Re: [orca-list] OCR Current Window

[Mallard <mallard ilgerone net>]

Hello there,

Oh, bless you!
This function has been performed by a specific add-on in NvDA for quite 
a while now, and I use it a lot.

It can make quite a bit of difference when ou're working with documents 
that are images only, like pdf or jpg files, where you have text that 
hasn't been ocr'd before.

You can also locate buttons, controls and the like, and left- or right 
click as need be. You can scan the whole window or just an object, which 
you can pre-select...

Jaws has an internal OCR function too, but I don't know how it works, 
because I don't have Jaws on my pc. What I know, though, is that it 
should b based on Omnipage, which is a very bulky programme, though it's 
more accurate than Tesseract.

Please, keep up this project! This would really enhance the usability 
and value of Orca for blind users.

Ciao,
Ollie




Il 26/01/2015 23:28, chrys87 ha scritto:
> Hi Guys,
> i play a little arround with tesserwrap. i dont know if it really make
> sense but maybe someone need this.
> i wrote a little orca-cust for taking a screen shot of the current
> window and pass it through tesseract. just press
> orca + m
> orca will start reading the content of the window (maybe the image
> program or browser with pictures or an other not accessible content) and
> set it to the clipboard.
> You need tesseract tesserwrap, your tesseract-language-pack and orca >=
> 3.14
>
> hier is the cust script for those who are interested in:
>
> # Requiere: tesserwrap, tesseract, orca >=3.14
> # -*- coding: utf-8 -*-
>
> #Python
> import os
> from PIL import Image
> import locale
>
> #tesseract
> from tesserwrap import tesseract
>
> #GTK/GDK
> from gi.repository import Gtk, Gdk
>
> # Orca
> import orca.orca
> import orca.input_event
> import orca.settings
> import orca.keybindings
> import orca.speech
> import orca.braille
>
> #Settings-
> #this is need by arch for correct braille
> orca.settings.tty = 1
> #Settings+
>
> #Bind Function to key-
> myKeyBindings = orca.keybindings.KeyBindings()
>
> def DefineShortcut(pHandle,pShortcut):
>      myKeyBindings.add(orca.keybindings.KeyBinding(
>          pShortcut,
>          1 << orca.keybindings.MODIFIER_ORCA,
>          1 << orca.keybindings.MODIFIER_ORCA,
>          pHandle))
>      orca.settings.keyBindingsMap["default"] = myKeyBindings
> #Bind Function to key+
>
> #OCRPath-
> def ocr_path(path):
>      img = Image.open(path)
>      tr = tesseract("/usr/share")
>      new_string = tr.ocr_image(img)
>      return new_string
> #OCRPath+
>
> #Set to Clipboard
> def setTextToClipboard(text):
>      ClipboardObj = Gtk.Clipboard.get(Gdk.SELECTION_CLIPBOARD)
>      ClipboardObj.set_text(text, -1)
>
> #Display Message-
> #Speak or Braille
> def outputMessage(Message):
>      if (orca.settings.enableSpeech):
>          orca.speech.speak(Message)
>      if (orca.settings.enableBraille):
>          orca.braille.displayMessage(Message)
> #Display Message+
>
> #OCR Current Window-
> def ocrWindow(script, inputEvent=None):
>      os.popen('gnome-screenshot -w -f "/tmp/orca-currwindow.png"').read()
>      locale.setlocale(locale.LC_NUMERIC, 'C')
>      OCRText = ocr_path("/tmp/orca-currwindow.png")
>      setTextToClipboard(OCRText)
>      outputMessage(OCRText)
>      return True
> #OCR Current Window+
>
> # define OcrHandler-
> ocrWindowHandler = orca.input_event.InputEventHandler(
>      ocrWindow, "OCR Current window") #OCR the current window
> # define OcrHandler+
>
>
> DefineShortcut(ocrWindowHandler,"m"); #Shortcut Orca + m
>
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> The manual is at
> http://library.gnome.org/users/gnome-access-guide/nightly/ats-2.html
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