def __init__(self, img):
''' initialize the image alias using an image (required)'''
self.image = Image(img)
self.drawing = twombly.draw(self.image)
# originals
self.ref_image = Image(img.copy())
self.ref_drawing = twombly.draw(self.ref_image)
self.history = []
self.undone = []
self.tmp_history = []
self.tmp_undone = []
def to_drawing(im, distance=20, canny_sigma=None, canny_low=None, canny_high=None, fully_connected='high', contours=None, level=0, line=True):
'''find image contours and draws them using a twombly Drawing'''
if contours is None:
contours = _get_contours(im, level, canny_sigma, canny_low, canny_high, fully_connected)
tmp = zeros(im.shape, dtype=im.dtype)
ctx = draw(tmp)
for a in contours:
ctx.move_to(a[0][1], a[0][0])
if line:
a = a[:len(a)/2:distance]
for b in a:
ctx.line_to(b[1], b[0])
return tmp, ctx