如何将wand图像对象转换为打开cv图像（numpy数组） [英] How to convert wand image object to open cv image (numpy array)

问题描述

我使用以下代码导入了魔杖

I have imported wand using the following code

from wand.image import Image as WandImage
from wand.color import Color
with WandImage(filename=source_file, resolution=(RESOLUTION,RESOLUTION)) as img:
    img.background_color = Color('white')
    img.format        = 'tif'
    img.alpha_channel = False

如何转换 img 对象在python中打开cv（cv2）图像对象？

How can i convert img object to open cv (cv2) image object in python?

推荐答案

你只需要写一个字节数组缓冲区，并传递到 cv2.imdecode 。

You would simply write to a byte-array buffer, and pass to cv2.imdecode.

from wand.image import Image as WandImage
from wand.color import Color
import numpy
import cv2

RESOLUTION=72
source_file='rose:'
img_buffer=None

with WandImage(filename=source_file, resolution=(RESOLUTION,RESOLUTION)) as img:
    img.background_color = Color('white')
    img.format        = 'tif'
    img.alpha_channel = False
    # Fill image buffer with numpy array from blob
    img_buffer=numpy.asarray(bytearray(img.make_blob()), dtype=numpy.uint8)

if img_buffer is not None:
    retval = cv2.imdecode(img_buffer, cv2.IMREAD_UNCHANGED)

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