python-opencv如何读取图片及尺寸修改

import cv2
img=cv2.imread('1.jpg')
print(img.shape)
res=cv2.resize(img,(126,126))#修改图像尺寸
cv2.imshow('new_img',res)#显示新图像
cv2.imshow('img',img)#依旧显示原始图像，进行对比
#cv2.imwrite('new_img_path',res)
cv2.waitKey(0)
cv2.destoryAllWindows()

import cv2
import os

outtype = '.png'  #   <---------- 输出的统一格式
image_size_h =0
image_size_w = 300  #  <---------- 设定长
source_path = "E:\\domo\\pic"+"\\"  #  <---------- 源文件路径
target_path = "E:\\domo\\newdomo"+"\\"  #  <---------- 输出目标文件路径
 
if not os.path.exists(target_path):
    os.makedirs(target_path)
 
image_list = os.listdir(source_path)  # 获得文件名
 
i = 0
for file in image_list:
    i = i + 1
    image_source = cv2.imread(source_path + file)  # 读取图片d
    print("处理中-->",file)
    if image_source.shape[0] == image_source.shape[1]:    #图片是正方形
        image_size_h = image_size_w
        image = cv2.resize(image_source, (image_size_w, image_size_h), 0, 0, cv2.INTER_LINEAR)  # 修改尺寸
        # cv2.imwrite(target_path + str(i) + outtype, image)  # 重命名并且保存 (统一图片格式)
        cv2.imwrite(target_path + str(file),image)  # 保留原命名
    else:   #图片是非方形
        sizenum = image_source.shape[0]/image_source.shape[1]
        image_size_h =sizenum * image_size_w 
        image = cv2.resize(image_source, (image_size_w, int(image_size_h)), 0, 0, cv2.INTER_LINEAR)  # 修改尺寸
        # cv2.imwrite(target_path + str(i) + outtype, image)  # 重命名并且保存 (统一图片格式)
        cv2.imwrite(target_path + str(file),image) # 保留原命名
print("批量处理完成")