pillow模块批量读取图像、旋转、放缩、裁剪图片等操作

pillow 模块是一个图像处理模块

1、pillow的安装和导入

1. pillow 模块的安装

pip install pillow
或
pip install -i https://pypi.tuna.tsinghua.edu.cn/simple pilllow # 可以提高下载速度


2. pillow模块的导入

注意&＃xff1a;

pillow模块导入的时候&＃xff0c;并不是直接导入模块的名字
导入&＃xff1a; from PIL import Image

2、pillow 读取、放缩、旋转、左右翻转、上下翻转图片操作

# -*- coding: UTF-8 -*-from PIL import Image# 1、读取图像
im &＃61; Image.open(&＃39;images/2019-01-04 001456.jpg&＃39;)# 2、显示图片
im.show()# 3、放缩图片&＃xff1a; 原图像缩放为128x128
im_resized &＃61; im.resize((128, 128))
im_resized.show()# print(dir(im))
&＃39;&＃39;&＃39;
[&＃39;_Image__transformer&＃39;, &＃39;__array_interface__&＃39;, &＃39;__class__&＃39;, &＃39;__copy__&＃39;, &＃39;__del__&＃39;, &＃39;__delattr__&＃39;, &＃39;__dict__&＃39;, &＃39;__dir__&＃39;, &＃39;__doc__&＃39;, &＃39;__enter__&＃39;, &＃39;__eq__&＃39;, &＃39;__exit__&＃39;, &＃39;__format__&＃39;, &＃39;__ge__&＃39;,&＃39;__getattribute__&＃39;, &＃39;__getstate__&＃39;, &＃39;__gt__&＃39;, &＃39;__hash__&＃39;, &＃39;__init__&＃39;, &＃39;__init_subclass__&＃39;,&＃39;__le__&＃39;, &＃39;__lt__&＃39;, &＃39;__module__&＃39;, &＃39;__ne__&＃39;, &＃39;__new__&＃39;, &＃39;__reduce__&＃39;, &＃39;__reduce_ex__&＃39;, &＃39;__repr__&＃39;, &＃39;__setattr__&＃39;, &＃39;__setstate__&＃39;, &＃39;__sizeof__&＃39;, &＃39;__str__&＃39;, &＃39;__subclasshook__&＃39;, &＃39;__weakref__&＃39;,&＃39;_close_exclusive_fp_after_loading&＃39;, &＃39;_copy&＃39;, &＃39;_crop&＃39;, &＃39;_dump&＃39;, &＃39;_ensure_mutable&＃39;, &＃39;_exclusive_fp&＃39;,&＃39;_expand&＃39;, &＃39;_getexif&＃39;, &＃39;_getmp&＃39;, &＃39;_min_frame&＃39;, &＃39;_new&＃39;, &＃39;_open&＃39;, &＃39;_repr_png_&＃39;, &＃39;_seek_check&＃39;,&＃39;alpha_composite&＃39;, &＃39;app&＃39;, &＃39;applist&＃39;, &＃39;bits&＃39;, &＃39;category&＃39;, &＃39;close&＃39;, &＃39;convert&＃39;, &＃39;copy&＃39;, &＃39;crop&＃39;, &＃39;decoderconfig&＃39;, &＃39;decodermaxblock&＃39;, &＃39;draft&＃39;, &＃39;effect_spread&＃39;, &＃39;filename&＃39;, &＃39;filter&＃39;, &＃39;format&＃39;, &＃39;format_description&＃39;, &＃39;fp&＃39;, &＃39;frombytes&＃39;, &＃39;fromstring&＃39;, &＃39;get_format_mimetype&＃39;, &＃39;getbands&＃39;, &＃39;getbbox&＃39;,&＃39;getchannel&＃39;, &＃39;getcolors&＃39;, &＃39;getdata&＃39;, &＃39;getextrema&＃39;, &＃39;getim&＃39;, &＃39;getpalette&＃39;, &＃39;getpixel&＃39;, &＃39;getprojection&＃39;, &＃39;height&＃39;, &＃39;histogram&＃39;, &＃39;huffman_ac&＃39;, &＃39;huffman_dc&＃39;, &＃39;icclist&＃39;, &＃39;im&＃39;, &＃39;info&＃39;, &＃39;layer&＃39;, &＃39;layers&＃39;, &＃39;load&＃39;,&＃39;load_djpeg&＃39;, &＃39;load_end&＃39;, &＃39;load_prepare&＃39;, &＃39;load_read&＃39;, &＃39;mode&＃39;, &＃39;offset&＃39;, &＃39;palette&＃39;, &＃39;paste&＃39;, &＃39;point&＃39;,&＃39;putalpha&＃39;, &＃39;putdata&＃39;, &＃39;putpalette&＃39;, &＃39;putpixel&＃39;, &＃39;pyaccess&＃39;, &＃39;quantization&＃39;, &＃39;quantize&＃39;, &＃39;readonly&＃39;, &＃39;remap_palette&＃39;, &＃39;resize&＃39;, &＃39;rotate&＃39;, &＃39;save&＃39;, &＃39;seek&＃39;, &＃39;show&＃39;, &＃39;size&＃39;, &＃39;split&＃39;, &＃39;tell&＃39;, &＃39;thumbnail&＃39;, # 对图像的一些操作方法&＃39;tile&＃39;, &＃39;tobitmap&＃39;, &＃39;tobytes&＃39;, &＃39;toqimage&＃39;, &＃39;toqpixmap&＃39;, &＃39;tostring&＃39;, &＃39;transform&＃39;, &＃39;transpose&＃39;, &＃39;verify&＃39;, &＃39;width&＃39;]
&＃39;&＃39;&＃39;# 4、旋转图片&＃xff1a; 指定旋转的角度
img_rotate &＃61; im.rotate(45) # 旋转之后的图片的大小并不会发生变化&＃xff0c;旋转的留白区域会用黑色填充
img_rotate.show()# 5、翻转图片&＃xff1a;图像的翻转用 transpose()函数&＃xff0c;直接在入参中指定变换方式即可&＃xff0c;不仅支持上下、左右翻转&＃xff1b;也支持逆时针90、180、270等角度的旋转&＃xff0c;效果与rotate()相同。示例如下&＃xff1a;out_lr &＃61; im.transpose(Image.FLIP_LEFT_RIGHT) # 左右翻转
out_lr.show()
out_tb &＃61; im.transpose(Image.FLIP_TOP_BOTTOM) # 上下翻转
out_tb.show()
# out &＃61; img.transpose(Image.ROTATE_90) # 逆时针旋转九十度
# out &＃61; img.transpose(Image.ROTATE_180)
# out &＃61; img.transpose(Image.ROTATE_270)
# out.show()


