Python - Resize Images with PIL

giuamato — Mon, 27 Apr 2009 13:49:00 +0200

Here is a function, which can be called somewhere to resize images. It works resizing the image to user defined width and height, or setting width (or height) to -1, resize the new dimensions maintaining the same aspect ratio.

It is possible to set even the quality of the image.

def Resize(file,width,height,quality=80):

path,ext=os.path.splitext(file)

name=os.path.basename(path)

try:

image=Image.open(file)

except:

print "Error! -> file:",name+ext

return

w,h=image.size

if width==-1 and height!=-1:

w=height*w/h

h=height

if height==-1 and width!=-1:

h=width*h/w

w=width

if width!=-1 and height!=-1:

w=width

h=height

fmt=image.format

try:

image=image.resize((w,h),Image.ANTIALIAS).save(file,fmt,quality=quality)

except:

print "Error! -> file:",name+ext

return

print name+ext,"...Ok!"

A more complex code is here, it’s a script that use wx as a graphical user interface.

Python Examples

Python - Resize Images with PIL