def update_onnx_initializer(onnx_file, ckpt_file, output_file):
"Update onnx initializer."
with open(onnx_file, 'rb') as f:
data = f.read()
model = onnx_pb.ModelProto()
model.ParseFromString(data)
initializer = model.graph.initializer
param_dict = load_checkpoint(ckpt_file)
for i, _ in enumerate(initializer):
item = initializer[i]
if not item.name in param_dict:
print(
f"Warning: Can not find '{item.name}' in checkpoint parameters dictionary"
)
continue
weight = param_dict[item.name].data.asnumpy()
bin_data = weight.tobytes()
if len(item.raw_data) != len(bin_data):
print(
f"Warning: Size of weight from checkpoint is different from original size, ignore it"
)
continue
item.raw_data = bin_data
pb_msg = model.SerializeToString()
with open(output_file, 'wb') as f:
f.write(pb_msg)
print(f'Graph name: {model.graph.name}')
print(f'Initializer length: {len(initializer)}')
print(f'Checkpoint dict length: {len(param_dict)}')
print(
f'The new weights have been written to file {output_file} successfully'
)
def clone_model_with_shape_infer(model):
if model_has_infer_metadata(model):
cloned_model = onnx_proto.ModelProto()
cloned_model.CopyFrom(model)
else:
cloned_model = save_and_reload_model(model)
return cloned_model
def main():
if len(sys.argv) < 3:
print(
'Usage: python onnx_to_nnir.py <onnxModel> <nnirOutputFolder> [--input_dims n,c,h,w (optional)] [--node_type_append 0/1 (optional: appends node type to output tensor name)]'
)
sys.exit(1)
onnxFileName = sys.argv[1]
outputFolder = sys.argv[2]
#appends node type to output tensor name.
node_type_append = 0
pos = 4
while pos < len(sys.argv) and len(
sys.argv) > 3 and sys.argv[pos][:2] == '--':
if sys.argv[pos] == '--node_type_append':
node_type_append = int(sys.argv[pos + 1])
pos = pos + 2
elif sys.argv[pos] == '--input_dims':
#input_dims = sys.argv[pos+1]
pos = pos + 2
print('loading ONNX model from %s ...' % (onnxFileName))
onnx_model_proto = onnx_pb.ModelProto()
if not os.path.isfile(onnxFileName):
print('ERROR: unable to open: ' + onnxFileName)
sys.exit(1)
onnx_model_proto.ParseFromString(open(onnxFileName, 'rb').read())
print('converting to IR model in %s ...' % (outputFolder))
onnx2ir(onnx_model_proto, outputFolder, node_type_append)
def main(args):
device_name = 'cpu' if args.gpu is None else 'cuda:' + str(args.gpu)
device = torch.device(device_name)
n_joints = 14
model = LPM(3, 32, n_joints + 1, device, T=args.t)
if args.checkpoint_name is not None:
print('Loading checkpoint...')
path = os.path.join(args.model_dir, args.checkpoint_name)
checkpoint = torch.load(path)
model.load_state_dict(checkpoint['state_dict'])
model = model.to(device)
print('Exporting ONNX...')
dummy_images = torch.zeros(
(3, args.resolution, args.resolution)).to(device)
dummy_centers = torch.zeros(
(1, args.resolution, args.resolution)).to(device)
torch.onnx.export(model, (dummy_images, dummy_images, dummy_images,
dummy_images, dummy_images, dummy_centers),
args.onnx_name)
print('Exporting CoreML...')
model_file = open(args.onnx_name, 'rb')
model_proto = onnx_pb.ModelProto()
model_proto.ParseFromString(model_file.read())
mlmodel = onnx_coreml.convert(model_proto,
mode='regressor',
image_input_names=['0'])
mlmodel.save(args.core_ml_name)
print('Done!')
