python - Python中带有图像的宝丽来效果

Question

我正在尝试拍摄图像并从 imagemagick http://www.imagemagick.org/Usage/transform/#polaroid添加以下效果。我搜索了 Python 代码示例并没有成功。我不需要使用 imagemagick(wand, pythonmagick, etc.) 这只是我能找到的唯一例子。我不想使用列出的命令行示例。我希望能够将它包含在我的照相亭 python 代码中。

Answer 1

使用wand，您将需要实现 C-API 方法MagickPolaroidImage&MagickSetImageBorderColor

import ctypes

from wand.api import library
from wand.color import Color
from wand.drawing import Drawing
from wand.image import Image

# Tell Python about C library
library.MagickPolaroidImage.argtypes = (ctypes.c_void_p,  # MagickWand *
                                        ctypes.c_void_p,  # DrawingWand *
                                        ctypes.c_double)  # Double

library.MagickSetImageBorderColor.argtypes = (ctypes.c_void_p,  # MagickWand *
                                              ctypes.c_void_p)  # PixelWand *


# Define FX method. See MagickPolaroidImage in wand/magick-image.c
def polaroid(wand, context, angle=0.0):
    if not isinstance(wand, Image):
        raise TypeError('wand must be instance of Image, not ' + repr(wand))
    if not isinstance(context, Drawing):
        raise TypeError('context must be instance of Drawing, not ' + repr(context))
    library.MagickPolaroidImage(wand.wand,
                                context.resource,
                                angle)

# Example usage
with Image(filename='rose:') as image:
    # Assigne border color
    with Color('white') as white:
        library.MagickSetImageBorderColor(image.wand, white.resource)
    with Drawing() as annotation:
        # ... Optional caption text here ...
        polaroid(image, annotation)
    image.save(filename='/tmp/out.png')