def perturb_frame(frame,params):
dims = frame.image.get_hw()
rand_affine = RandomPerturber.generate_random_affine(old_div(dims,2),dims,params)
perturbed_frame = Frame(frame.image_path)
perturbed_frame.image = rand_affine.apply_to_image(frame.image,dims)
if frame.calib_mat is not None:
perturbed_frame.calib_mat = rand_affine.apply_to_matrix(frame.calib_mat)
for i,obj in enumerate(frame.objects):
# filter out completely out of bound objects
perturbed_obj_box = rand_affine.apply_to_box(obj.box)
perturbed_polygons = rand_affine.apply_to_polygons(obj.polygons)
if Box.intersection(perturbed_obj_box,perturbed_frame.image.get_bounding_box()) is not None:
obj_copy = copy.deepcopy(obj)
obj_copy.box = perturbed_obj_box
obj_copy.polygons = perturbed_polygons
perturbed_frame.objects.append(obj_copy)
return perturbed_frame
def apply_affine_to_frame(frame, affine, output_size):
perturbed_frame = Frame(frame.image_path)
perturbed_frame.image = affine.apply_to_image(frame.image, output_size)
if frame.calib_mat is not None:
perturbed_frame.calib_mat = affine.apply_to_matrix(frame.calib_mat)
for i, obj in enumerate(frame.objects):
# filter out completely out of bound objects
perturbed_obj_box = affine.apply_to_box(obj.box)
perturbed_polygons = affine.apply_to_polygons(obj.polygons)
if Box.intersection(
perturbed_obj_box,
perturbed_frame.image.get_bounding_box()) is not None:
obj_copy = copy.deepcopy(obj)
obj_copy.box = perturbed_obj_box
obj_copy.polygons = perturbed_polygons
perturbed_frame.objects.append(obj_copy)
return perturbed_frame