向图像添加填充以使它们具有相同的形状

2022-01-09 00:00:00 python opencv computer-vision image-processing image

问题描述

我有一组不同尺寸的图片(45,50,3), (69,34,3), (34,98,3).我想为这些图像添加填充，如下所示:

l have a set of images of different sizes (45,50,3), (69,34,3), (34,98,3). l want to add padding to these images as follows:

取整张图片的最大宽度和长度，然后把图片放在那个尺寸

Take the max width and length of the whole images then put the image in that size

import os
import glob
import cv2

input_path="/home/images"
os.chdir(indput_path)
images=glob.glob("*.png")
Length=[]
Width=[]
for img in images:
    img=cv2.imread(img)
    width,length=img.shape[0:2]
    Length.append(length)
    Width.append(width)
W=max(Width)
L=max(Length)

如何在 opencv 中添加填充以使所有图像具有相同的大小?在示例中 l 给出的图像将得到 (69,98,3)

How can l add padding in opencv so that all the images will have the same size? In the example l gave the images will get the shape of (69,98,3)

解决方案

你可以使用:

image = cv2.copyMakeBorder(src, top, bottom, left, right, borderType)

src 是你的源图片，top、bottom、left、right 是图像周围的填充.

Where src is your source image and top, bottom, left, right are the padding around the image.

您可以在 while 循环中使用 max(sizes) - 图像的大小值来为每个图像添加填充.边框类型可以是以下之一:

You can use max(sizes) - size value of the image in a while loop to add the padding to each image. The bordertype can be one of these:

  • cv2.BORDER_CONSTANT
  • cv2.BORDER_REFLECT
  • cv2.BORDER_REFLECT_101
  • cv2.BORDER_DEFAULT
  • cv2.BORDER_REPLICATE
  • cv2.BORDER_WRAP

cv2.copyMakeBorder 教程

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