【python脚本】批量修改图片尺寸
# -*- coding: utf-8 -*-
"""
Created on Thu Aug 23 16:06:35 2018
@author: libo
"""
from PIL import Image
import os
def image_resize(image_path, new_path): # 统一图片尺寸
print('============>>修改图片尺寸')
for img_name in os.listdir(image_path):
img_path = image_path + "/" + img_name # 获取该图片全称
image = Image.open(img_path) # 打开特定一张图片
image = image.resize((3840, 2160)) # 设置需要转换的图片大小
# process the 1 channel image
image.save(new_path + '/'+ img_name)
print("end the processing!")
if __name__ == '__main__':
print("ready for :::::::: ")
ori_path = r"/home/yjq/Research_data/wurenji_putao/test" # 输入图片的文件夹路径
new_path = '/home/yjq/Research_data/wurenji_putao/test/resize' # resize之后的文件夹路径
image_resize(ori_path, new_path)
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【python脚本】python代码按帧提取提取视频保存为图片
代码一:
import cv2
import os
#要提取视频的文件名,隐藏后缀
sourceFileName='../wurenji_putao/DJI_0009'
#在这里把后缀接上
video_path = os.path.join("", "", sourceFileName+'.MP4')
times=0
#提取视频的频率,每25帧提取一个
frameFrequency=25
#输出图片到当前目录vedio文件夹下
outPutDirName=''+sourceFileName+'/'
if not os.path.exists(outPutDirName):
#如果文件目录不存在则创建目录
os.makedirs(outPutDirName)
camera = cv2.VideoCapture(video_path)
while True:
times+=1
res, image = camera.read()
if not res:
print('not res , not image')
break
if times%frameFrequency==0:
cv2.imwrite(outPutDirName + str(times)+'.jpg', image)
print(outPutDirName + str(times)+'.jpg')
print('图片提取结束')
camera.release()
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代码二:
import cv2
vidcap = cv2.VideoCapture('../wureji_putao/DJI_0009.MP4')
success,img = vidcap.read()
count = 0
success = True
while success :
success,image = vidcap.read()
cv2.imwrite("frame%d.jpg" % count, image)
if cv2.waitKey(10) == 27:
break
count += 1
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代码三:
# import sys
# sys.path.remove('/opt/ros/kinetic/lib/python2.7/dist-packages')
import cv2
vc = cv2.VideoCapture('../wurenji_putao/DJI_0010.MP4') # 读入视频文件,命名cv
n = 1 # 计数
if vc.isOpened(): # 判断是否正常打开
rval, frame = vc.read()
else:
rval = False
timeF = 10 # 视频帧计数间隔频率
i = 259
while rval: # 循环读取视频帧
rval, frame = vc.read()
if (n % timeF == 0): # 每隔timeF帧进行存储操作
i += 1
print(i)
cv2.imwrite('../wurenji_putao/DJI_0010/{}.jpg'.format(i), frame) # 存储为图像
n = n + 1
cv2.waitKey(1)
vc.release()
作者:放羊Wa
链接:https://juejin.cn/post/7079991930435665927
来源:稀土掘金
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