"""OCR in Python using the Tesseract engine from Googlehttp://code.google.com/p/pytesser/by Michael J.T. O‘KellyV 0.0.1, 3/10/07"""import Imageimport subprocessimport utilimport errorstesseract_exe_name = ‘tesseract‘ # Name of executable to be called at command linescratch_image_name = "temp.bmp" # This file must be .bmp or other Tesseract-compatible formatscratch_text_name_root = "temp" # Leave out the .txt extensioncleanup_scratch_flag = False  # Temporary files cleaned up after OCR operationdef call_tesseract(input_filename, output_filename):    """Calls external tesseract.exe on input file (restrictions on types),    outputting output_filename+‘txt‘"""    args = [tesseract_exe_name, input_filename, output_filename]    proc = subprocess.Popen(args)    retcode = proc.wait()    if retcode!=0:        errors.check_for_errors()def image_to_string(im, cleanup = cleanup_scratch_flag):    """Converts im to file, applies tesseract, and fetches resulting text.    If cleanup=True, delete scratch files after operation."""    try:        util.image_to_scratch(im, scratch_image_name)        call_tesseract(scratch_image_name, scratch_text_name_root)        text = util.retrieve_text(scratch_text_name_root)    finally:        if cleanup:            util.perform_cleanup(scratch_image_name, scratch_text_name_root)    return textdef image_file_to_string(filename, cleanup = cleanup_scratch_flag, graceful_errors=True):    """Applies tesseract to filename; or, if image is incompatible and graceful_errors=True,    converts to compatible format and then applies tesseract.  Fetches resulting text.    If cleanup=True, delete scratch files after operation."""    try:        try:            call_tesseract(filename, scratch_text_name_root)            text = util.retrieve_text(scratch_text_name_root)        except errors.Tesser_General_Exception:            if graceful_errors:                im = Image.open(filename)                text = image_to_string(im, cleanup)            else:                raise    finally:        if cleanup:            util.perform_cleanup(scratch_image_name, scratch_text_name_root)    return text    if __name__==‘__main__‘:    im = Image.open(‘phototest.tif‘)    text = image_to_string(im)    print text    try:        text = image_file_to_string(‘fnord.tif‘, graceful_errors=False)    except errors.Tesser_General_Exception, value:        print "fnord.tif is incompatible filetype.  Try graceful_errors=True"        print value    text = image_file_to_string(‘fnord.tif‘, graceful_errors=True)    print "fnord.tif contents:", text    text = image_file_to_string(‘fonts_test.png‘, graceful_errors=True)    print text　　　

from pytesser import *im = Image.open(‘fonts_test.png‘)text = image_to_string(im)print "Using image_to_string(): "print texttext = image_file_to_string(‘fonts_test.png‘, graceful_errors=True)print "Using image_file_to_string():"print text