def augment_graph(self):
'''
Adds ReduceMin and ReduceMax nodes to all quantization_candidates op type nodes in
model and ensures their outputs are stored as part of the graph output
:return: augmented ONNX model
'''
model = onnx_proto.ModelProto()
model.CopyFrom(self.model)
model = onnx.shape_inference.infer_shapes(model)
added_nodes = []
added_outputs = []
tensors, value_infos = self.select_tensors_to_calibrate(model)
for tensor in tensors:
# When doing ReduceMax/ReduceMin, ORT can't reduce on dim with value of 0 if 'keepdims' is false.
# To make the code simple, we always let keepdims to be 1.
keepdims = 1
# dim could be:
# [dim_param: "batch_size", dim_value: 256, dim_value: 36, dim_value: 64],
# [dim_value: 0],
# ...
# Please see the definition of TensorShapeProto https://github.com/onnx/onnx/blob/master/onnx/onnx.proto#L651
dim = value_infos[tensor].type.tensor_type.shape.dim
shape = (1, ) if len(dim) == 1 else tuple(1
for i in range(len(dim)))
# Adding ReduceMin nodes
reduce_min_name = tensor + '_ReduceMin'
reduce_min_node = onnx.helper.make_node('ReduceMin', [tensor],
[tensor + '_ReduceMin'],
reduce_min_name,
keepdims=keepdims)
added_nodes.append(reduce_min_node)
added_outputs.append(
helper.make_tensor_value_info(reduce_min_node.output[0],
TensorProto.FLOAT, shape))
# Adding ReduceMax nodes
reduce_max_name = tensor + '_ReduceMax'
reduce_max_node = onnx.helper.make_node('ReduceMax', [tensor],
[tensor + '_ReduceMax'],
reduce_max_name,
keepdims=keepdims)
added_nodes.append(reduce_max_node)
added_outputs.append(
helper.make_tensor_value_info(reduce_max_node.output[0],
TensorProto.FLOAT, shape))
model.graph.node.extend(added_nodes)
model.graph.output.extend(added_outputs)
onnx.save(model,
self.augmented_model_path,
save_as_external_data=self.use_external_data_format)
self.augment_model = model
def augment_graph(self):
'''
Adds ReduceMin and ReduceMax nodes to all quantization_candidates op type nodes in
model and ensures their outputs are stored as part of the graph output
:return: augmented ONNX model
'''
model = onnx_proto.ModelProto()
model.CopyFrom(self.model)
model = onnx.shape_inference.infer_shapes(model)
value_infos = {vi.name: vi for vi in model.graph.value_info}
value_infos.update({ot.name: ot for ot in model.graph.output})
value_infos.update({it.name: it for it in model.graph.input})
initializer = set(init.name for init in model.graph.initializer)
added_nodes = []
added_outputs = []
tensors_to_calibrate = set()
tensor_type_to_calibrate = set([TensorProto.FLOAT, TensorProto.FLOAT16])
for node in model.graph.node:
should_be_calibrate = ((node.op_type in self.calibrate_op_types) and
(node.name not in self.black_nodes)) or (node.name in self.white_nodes) or ((not self.calibrate_op_types) and (node.name not in self.black_nodes))
if should_be_calibrate:
for tensor_name in itertools.chain(node.input, node.output):
if tensor_name in value_infos.keys():
vi = value_infos[tensor_name]
if vi.type.HasField('tensor_type') and (vi.type.tensor_type.elem_type in tensor_type_to_calibrate) and (tensor_name not in initializer):
tensors_to_calibrate.add(tensor_name)
