来自文件内容的 QImage [英] QImage from file content

问题描述

我的数据库中有一个表格，其中包含有关图像的信息(如宽度、高度、内容类型、文件类型和文件内容).在 file_content 列中存储了整个图像(不是像素数据或其他东西 - 整个文件被读取并存储为二进制数据).现在我想在 Python+PySide 上的应用程序中从此记录创建 QImage(或 QPixmap).我该怎么做?

I have a table in my DB which contains information about images (like width, height, content-type, file-type and file content). In column file_content stored entire image (not pixel data or something else - entire file readed and stored as binary data). Now I want to create QImage (or QPixmap) from this record in my application on Python+PySide. How can I do it?

我尝试了 loadFromData，但它需要原始像素数据，而不是像我这样的带有标题的文件.

I tried loadFromData, but it is expects raw pixel data, not file with header like in my case.

其实我也不知道热解.

UPD:我的代码示例不起作用:

UPD: My code sample which does not works:

    with open('Koala.jpg', 'r') as f:
        content = f.read()

    self.image = QtGui.QImage()

    print self.image.loadFromData(content)

结果:

False
Corrupt JPEG data: 1 extraneous bytes before marker 0xd9
JPEG datastream contains no image

推荐答案

这种愚蠢的错误！只需将 with open('Koala.jpg', 'r') as f: 替换为 with open('Koala.jpg', 'rb') as f: 和loadFromData 加载了我的图片.

Such a silly mistake! Just replaced with open('Koala.jpg', 'r') as f: with with open('Koala.jpg', 'rb') as f: and loadFromData loaded my images.

永远不要忘记以二进制形式打开图像文件！

Never forget to open image files as binary!

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