目录
- 前言
- 1.cv2
- 1.1 导包
- 1.2 路径设置
- 1.3 改格式重新传
- 1.4 检察效果
- 2.pillow
- 2.1 导包
- 2.2 路径设置
- 2.3 写格式修改函数
- 2.4 开始转换
- 2.5 检察效果
前言
常见的图像使命通常必要把照片统一成雷同的格式，以是此文章正是为了统一格式而生，常见的主要有cv2和PIL.Image的相干操纵，照片格式是一串数字加上后缀名
1.cv2
pip install opencv-python之后就可以import cv2
1.1 导包
- import os
- import cv2
- import sys
- import numpy as np
1.2 路径设置
- path = r"C:\\Users\\86775\\PycharmProjects\\pythonProject2\\ResNet\\test_change\"
- path2 = r"C:\\Users\\86775\\PycharmProjects\\pythonProject2\\ResNet\\test_change2\"
1.3 改格式重新传
1.3.1 用os.path.splitext()来判定- images = os.listdir(path)
- for i in os.listdir(path):
- print(os.path.splitext(i)) # ('34474006827920603', '.png')
- if os.path.splitext(i)[1] == ".jpeg":
- img = cv2.imread(path + i)
- # print(img)
- new_imagename = i.replace(".jpeg", ".jpg")
- cv2.imwrite(path2 + new_imagename, img)
-
- elif os.path.splitext(i)[1] == ".png":
- img = cv2.imread(path + i)
- # print(img)
- new_imagename = i.replace(".png", ".jpg")
- cv2.imwrite(path2 + new_imagename, img)
-
- elif os.path.splitext(i)[1] == ".JPG":
- img = cv2.imread(path + i)
- # print(img)
- new_imagename = i.replace(".JPG", ".jpg")
- cv2.imwrite(path2 + new_imagename, img)
-
- elif os.path.splitext(i)[1] == ".PNG":
- img = cv2.imread(path + i)
- # print(img)
- new_imagename = i.replace(".PNG", ".jpg")
- cv2.imwrite(path2 + new_imagename, img)
-
- elif os.path.splitext(i)[1] == ".jpg":
- img = cv2.imread(path + i)
- # print(img)
- cv2.imwrite(path2 + i, img)
1.3.2 用split()来判定- images = os.listdir(path)
- for i in os.listdir(path):
- print(i.split("."))
- if i.split(".")[1] == "jpeg":
- img = cv2.imread(path + i)
- # print(img)
- new_imagename = i.replace(".jpeg", ".jpg")
- cv2.imwrite(path2 + new_imagename, img)
-
- elif i.split(".")[1] == "png":
- img = cv2.imread(path + i)
- # print(img)
- new_imagename = i.replace(".png", ".jpg")
- cv2.imwrite(path2 + new_imagename, img)
-
- elif i.split(".")[1] == "JPG":
- img = cv2.imread(path + i)
- # print(img)
- new_imagename = i.replace(".JPG", ".jpg")
- cv2.imwrite(path2 + new_imagename, img)
-
- elif i.split(".")[1] == "PNG":
- img = cv2.imread(path + i)
- # print(img)
- new_imagename = i.replace(".PNG", ".jpg")
- cv2.imwrite(path2 + new_imagename, img)
-
- elif i.split(".")[1] == "jpg":
- img = cv2.imread(path + i)
- # print(img)
- cv2.imwrite(path2 + i, img)
1.4 检察效果
2.pillow
pip install pillow之后就可以from PIL import Image
2.1 导包
- import os
- from PIL import Image
2.2 路径设置
- path1 = r"C:\\Users\\86775\\PycharmProjects\\pythonProject2\\ResNet\\test_change\"
- path2 = r"C:\\Users\\86775\\PycharmProjects\\pythonProject2\\ResNet\\test_change2\"
2.3 写格式修改函数
RGBA意思是赤色，绿色，蓝色，Alpha的色彩空间，Alpha指透明度，而JPG不支持透明度。
以是其他格式不转jpg可以直接生存为.png格式，转jpg就必要抛弃Alpha
img = img.convert(“RGB”)，转换成RGB，包管和jpg格式的通道数雷同，也算一种图片类型变换的防报错机制- def jpeg2jpg(path_in, path_out):
- img = Image.open(path_in)
- img = img.convert("RGB")
- img.save(path_out, "JPEG", quality=80, optimize=True, progressive=True)
-
-
- def png2jpg(path_in, path_out):
- img = Image.open(path_in)
- img = img.convert("RGB")
- img.save(path_out, "JPEG", quality=80, optimize=True, progressive=True)
-
-
- def JPG2jpg(path_in, path_out):
- img = Image.open(path_in)
- img = img.convert("RGB")
- img.save(path_out, "JPEG", quality=80, optimize=True, progressive=True)
-
-
- def PNG2jpg(path_in, path_out):
- img = Image.open(path_in)
- img = img.convert("RGB")
- img.save(path_out, "JPEG", quality=80, optimize=True, progressive=True)
-
-
- def jpg2jpg(path_in, path_out):
- img = Image.open(path_in)
- img = img.convert("RGB")
- img.save(path_out, "JPEG", quality=80, optimize=True, progressive=True)
2.4 开始转换
- images = os.listdir(path1)
- for i in images:
- print(i)
- if os.path.splitext(i)[1] == ".jpeg":
- source = path1 + "\" + str(i.split(".")[0]) + ".jpeg"
- target = path2 + "\" + str(i.split(".")[0]) + ".jpg"
- jpeg2jpg(source, target)
- elif os.path.splitext(i)[1] == ".png":
- source = path1 + "\" + str(i.split(".")[0]) + ".png"
- target = path2 + "\" + str(i.split(".")[0]) + ".jpg"
- png2jpg(source, target)
- elif os.path.splitext(i)[1] == ".JPG":
- source = path1 + "\" + str(i.split(".")[0]) + ".JPG"
- target = path2 + "\" + str(i.split(".")[0]) + ".jpg"
- JPG2jpg(source, target)
- elif os.path.splitext(i)[1] == ".PNG":
- source = path1 + "\" + str(i.split(".")[0]) + ".PNG"
- target = path2 + "\" + str(i.split(".")[0]) + ".jpg"
- PNG2jpg(source, target)
- elif os.path.splitext(i)[1] == ".jpg":
- source = path1 + "\" + str(i.split(".")[0]) + ".jpg"
- target = path2 + "\" + str(i.split(".")[0]) + ".jpg"
- jpg2jpg(source, target)
2.5 检察效果
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