I’m a bit of newbie at this, trying to rotate an image in Python Pillow without changing the position of the centre of the rotated image. OR by the pillow rotate looks of things… returning the centre back to it’s original spin location. In Pillow (Image.py) there is a function that rotates an image. This […]

- Tags -(nh - h) / 2.0, -cx) (1, -cx) # (0, -cy) # (0, -rotn_center[1] - post_trans[1], -tx) # (0, :py:attr:`PIL.Image.BILINEAR` (linear interpolation in a 2x2 environment), "w", ): """ Returns a rotated copy of this image. This method returns a copy of this image, ] def transform(x, 0, 0 1, 0.0, 0) else: post_trans = translate if center is None: # FIXME These should be rounded to ints?, 0]).astype(np.uint8), 1, 1 0, 1) # In any case, 1) # The reverse matrix is thus: # (1, 15, 50, 90, AFFINE, and returns the image centre to the place it was originally rotated at. I was wondering how this could be achieved with the least code repet, angle, as long as we're not # translating or changing the center. if not (center or translate): if angle == 0:, B, baboon.size) print("colour_clip size", c--, cameraman.size) rot_trans_col_clip = colour_clip.add_mask().rotate(20) rot_trans_baboon = cameraman.add_mask().rotate(20) stacked_clips = mp, center=None, color=np.array([250, colour_clip.size) print("cameraman size", cos a, cx) ( cos a, cy) * (-sin a, d, d * x + e * y + f matrix[2], duration=3) # important to use .astype(np.uint8) cameraman = mped.ImageClip("cameraman.jpg", duration=3) colour_clip = mped.ColorClip(size=[500, duration=3) print("baboon_size", duration=3) rotated_image = image_clip.rotate(20).set_position((pillow_rotate_x. (-matrix[2]), e, expand=0, expands the output image to make it large enough to hold the entire rotated image. If false or omitted, f) = matrix return a * x + b * y + c, fillcolor=fillcolor) This function also applies some translation (position shift) in order to keep the rotated images corners inside the ima, fillcolor=None, fps=5) With the above code you can layer up some different types of content and rotate them. The two input image files of the baboon and ca, H, h / 2.0) else: rotn_center = center angle = -math.radians(angle) matrix = [ round(math.cos(a, h = nw, h = self.size if translate is None: post_trans = (0, H.x, how to restore the rotation centre locations ?, I'm a bit of newbie at this, is so that if you pass an angle to pillow rotate the outcome is deterministic, it is set to :py:attr:`PIL.Image.NEAREST`. See :ref:`concept-filters`. :param expand: Optional expansion flag. If true, make the output image the same size as the input image. Note that the expand flag assumes rotation around the center a, matrix ) matrix[2] += rotn_center[0] matrix[5] += rotn_center[1] if expand: # calculate output s, matrix) the affect it has on the images is illustrated here:- https://drive.google.com/file/d/1d_prYqb-fqizFcV0MD0rMXOIny2L0KW5/view?usp=sh, matrix) w, matrix) what I would like to do is extract the values of matrix[2] and matrix[5] so that I can reverse this translation, matrix) xx.append(x) yy.append(y) nw = math.ceil(max(xx)) - math.floor(min(xx)) nh =, matrix); }, matrix): (a, matrix[5] = transform( -rotn_center[0] - post_trans[0], matrix[5] = transform(-(nw - w) / 2.0, nh return self.transform((w, or :py:attr:`PIL.Image.BICUBIC` (cubic spline interpolation in a 4x4 environment). If omitted, or if the image has mode "1" or "P", Pillow rotate applies a translation at the end. The reason that this would be useful, pillow_rotate_y.(-matrix[5])) So that it undoes the pillow translation, rather than also incorporating a translation that is dependent on the size of the images. So my question is, resample, resample=NEAREST, rot_trans_baboon]) stacked_clips.write_videofile('rotated_imagery_on_baboon.mp4', rot_trans_col_clip, rotated the given number of degrees counter clockwise around its centre. :param angle: In degrees counter clockwise., round(-math.sin(angle), round(math.cos(angle), round(math.sin(angle), sin a, so that their corners are still in view (not cropped). Without the Pillow Translation code inside the pillow rotation function it looks like, sys.version) baboon = mped.ImageClip("baboon.png", the centres of the images have not moved. This is the outcome that I want. However, the final translation may be updated at the end to # compensate for the expand flag. w, this is the same as taking the image of the # translation vector as new translation vector. matrix[2], translate=None, trying to rotate an image in Python Pillow without changing the position of the centre of the rotated image. OR by the pillow rotate looks of, tx) (1, ty) * (0, when the rotation is called in moviepy. To achieve something like this... import moviepy.editor as mped image_clip = mped.ImageClip("image., y, y = transform(x, y) \in [0