def extractimg(im, poly):
path= PIL.ImagePath.Path(poly)
bb= path.getbbox()
bbsize= (abs(bb[2]-bb[0]), abs(bb[3]-bb[1]))
tx= PIL.ImageTransform.ExtentTransform(path.getbbox())
newimg= im.transform(bbsize, tx)
# update path to match 'newimg'
path.map(lambda x,y:(x-bb[0], y-bb[1]))
# now clear pixels outside poly
img= PIL.Image.new("RGBA", bbsize)
img.paste(newimg, createmask(path))
return img
def extractimg(im, poly):
path = PIL.ImagePath.Path(poly)
bb = path.getbbox()
bbsize = (abs(bb[2] - bb[0]), abs(bb[3] - bb[1]))
tx = PIL.ImageTransform.ExtentTransform(path.getbbox())
newimg = im.transform(bbsize, tx)
# update path to match 'newimg'
path.map(lambda x, y: (x - bb[0], y - bb[1]))
# now clear pixels outside poly
img = PIL.Image.new("RGBA", bbsize)
img.paste(newimg, createmask(path))
return img
def createmask(path):
bb= path.getbbox()
bbsize= (abs(bb[2]-bb[0]), abs(bb[3]-bb[1]))
img= PIL.Image.new("1", bbsize)
draw= PIL.ImageDraw.Draw(img)
draw.polygon(path, fill=1)
return img
def createmask(path):
bb = path.getbbox()
bbsize = (abs(bb[2] - bb[0]), abs(bb[3] - bb[1]))
img = PIL.Image.new("1", bbsize)
draw = PIL.ImageDraw.Draw(img)
draw.polygon(path, fill=1)
return img