# If augmenting all ops, it's possible that some nodes' input value are 0.
# Can't reduce on dim with value of 0 if 'keepdims' is false, therefore set keepdims to 1.
if self.calibrate_op_types:
keepdims_value = 0
else:
keepdims_value = 1
for tensor in tensors_to_calibrate:
# Adding ReduceMin nodes
reduce_min_name = tensor + '_ReduceMin'
reduce_min_node = onnx.helper.make_node('ReduceMin', [tensor], [tensor + '_ReduceMin'],
reduce_min_name,
keepdims=keepdims_value)
added_nodes.append(reduce_min_node)
added_outputs.append(helper.make_tensor_value_info(reduce_min_node.output[0], TensorProto.FLOAT, ()))
# Adding ReduceMax nodes
reduce_max_name = tensor + '_ReduceMax'
reduce_max_node = onnx.helper.make_node('ReduceMax', [tensor], [tensor + '_ReduceMax'],
reduce_max_name,
keepdims=keepdims_value)
added_nodes.append(reduce_max_node)
added_outputs.append(helper.make_tensor_value_info(reduce_max_node.output[0], TensorProto.FLOAT, ()))
model.graph.node.extend(added_nodes)
model.graph.output.extend(added_outputs)
return model
def augment_graph(self):
'''
Adds ReduceMin and ReduceMax nodes to all quantization_candidates op type nodes in
model and ensures their outputs are stored as part of the graph output
:return: augmented ONNX model
'''
model = onnx_proto.ModelProto()
model.CopyFrom(self.model)
model = onnx.shape_inference.infer_shapes(model)
value_infos = {vi.name: vi for vi in model.graph.value_info}
value_infos.update({ot.name: ot for ot in model.graph.output})
value_infos.update({it.name: it for it in model.graph.input})
initializer = set(init.name for init in model.graph.initializer)
added_nodes = []
added_outputs = []
tensors_to_calibrate = set()
tensor_type_to_calibrate = set([TensorProto.FLOAT, TensorProto.FLOAT16])
for node in model.graph.node:
if len(self.op_types_to_calibrate) == 0 or node.op_type in self.op_types_to_calibrate:
for tensor_name in itertools.chain(node.input, node.output):
if tensor_name in value_infos.keys():
vi = value_infos[tensor_name]
if vi.type.HasField('tensor_type') and (
vi.type.tensor_type.elem_type in tensor_type_to_calibrate) and (
tensor_name not in initializer):
tensors_to_calibrate.add(tensor_name)
for tensor in tensors_to_calibrate:
# Adding ReduceMin nodes
reduce_min_name = tensor + '_ReduceMin'
reduce_min_node = onnx.helper.make_node('ReduceMin', [tensor], [tensor + '_ReduceMin'],
reduce_min_name,
keepdims=0)
added_nodes.append(reduce_min_node)
added_outputs.append(helper.make_tensor_value_info(reduce_min_node.output[0], TensorProto.FLOAT, ()))
# Adding ReduceMax nodes
reduce_max_name = tensor + '_ReduceMax'
reduce_max_node = onnx.helper.make_node('ReduceMax', [tensor], [tensor + '_ReduceMax'],
reduce_max_name,
keepdims=0)
added_nodes.append(reduce_max_node)
added_outputs.append(helper.make_tensor_value_info(reduce_max_node.output[0], TensorProto.FLOAT, ()))
model.graph.node.extend(added_nodes)
model.graph.output.extend(added_outputs)
onnx.save(model, self.augmented_model_path)
self.augment_model = model
def main():
if len(sys.argv) < 3:
print('Usage: python onnx_to_nnir.py <onnxModel> <nnirOutputFolder> [--input_dims n,c,h,w (optional)]')
sys.exit(1)
onnxFileName = sys.argv[1]
outputFolder = sys.argv[2]
print('loading ONNX model from %s ...' % (onnxFileName))
onnx_model_proto = onnx_pb.ModelProto()
if not os.path.isfile(onnxFileName):
print('ERROR: unable to open: ' + onnxFileName)
sys.exit(1)
onnx_model_proto.ParseFromString(open(onnxFileName, 'rb').read())
print('converting to IR model in %s ...' % (outputFolder))
onnx2ir(onnx_model_proto, outputFolder)
def augment_graph(self):
'''
Adds ReduceMin and ReduceMax nodes to all quantization_candidates op type nodes in
model and ensures their outputs are stored as part of the graph output
:return: augmented ONNX model
'''
model = onnx_proto.ModelProto()
model.CopyFrom(self.model)
model = onnx.shape_inference.infer_shapes(model)
added_nodes = []
added_outputs = []
tensors, value_infos = self.select_tensors_to_calibrate(model)
for tensor in tensors:
# Get tensor's shape
dim = len(value_infos[tensor].type.tensor_type.shape.dim)
shape = (1, ) if dim == 1 else list(1 for i in range(dim))
# Adding ReduceMin nodes
reduce_min_name = tensor + '_ReduceMin'
reduce_min_node = onnx.helper.make_node('ReduceMin', [tensor],
[tensor + '_ReduceMin'],
reduce_min_name)
added_nodes.append(reduce_min_node)
added_outputs.append(
helper.make_tensor_value_info(reduce_min_node.output[0],
TensorProto.FLOAT, shape))
# Adding ReduceMax nodes
reduce_max_name = tensor + '_ReduceMax'
reduce_max_node = onnx.helper.make_node('ReduceMax', [tensor],
[tensor + '_ReduceMax'],
reduce_max_name)
added_nodes.append(reduce_max_node)
added_outputs.append(
helper.make_tensor_value_info(reduce_max_node.output[0],
TensorProto.FLOAT, shape))
model.graph.node.extend(added_nodes)
model.graph.output.extend(added_outputs)
onnx.save(model, self.augmented_model_path)
self.augment_model = model
def augment_graph(self):
'''
make all quantization_candidates op type nodes as part of the graph output.
