枕头适用于jpeg和大多数图像文件类型，但不适用于PNG。
我确实运行过sudo apt-get install zlib1g-dev，但这似乎无法解决问题。任何帮助将不胜感激
错误：
03-14 01:55:24.934 21254 25588 I python : File "/home/kivy/Desktop/PicApp/.buildozer/android/app/main.py", line 4088, in photo_effect
03-14 01:55:24.934 21254 25588 I python : File "/home/kivy/Desktop/PicApp/.buildozer/android/platform/build/build/python-installs/picapp/PIL/ImageEnhance.py", line 54, in __init__
03-14 01:55:24.934 21254 25588 I python : File "/home/kivy/Desktop/PicApp/.buildozer/android/platform/build/build/python-installs/picapp/PIL/Image.py", line 892, in convert
03-14 01:55:24.934 21254 25588 I python : File "/home/kivy/Desktop/PicApp/.buildozer/android/platform/build/build/python-installs/picapp/PIL/ImageFile.py", line 210, in load
03-14 01:55:24.934 21254 25588 I python : IOError: [Errno 22] Invalid argument