直接裁剪图片大小

方法一:
import cv2
image_path = 'D:/program/tool/225.jpg'
im = cv2.imread(image_path)
im = im[0:100, 0:200]  # y1:y2,x1:x2
cv2.imwrite('./225.png', im)

方法二:
from PIL import Image
# 原图太大缩放图片尺寸
img = Image.open('D:/program/tool/dataset_drive/21_training.png')
img.thumbnail((1024, 1024))  # 按比例缩小
img.save('D:/program/tool/dataset_drive/21_1024training.png')  # 保存缩放后的原图

方法三:
from PIL import Image
# 原图太大缩放图片尺寸
img = Image.open('D:/program/tool/dataset_drive/21_training.png')
img = img.resize((1024, 1024), Image.LANCZOS)
img.save('D:/program/tool/dataset_drive/21_1024training.png')  # 保存缩放后的原图

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