python让图片按照exif信息里的创建时间进行排序的方法

本文实例讲述了python让图片按照exif信息里的创建时间进行排序的方法。分享给大家供大家参考。具体分析如下:

我们经常会从不同的设备里取出照片,比如照相机,手机,iphone等等,操作系统记录的创建日期经常 会因为拷贝等原因变动,下面的代码可以给图片按照exif里的创建时间进行排序,非常有用。

代码如下:

import os
import shutil
import image
from pil.exiftags import tags
def print_all_known_exif_tags():
for k in sorted(tags):
print k, tags[k]
def print_all_exif_tags(image):
try:
img = image.open(image)
except exception, e:
print image, “skipping due to”, e
else:
xf = img._getexif()
for tag in xf:
print tags.get(tag), xf[tag]
finally:
print ‘done’
def get_minimum_creation_time(exif_data):
mtime = “?”
if 306 in exif_data and exif_data[306] < mtime: # 306 = datetime mtime = exif_data[306] if 36867 in exif_data and exif_data[36867] < mtime: # 36867 = datetimeoriginal mtime = exif_data[36867] if 36868 in exif_data and exif_data[36868] < mtime: # 36868 = datetimedigitized mtime = exif_data[36868] return mtime def get_creationdate_with_filename_as_dict(list_of_folders): print "processing all image files in:" result = {} for folder in list_of_folders: print "- " + folder counter = 0 for f in os.listdir(folder): counter += 1 fullfilename = folder + "\\" + f try: img = image.open(fullfilename) except exception, e: print " skipping '%s' due to exception: %s"%(f, e) continue mtime = get_minimum_creation_time(img._getexif()) i = 0 while mtime+"_"*i in result: i += 1 mtime = mtime+"_"*i result[mtime] = fullfilename print " found %s orignal files in %s."%(counter, folder) print "added total of %s to dictionary."%len(result) return result def copy_from_image_dict_to_directory(image_dict, output_dir): assert os.path.exists(output_dir) for i,key in enumerate(sorted(image_dict)): dummy, extension = os.path.splitext(image_dict[key]) new_file_name = key.replace(":", "-") + extension output_file = output_dir + new_file_name shutil.copy2(image_dict[key], output_file) print "copied %s files to %s"%(i+1, output_dir) if __name__=="__main__": source_dir = "/var/tmp/images" output_dir = "/var/tmp/output" # obtain /var/tmp/images/iphone, /var/tmp/images/canonpowershot, /var/tmp/images/nikon1 list_of_folders = [source_dir + subfolder for subfolder in os.listdir(source_dir)] all_files = get_creationdate_with_filename_as_dict(list_of_folders) copy_from_image_dict_to_directory(all_files, output_dir)

希望本文所述对大家的python程序设计有所帮助。

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