python单通道与三通道互转

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文章目录

• 前言
• 一、pandas是什么？
• 二、使用步骤
  • 1.引入库
  • 2.读入数据
• 总结

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前言

用PIL.Image 来转换通道

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一、单通道转三通道

#单通道转三通道
def one_to_three():
    img_path = r'./test_imgs'
    save_img_path = r'./test_imgs'
    for file in os.listdir(img_path):
        image = Image.open(os.path.join(img_path, file))
        image=image.convert("RGB")
        image.save(os.path.join(save_img_path, file))

二、三通道转单通道

def three_to_one():
    img_path = r'./test_imgs'
    save_img_path = r'./test_imgs'
    for file in os.listdir(img_path):
        image = Image.open(os.path.join(img_path, file))
        image=image.convert("L")
        image.save(os.path.join(save_img_path, file))

三、检查

def check():
    img_path = r'./test_imgs'
    print("begin:")
    for file in os.listdir(img_path):
        image = Image.open(os.path.join(img_path, file))
        print(np.array(image).shape)

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总结

import cv2
from PIL import Image
import os
import numpy as np

def one_to_three():
    img_path = r'./test_imgs'
    save_img_path = r'./test_imgs'
    for file in os.listdir(img_path):
        image = Image.open(os.path.join(img_path, file))
        image=image.convert("RGB")
        image.save(os.path.join(save_img_path, file))

def three_to_one():
    img_path = r'./test_imgs'
    save_img_path = r'./test_imgs'
    for file in os.listdir(img_path):
        image = Image.open(os.path.join(img_path, file))
        image=image.convert("L")
        image.save(os.path.join(save_img_path, file))

def check():
    img_path = r'./test_imgs'
    print("begin:")
    for file in os.listdir(img_path):
        image = Image.open(os.path.join(img_path, file))
        print(np.array(image).shape)

if __name__=="__main__":
    one_to_three()
    check()