我试图在PyQt5中的QLabel中渲染WSQ图像。 WSQ映像位于xml文件中,该文件位于zip文件中。这是我的方法:
import zipfile
import xml.etree.cElementTree as ET
import base64.b64decode as b64decode
from PyQt5 import QtGui, QtWidgets
...
try:
with zipfile.ZipFile(zfilename) as src_zip:
root = ET.fromstring(src_zip.open(xmlfilename).read())
except zipfile.BadZipFile as e:
root = None
finger_prints = []
if root:
for data in root.findall('.//Demographics/FingerData'):
finger_prints.append(b64decode(data.find('FingerprintImage').text))
...
finger_data = finger_prints.pop()
pixmap = QtGui.QPixmap()
pixmap.loadFromData(finger_data, 'WSQ') # freezes
QtWidgets.QLabel().setPixmap(pixmap)
第二行但最后一行导致程序冻结/挂起,但如果我这样做:
with file('/tmp/finger_print.wsq', 'wb') as f:
f.write(finger_data)
我能够在WSQ查看器中查看图像。我知道Qt有不同图像格式的插件,是否有我缺少的图像插件?
提前感谢您的帮助。
,亚伯拉罕。
答案 0 :(得分:1)
image formats Qt默认支持:
Format Description Qt's support
BMP Windows Bitmap Read/write
GIF Graphic Interchange Format (optional) Read
JPG Joint Photographic Experts Group Read/write
JPEG Joint Photographic Experts Group Read/write
PNG Portable Network Graphics Read/write
PBM Portable Bitmap Read
PGM Portable Graymap Read
PPM Portable Pixmap Read/write
XBM X11 Bitmap Read/write
XPM X11 Pixmap Read/write
所以你要么必须写custom Qt image plugin,要么以某种方式将图像数据转换为Qt理解的格式之一。