如何將文件夾中的所有圖像垂直合併/附加/堆疊/粘貼到新圖像 (How to merge/append/stack/paste all images in folder vertically to a new image)

問題描述

如何將文件夾中的所有圖像垂直合併/附加/堆疊/粘貼到新圖像 (How to merge/append/stack/paste all images in folder vertically to a new image)

我想合併一個文件夾中的所有圖片並將它們堆疊，水平附加。

import os
from PIL import Image
allfiles = os.listdir(os.getcwd())
imlist =[filename for filename in allfiles if filename[‑4:] in [".png", ".PNG"]]
N = len(imlist)
w, h = Image.open(imlist[0]).size

total_width = w * N
max_height = h

new_im = Image.new('RGB', (total_width, max_height))

for i in range(1,N):
    img = Image.open(imlist[i])
    offset = 0
    appendedimages.paste(img, (x_offset,0))
    offset += img.size[0]

appendedimages.save('test.jpg')

看起來，使用這個，它只顯示最後一張圖片。有人知道為什麼會這樣嗎？

我也試過

import cv2
import os
import numpy as np


allfiles = os.listdir(os.getcwd())
imlist =[filename for filename in allfiles if filename[‑4:] in [".png", ".PNG"]]
N = len(imlist)
for i in range(1,N):
    img = cv2.imread(imlist[i])

horizontalAppendedImg = np.hstack(img)
cv2.imshow('Horizontal Appended', horizontalAppendedImg)
cv2.waitKey(0)
cv2.destroyAllWindows()

但這也不起作用。

誰能幫我解決這個問題？還是有更簡單的解決方案？

參考解法

方法 1:

images are numpy arrays. As long as they have the same dimensions, you can np.hstack them.

imlist =[cv2.imread(filename) for filename in allfiles if filename[‑4:] in [".png", ".PNG"]]

concat_img = np.hstack(imlist)

cv2.imshow('Horizontal Appended', concat_img)

cv2.waitKey(0)

cv2.destroyAllWindows()

</code></pre>
Explanation:


read in all images into a list with list comprehension: list of images/np.arrays
use np.hstack() to concatenate all images along the horizontal dimension. You could use more general concatenation tools with np.concatenate() or np.stack() if you run into issues.
(by Jolanthan、Dorian)
參考文件


How to merge/append/stack/paste all images in folder vertically to a new image (CC BY‑SA 2.5/3.0/4.0)