Contents

require "RMagick"
require "pathname"
require "tempfile"

class RTesseract
  VERSION = '0.0.1'

  def initialize(src="", options={})
    @source = Pathname.new src
    @command = options[:command] || "tesseract"
    @options = options
    @value   = ""
  end

  def source= src
    @source = Pathname.new src
    @value = ""
  end

  def image_name
    @source.basename
  end

  #Convert image to tiff
  def image_to_tiff
    tmp_file = Pathname.new(Dir::tmpdir).join("#{@source.basename}.tif").to_s
    cat = Magick::ImageList.new @source.to_s
    cat.write tmp_file.to_s
    return tmp_file
  end

  #Remove files
  def remove_file(files)
    files.each do |file|
      begin
        File.unlink(file) if File.exist?(file)
      rescue
        system "rm -f #{file}"
      end
    end
    true
    rescue
      raise "Error on remove file."
  end

  #Convert image to string
  def convert
    tmp_file  = Pathname.new(Dir::tmpdir).join("#{@source.basename}")
    tmp_image = image_to_tiff
    `#{@command} #{tmp_image} #{tmp_file.to_s}`
    @value = File.read("#{tmp_file.to_s}.txt").to_s
    remove_file([tmp_image,"#{tmp_file.to_s}.txt"])
  rescue
    raise "Error on conversion."
  end

  #Output value
  def to_s
    return @value if @value != ""
    if @source.file?
      convert
      @value
    else
      raise "Select a image file."
    end
  end

  #Remove spaces and break-lines
  def to_s_without_spaces
    to_s.gsub(" ","").gsub("\n","").gsub("\r","")
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
rtesseract-0.0.1	lib/rtesseract.rb