Python 合并多张图片至一张图片

PDF 有多页，一次性转成JPG 图片，JAVA 报内存溢出，
现改为，每一页存成一张图片，然后再将多张图片合成一张图片。

安装库

pip3 install Image -i https://pypi.tuna.tsinghua.edu.cn/simple

cv2.imread()不支持中文路径, 如果有中文读出来会是 None

# coding=utf-8
from PIL import Image
import cv2
import numpy as np


def merge(img_array, direction="horizontal", gap=0):
    img_array = [Image.fromarray(img) for img in img_array]
    w, h = img_array[0].size
    if direction == "horizontal":
        result = Image.new(img_array[0].mode, ((w + gap) * len(img_array) - gap, h))
        for i, img in enumerate(img_array):
            result.paste(img, box=((w + gap) * i, 0))
    elif direction == "vertical":
        result = Image.new(img_array[0].mode, (w, (h + gap) * len(img_array) - gap))
        for i, img in enumerate(img_array):
            result.paste(img, box=(0, (h + gap) * i))
    else:
        raise ValueError("The direction parameter has only two options: horizontal and vertical")
    return np.array(result)


if __name__ == '__main__':
    img_list = []
    for i in range(0, 10):
        img = cv2.imread("D:\\Users\\Pictures\\4\\%s.PNG" % (i + 1))
        img_list.append(img)
    img = merge(img_list, "vertical")
    cv2.imwrite("MergeImage.png", img)

源图

合并后的图