:return: augmented ONNX model
'''
model = onnx_proto.ModelProto()
model.CopyFrom(self.model)
model = onnx.shape_inference.infer_shapes(model)
added_nodes = []
added_outputs = []
tensors, value_infos = self.select_tensors_to_calibrate(model)
for tensor in tensors:
added_outputs.append(value_infos[tensor])
model.graph.node.extend(added_nodes)
model.graph.output.extend(added_outputs)
onnx.save(model, self.augmented_model_path)
self.augment_model = model
def main():
os.system('rm -rf saved_models && mkdir saved_models')
files = glob.glob('saved_models/*.onnx') + glob.glob(
'../yolov3/weights/*.onnx')
for f in files:
# 1. ONNX to CoreML
name = 'saved_models/' + f.split('/')[-1].replace('.onnx', '')
model_file = open(f, 'rb')
model_proto = onnx_pb.ModelProto()
model_proto.ParseFromString(model_file.read())
coreml_model = convert(model_proto, image_input_names=['0'])
# coreml_model.save(model_out)
# 2. Reduce model to FP16, change outputs to DOUBLE and save
import coremltools
spec = coreml_model.get_spec()
for i in range(2):
spec.description.output[i].type.multiArrayType.dataType = \
coremltools.proto.FeatureTypes_pb2.ArrayFeatureType.ArrayDataType.Value('DOUBLE')
spec = coremltools.utils.convert_neural_network_spec_weights_to_fp16(
spec)
coreml_model = coremltools.models.MLModel(spec)
num_classes = 80
num_anchors = 507
spec.description.output[0].type.multiArrayType.shape.append(
num_classes)
spec.description.output[0].type.multiArrayType.shape.append(
num_anchors)
spec.description.output[1].type.multiArrayType.shape.append(4)
spec.description.output[1].type.multiArrayType.shape.append(
num_anchors)
coreml_model.save(name + '.mlmodel')
print(spec.description)
# 3. Create NMS protobuf
import numpy as np
nms_spec = coremltools.proto.Model_pb2.Model()
nms_spec.specificationVersion = 3
for i in range(2):
decoder_output = coreml_model._spec.description.output[
i].SerializeToString()
nms_spec.description.input.add()
nms_spec.description.input[i].ParseFromString(decoder_output)
nms_spec.description.output.add()
nms_spec.description.output[i].ParseFromString(decoder_output)
nms_spec.description.output[0].name = 'confidence'
nms_spec.description.output[1].name = 'coordinates'
output_sizes = [num_classes, 4]
for i in range(2):
ma_type = nms_spec.description.output[i].type.multiArrayType
ma_type.shapeRange.sizeRanges.add()
ma_type.shapeRange.sizeRanges[0].lowerBound = 0
ma_type.shapeRange.sizeRanges[0].upperBound = -1
ma_type.shapeRange.sizeRanges.add()
ma_type.shapeRange.sizeRanges[1].lowerBound = output_sizes[i]
ma_type.shapeRange.sizeRanges[1].upperBound = output_sizes[i]
del ma_type.shape[:]
nms = nms_spec.nonMaximumSuppression
nms.confidenceInputFeatureName = '133' # 1x507x80
nms.coordinatesInputFeatureName = '134' # 1x507x4
nms.confidenceOutputFeatureName = 'confidence'
nms.coordinatesOutputFeatureName = 'coordinates'
nms.iouThresholdInputFeatureName = 'iouThreshold'
nms.confidenceThresholdInputFeatureName = 'confidenceThreshold'
nms.iouThreshold = 0.6
nms.confidenceThreshold = 0.4
nms.pickTop.perClass = True
labels = np.loadtxt('../yolov3/data/coco.names',
dtype=str,
delimiter='\n')
nms.stringClassLabels.vector.extend(labels)
nms_model = coremltools.models.MLModel(nms_spec)
nms_model.save(name + '_nms.mlmodel')
# 4. Pipeline models togethor
from coremltools.models import datatypes
# from coremltools.models import neural_network
from coremltools.models.pipeline import Pipeline
input_features = [('image', datatypes.Array(3, 416, 416)),
('iouThreshold', datatypes.Double()),
('confidenceThreshold', datatypes.Double())]
output_features = ['confidence', 'coordinates']
pipeline = