有没有办法使用 Wand（ImageMagick Python 绑定）trim 透明区域？

Question

以下代码会产生错误。

#!/usr/bin/env python

import collections.abc
from wand.image import Image, COMPOSITE_OPERATORS, DISTORTION_METHODS, CHANNELS
from wand.drawing import Drawing

wand_imageText = Image(width=1080,
                   height=1080,
                   background='rgb(0,0,0,0)')

with Drawing() as draw:        
    draw.font = 'Impact'
    draw.font_size = 100
    draw.gravity = 'north_west'
    draw.fill_color = 'rgb(255, 255, 255, 255)' 
    draw.text(0, 0, "Let's rock!")        
    draw(wand_imageText)

wand_imageText.trim(color='rgb(0,0,0,0)',fuzz=0)

wand_imageText.save(filename='C:\Temp\Wand_trim_test.jpg')
wand_imageText.close()

File "C:\Program Files\Python37\lib\site-packages\wand\image.py", line 865, in wrapped result = function(self, *args, **kwargs) File "C:\Program Files\Python37\lib\site-packages\wand\image.py", line 4444, in trim with color or self[0, 0] as color: AttributeError: enter

有什么方法可以使用 Wand trim 透明度吗？

Answer 1

我发现我做错了什么。

trim 函数的颜色参数必须是 wand.color.Color 对象，函数才能工作。

以下代码使用了 fmw42 关于使用 rgba() 的建议，trim使用 alpha 值。

from wand.color import Color

wand_imageText.trim(color=Color('rgba(0,0,0,0)'),fuzz=0)

有没有办法使用 Wand（ImageMagick Python 绑定）trim 透明区域？

Is there a way to trim transparent areas using Wand (the ImageMagick Python binding)?

python

imagemagick

wand