如何通过 Python 子文件夹中的图像文件目录迭代图像处理？

Question

在如何连接迭代列表（声明为 fileListL）方面需要帮助，该列表是从子目录（左）中的一系列图像文件动态构建的，并循环直到到达帧范围的末尾。所有脚本都在单个帧上按预期工作，但我无法让它循环多个帧。想法，想法？

# this module runs within a root directory that contains one sub folder named 'left' and 15 sub folders expressed in the dirL as ('left/01','left/02, . . . .)
# each folder can have any number of sequential .jpg images in the format 'name.0000.jpg'

import os
import sys
import glob
import Image
from itertools import izip, count

# create Master List of files in Left Directories along with a count of files

global fileListL
fileListL = []
for root, dirs, files in os.walk(r'left/'):
    for file in files:
        if file.endswith('.jpg'):
                fileListL.append('left/'+file)
print fileListL

# Iterator
global inFrame
global outFrame
inFrame = 'left/test.0000.jpg' # testing temp needs dynamic variable, trying to use fileList L list to dynamically increment thru frames
outFrame = inFrame[5:-5]
crops = ((0, 0, 1920, 1080),(1920, 0, 3840, 1080), (3840, 0, 5760, 1080), (5760, 0, 7680, 1080), (7680, 0, 9600, 1080), (9600, 0, 11520, 1080), (11520, 0, 13440, 1080), (13440, 0, 15360, 1080), (15360, 0, 17280, 1080), (17280, 0, 19200, 1080), (19200, 0, 21120, 1080), (21120, 0, 23040, 1080), (23040, 0, 24960, 1080), (24960, 0, 26880, 1080), (26880, 0, 28800, 1080))
quads = ('01_', '02_', '03_', '04_', '05_', '06_', '07_', '08_', '09_', '10_', '11_', '12_', '13_', '14_', '15_')
dirL= ('left/01/', 'left/02/', 'left/03/', 'left/04/', 'left/05/', 'left/06/', 'left/07/', 'left/08/', 'left/09/', 'left/10/', 'left/11/', 'left/12/', 'left/13/', 'left/14/', 'left/15/')

for i in fileListL:
    for infile in glob.glob( os.path.join(inFrame) ):
        print "current file is: " + infile
        oL = Image.open(inFrame) # needs dynamic variable for frames
        for i, each_quad, each_frame, each_dirL in izip(count(), crops, quads, dirL):
            print i, each_quad, each_frame, each_dirL
            frame = oL.crop(((each_quad)))
            frame.save((each_dirL)+(each_frame)+(outFrame)+'.png')

Answer 1

您的代码中有很多“复制和粘贴”错误，难以理解其目的。

• 嵌套的for 循环使用同名的循环变量 (i)。
• os.path.join(inFrame) 需要一个包含路径组件的列表，inFrame 似乎是一个字符串
• 第一个 for 循环 (for i in fileListL) 的目的是什么，好像您正在丢弃 i。
• 等等……

请使用您的文件树布局和适用于单个文件的步骤更新问题，也许我们可以帮助您。

[更新]

似乎您的代码可以简化为：

for i, file_name in enumerate(glob.glob('left/*.jpg')):
    out_frame = 'left/%02d/%s.png' % (i+1, file_name[5:-5])
    print "current input file is: '%s', output file is: %s" % (file_name, out_frame)
    img = Image.open(file_name)
    for i, crop in enumerate(crops):
        frame = img.crop(crop)
        frame.save(out_frame)

这是未经测试的代码，只是为了给你指明正确的方向。