3、pillow批量操作图片

没有什么好说的&＃xff0c;就是对上面的操作从图片改成图片集&＃xff0c;然后加入循环即可。

__Author__ &＃61; &＃39;Shliang&＃39;# 批量旋转图片import os
from PIL import Imagedef rotate_imgs(input_imgs_dir, output_imgs_dir):images &＃61; os.listdir(input_imgs_dir)print(images)for i, img in enumerate(images):# print(type(i))print(&＃39;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃39;, img, &＃39;&＃61;&＃61;&＃61;&＃61;&＃61;&＃61;&＃39;)img_src &＃61; Image.open(input_imgs_dir &＃43; "/" &＃43; img) # 忘记加了前面的文件夹的名字&＃xff0c;所以提示找不到这个文件# img_src.show()singles &＃61; [15, 30, 45, 315, 330, 345] # 旋转不同的角度for num, s in enumerate(singles):img_rotate &＃61; img_src.rotate(s) # 其他的操作只要更改一下这里的函数就可以 s: 角度img_rotate.save(output_imgs_dir &＃43; "/" &＃43; &＃39;_&＃39; &＃43; str(num) &＃43; &＃39;_&＃39; &＃43; img)# img_rotate2 &＃61; img_src.rotate(30)# img_rotate2.save(output_imgs_dir &＃43; "/" &＃43; str((i)) &＃43; img)if __name__ &＃61;&＃61; "__main__":input_imgs_dir &＃61; "aligned_dlib160"output_imgs_dir &＃61; "rotate_images"if not os.path.exists(output_imgs_dir):os.mkdir(output_imgs_dir)rotate_imgs(input_imgs_dir, output_imgs_dir)

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