python pyinsane应用

概述importsysfromPILimportImagetry:importsrc.abstractaspyinsaneexceptImportError:importpyinsane.abstractaspyinsanedefset_scanner_opt(scanner,opt,value):print("Setting%sto%s"%(opt,str(value)))try:sc

import sysfrom PIL import Imagetry:   import src.abstract as pyinsaneexcept importError:   import pyinsane.abstract as pyinsanedef set_scanner_opt(scanner, opt, value):   print("Setting %s to %s" % (opt, str(value)))   try:       scanner.options[opt].value = value   except (KeyError, pyinsane.SaneException) as exc:       print("Failed to set %s to %s: %s" % (opt, str(value), str(exc)))if __name__ == "__main__":   steps = False   args = sys.argv[1:]   if len(args) <= 0 or args[0] == "-h" or args[0] == "--help":       print("Syntax:")       print("  %s [-s] <output file (JPG)>" % sys.argv[0])       print("")       print("Options:")       print("  -s : Generate intermediate images (may generate a lot of"             " images !)")       sys.exit(1)   for arg in args[:]:       if arg == "-s":           steps = True           args.remove(arg)   output_file = args[0]   print("Output file: %s" % output_file)   print("Looking for scanners ...")   devices = pyinsane.get_devices()   if (len(devices) <= 0):       print("No scanner detected !")       sys.exit(1)   print("Devices detected:")   print("- " + "\n- ".join([str(d) for d in devices]))   print("")   device = devices[0]   print("Will use: %s" % str(device))   print("")   source = 'auto'   if (device.options['source'].constraint_type           == pyinsane.SaneConstraintType.STRING_List):       if 'auto' in device.options['source'].constraint:           source = 'auto'       elif 'Flatbed' in device.options['source'].constraint:           source = 'Flatbed'   else:       print("Warning: UnkNown constraint type on the source: %d"             % device.options['source'].constraint_type)   set_scanner_opt(device, 'resolution', 300)   set_scanner_opt(device, 'source', source)   set_scanner_opt(device, 'mode', 'color')   print("")   print("Scanning ...  ")   scan_session = device.scan(multiple=False)   if steps and scan_session.scan.expected_size[1] < 0:       print("Warning: requested step by step scan images, but"             " scanner dIDn't report the expected number of lines"             " in the final image --> can't do")       print("Step by step scan images won't be recorded")       steps = False   if steps:       last_line = 0       expected_size = scan_session.scan.expected_size       img = Image.new("RGB", expected_size, "#ff00ff")       sp = output_file.split(".")       steps_filename = (".".join(sp[:-1]), sp[-1])   try:       PROGRESSION_INDICATOR = ['|', '/', '-', '\']       i = -1       while True:           i += 1           i %= len(PROGRESSION_INDICATOR)           sys.stdout.write("\b%s" % PROGRESSION_INDICATOR[i])           sys.stdout.flush()           scan_session.scan.read()           if steps:               next_line = scan_session.scan.available_lines[1]               if (next_line > last_line):                   subimg = scan_session.scan.get_image(last_line, next_line)                   img.paste(subimg, (0, last_line))                   img.save("%s-%05d.%s" % (steps_filename[0], last_line,                                        steps_filename[1]), "JPEG")               last_line = next_line   except EOFError:       pass   print("\b ")   print("Writing output file ...")   img = scan_session.images[0]   img.save(output_file, "JPEG")   print("Done")

 

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