Question

我正在尝试使用在图像位置的数据帧上触发并转换这些图像，然后将其保存回同一目录中的功能。

保存图像的数据帧的头部

我定义的函数如下：

from PIL import Image, ImageEnhance

def image_build(img, df):
    for img in df[img]:
        count = 1
        pic = df[img]
        if df['label'].any() == 0:
            im = Image.open(df[img])
            enh = ImageEnhance.Contrast(im)
            im = enh.enhance(1.9)
            im = im.rotate(90)
            im = im.transpose(Image.FLIP_LEFT_RIGHT)
            im = im.resize(224, 224)
            save_dir = 'N:/Users/Howell/Kaggle/X_Ray/chest_xray/train/NORMAL/'
            im.save(save_dir/'new_image_'+count+'.jpeg')
            count += count + 1
            print(count)

然后我尝试使用此功能：

image_build('image', train_data)

但是我遇到以下错误：

> --------------------------------------------------------------------------- KeyError                                  Traceback (most recent call
> last)
> C:\ProgramData\Anaconda3\envs\tensorflowenvironment\lib\site-packages\pandas\core\indexes\base.py
> in get_loc(self, key, method, tolerance)    2656             try:
> -> 2657                 return self._engine.get_loc(key)    2658             except KeyError:
> 
> pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc()
> 
> pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc()
> 
> pandas/_libs/hashtable_class_helper.pxi in
> pandas._libs.hashtable.PyObjectHashTable.get_item()
> 
> pandas/_libs/hashtable_class_helper.pxi in
> pandas._libs.hashtable.PyObjectHashTable.get_item()
> 
> KeyError:
> WindowsPath('N:/Users/Howell/Kaggle/X_Ray/chest_xray/train/NORMAL/IM-0580-0001.jpeg')
> 
> During handling of the above exception, another exception occurred:
> 
> KeyError                                  Traceback (most recent call
> last) <ipython-input-144-d17ac9ecd789> in <module>
> ----> 1 image_build('image', train_data)
> 
> <ipython-input-143-cf988e867715> in image_build(img, df)
>       2     for img in df[img]:
>       3         count = 1
> ----> 4         pic = df[img]
>       5         if df['label'].any() == 0:
>       6             im = Image.open(df[img])
> 
> C:\ProgramData\Anaconda3\envs\tensorflowenvironment\lib\site-packages\pandas\core\frame.py
> in __getitem__(self, key)    2925             if self.columns.nlevels
> > 1:    2926                 return self._getitem_multilevel(key)
> -> 2927             indexer = self.columns.get_loc(key)    2928             if is_integer(indexer):    2929                 indexer = [indexer]
> 
> C:\ProgramData\Anaconda3\envs\tensorflowenvironment\lib\site-packages\pandas\core\indexes\base.py
> in get_loc(self, key, method, tolerance)    2657                
> return self._engine.get_loc(key)    2658             except KeyError:
> -> 2659                 return self._engine.get_loc(self._maybe_cast_indexer(key))    2660        
> indexer = self.get_indexer([key], method=method, tolerance=tolerance) 
> 2661         if indexer.ndim > 1 or indexer.size > 1:
> 
> pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc()
> 
> pandas/_libs/index.pyx in pandas._libs.index.IndexEngine.get_loc()
> 
> pandas/_libs/hashtable_class_helper.pxi in
> pandas._libs.hashtable.PyObjectHashTable.get_item()
> 
> pandas/_libs/hashtable_class_helper.pxi in
> pandas._libs.hashtable.PyObjectHashTable.get_item()
> 
> KeyError:
> WindowsPath('N:/Users/Howell/Kaggle/X_Ray/chest_xray/train/NORMAL/IM-0580-0001.jpeg')

我刚刚发现了Pillow，所以不确定自己做错了什么。

现在，我将函数更改为以下函数，它可以正常运行，但不会执行任何操作……甚至不执行print语句。

def image_build(img, df):
    for img in df[img]:
        count = 1

        if df['label'].any() == 0:
            print('pass_image')
            pic = df[img]
            im = Image.open(pic)
            enh = ImageEnhance.Contrast(im)
            img = enh.enhance(1.9)
            img = im.rotate(90)
            img = im.transpose(Image.FLIP_LEFT_RIGHT)
            img = im.resize(224, 224)
            save_dir = 'N:/Users/Howell/Kaggle/X_Ray/chest_xray/train/NORMAL/'
            img.save(save_dir / 'new_image_'+count+'.jpeg')
            count += 1

在多人的帮助下，以下程序可以运行，但仅产生一张图片，并且卡在3上时卡住。

从PIL导入图像，ImageEnhance

def image_build(img, df):
    for index,row in df.iterrows():
        count = 1
        pic = row[img]
        if row['label'] == 0:
            im = Image.open(pic)
            enh = ImageEnhance.Contrast(im)
            im = enh.enhance(1.9)
            im = im.rotate(90)
            im = im.transpose(Image.FLIP_LEFT_RIGHT)
            im = im.resize((750, 500))
            save_dir = Path('N:/Users/Howell/Kaggle/X_Ray/chest_xray/train/NORMAL/')
            count2 = str(count)
            im.save(save_dir / str('new_image_'+count2+'.jpeg'))
            count += count + 1
            print(count)
        else:
            pass

Answer 1

您再次使用相同的变量img

spring:
  zipkin:
    base-url: http://zipkin-server
    discovery-client-enabled: true
    enabled: true
  sleuth.sampler.probability: 1.0

Answer 2

如果可行，请尝试以下方法：

def image_build(img, df):
    count = 1  #  define count here so that it do not get intialised for each iteration
    for img in df[img]:
        pic = df[img]
        if df['label'].any() == 0:
            im = Image.open('your_image_path')
            enh = ImageEnhance.Contrast(im)
            img = enh.enhance(1.9)
            img = im.rotate(90)
            img = im.transpose(Image.FLIP_LEFT_RIGHT)
            img = im.resize((224, 224))
            save_dir = 'your path'
            img.save(save_dir + 'new_image_'+'1'+'.jpeg')
            count += 1

Answer 3

好的。我终于明白了！将计数移到iterrows()

之前

已编辑

from PIL import Image, ImageEnhance

def image_build(img, df):
    count = 1
    for index,row in df.iterrows():
        pic = row[img]
        if row['label'] == 0:
            im = Image.open(pic)
            enh = ImageEnhance.Contrast(im)
            im = enh.enhance(1.9)
            im = im.rotate(90)
            im = im.transpose(Image.FLIP_LEFT_RIGHT)
            im = im.resize((750, 500))
            save_dir = Path('N:/Users/Howell/Kaggle/X_Ray/chest_xray/train/NORMAL/')
            count2 = str(count)
            im.save(save_dir + str('new_image_'+count2+'.jpeg'))
            count += count + 1
            print(count)
        else:
            pass

Answer 4

我认为这是文件路径的问题。用\（双反斜杠）或\

替换/

如何循环保存PIL图像

4 个答案: