解决方法:
这个貌似是属于一个bug
把Image.py中的1500行左右的split函数改成如下即可:
def split(self):
"Split image into bands"
self.load()
if self.im.bands == 1:
ims = [self.copy()]
else:
ims = []
#self.load()
for i in range(self.im.bands):
ims.append(self._new(self.im.getband(i)))
return tuple(ims)