"
GOEXE=""
GOEXPERIMENT=""
GOFLAGS=""
GOHOSTARCH="amd64"
GOHOSTOS="linux"
GOINSECURE=""
GOMODCACHE="/home/jot/go/pkg/mod"
GONOPROXY=""
GONOSUMDB=""
GOOS="linux"
GOPATH="/home/jot/go"
[project.zip](https://github.com/otiai10/gosseract/files/10347142/project.zip)

GOPRIVATE=""
GOPROXY="direct"
GOROOT="/usr/lib/golang"
GOSUMDB="off"
GOTMPDIR=""
GOTOOLDIR="/usr/lib/golang/pkg/tool/linux_amd64"
GOVCS=""
GOVERSION="go1.19.4"
GCCGO="gccgo"
GOAMD64="v1"
AR="ar"
CC="gcc"
CXX="g++"
CGO_ENABLED="1"
GOMOD="/home/jot/work/gosseract/go.mod"
GOWORK=""
CGO_CFLAGS="-g -O2"
CGO_CPPFLAGS=""
CGO_CXXFLAGS="-g -O2"
CGO_FFLAGS="-g -O2"
CGO_LDFLAGS="-g -O2"
PKG_CONFIG="pkg-config"
GOGCCFLAGS="-fPIC -m64 -pthread -Wl,--no-gc-sections -fmessage-length=0 -fdebug-prefix-map=/tmp/go-build1563688176=/tmp/go-build -gno-record-gcc-switches"

go version go1.19.4 linux/amd64

tesseract 5.2.0
 leptonica-1.82.0
  libgif 5.2.1 : libjpeg 6b (libjpeg-turbo 2.1.3) : libpng 1.6.37 : libtiff 4.4.0 : zlib 1.2.12 : libwebp 1.2.4
 Found AVX2
 Found AVX
 Found FMA
 Found SSE4.1

[jhinrichsen]

project.zip

[noahsilverman]

I have the same issue. Was this ever resolved?