python twain 扫描

def multiScan(self):

    """ Scan and return an array of PIL objects

        If no images, will return an empty array

    """

    self.scanner.RequestAcquire(0, 1)

    images = []

    handles = []

    try:

        handle, more = self.scanner.XferImageNatively()

        handles.append(handle)

    except twain.excDSTransferCancelled:

        return []

    while more != 0:

        try:

            handle, more = self.scanner.XferImageNatively()

            handles.append(handle)

        except twain.excDSTransferCancelled:

            more = 0

    for handle in handles:

        images.append(Image.open(StringIO(twain.DIBToBMFile(handle))))

        twain.GlobalHandleFree(handle)

    return images

import twain

sm = twain.SourceManager(0)

ss = sm.OpenSource()

for i in range(3):  //for ex. 3 documents in the scanner device

   ss.RequestAcquire(0,0)

   rv = ss.XferImageNatively()

   if rv:

       (handle, count) = rv

       twain.DIBToBMFile(handle, '{i}.bmp'.format(i))

import twain

sm = twain.SourceManager(0)

sm.SetCallback(onTwainEvent)

ss = sm.OpenSource()

index = 0

for i in range(3):  //for ex. 3 documents in the scanner device

   ss.RequestAcquire(0,0)

def onTwainEvent(event):

    if event == twain.MSG_XFERREADY:

        saveImage()

def saveImage():

    rv = ss.XferImageNatively()

    if rv:

        (handle, count) = rv

        twain.DIBToBMFile(handle, '{index}.bmp'.format(index))

        index += 1

import twain

sm = twain.SourceManager(0)

ss = sm.OpenSource()

ss.RequestAcquire(0,0)

rv = ss.XferImageNatively()

if rv:

(handle, count) = rv

twain.DIBToBMFile(handle, 'image.bmp')