def test_random_vertical_valid_prob_py():
"""
Test RandomVerticalFlip op with py_transforms: valid non-default input, expect to pass
"""
logger.info("test_random_vertical_valid_prob_py")
original_seed = config_get_set_seed(0)
original_num_parallel_workers = config_get_set_num_parallel_workers(1)
# Generate dataset
data = ds.TFRecordDataset(DATA_DIR,
SCHEMA_DIR,
columns_list=["image"],
shuffle=False)
transforms = [
py_vision.Decode(),
py_vision.RandomVerticalFlip(0.8),
py_vision.ToTensor()
]
transform = py_vision.ComposeOp(transforms)
data = data.map(input_columns=["image"], operations=transform())
filename = "random_vertical_01_py_result.npz"
save_and_check_md5(data, filename, generate_golden=GENERATE_GOLDEN)
# Restore config setting
ds.config.set_seed(original_seed)
ds.config.set_num_parallel_workers(original_num_parallel_workers)
def test_random_vertical_comp(plot=False):
"""
Test test_random_vertical_flip and compare between python and c image augmentation ops
"""
logger.info("test_random_vertical_comp")
# First dataset
data1 = ds.TFRecordDataset(DATA_DIR,
SCHEMA_DIR,
columns_list=["image"],
shuffle=False)
decode_op = c_vision.Decode()
# Note: The image must be flipped if prob is set to be 1
random_horizontal_op = c_vision.RandomVerticalFlip(1)
data1 = data1.map(input_columns=["image"], operations=decode_op)
data1 = data1.map(input_columns=["image"], operations=random_horizontal_op)
# Second dataset
data2 = ds.TFRecordDataset(DATA_DIR,
SCHEMA_DIR,
columns_list=["image"],
shuffle=False)
transforms = [
py_vision.Decode(),
# Note: The image must be flipped if prob is set to be 1
py_vision.RandomVerticalFlip(1),
py_vision.ToTensor()
]
transform = py_vision.ComposeOp(transforms)
data2 = data2.map(input_columns=["image"], operations=transform())
images_list_c = []
images_list_py = []
for item1, item2 in zip(data1.create_dict_iterator(),
data2.create_dict_iterator()):
image_c = item1["image"]
image_py = (item2["image"].transpose(1, 2, 0) * 255).astype(np.uint8)
images_list_c.append(image_c)
images_list_py.append(image_py)
# Check if the output images are the same
mse = diff_mse(image_c, image_py)
assert mse < 0.001
if plot:
visualize_list(images_list_c, images_list_py, visualize_mode=2)
def test_random_vertical_invalid_prob_py():
"""
Test RandomVerticalFlip op in py_transforms: invalid input, expect to raise error
"""
logger.info("test_random_vertical_invalid_prob_py")
# Generate dataset
data = ds.TFRecordDataset(DATA_DIR, SCHEMA_DIR, columns_list=["image"], shuffle=False)
try:
transforms = [
py_vision.Decode(),
# Note: Valid range of prob should be [0.0, 1.0]
py_vision.RandomVerticalFlip(1.5),
py_vision.ToTensor()
]
transform = py_vision.ComposeOp(transforms)
data = data.map(input_columns=["image"], operations=transform())
except ValueError as e:
logger.info("Got an exception in DE: {}".format(str(e)))
assert 'Input prob is not within the required interval of (0.0 to 1.0).' in str(e)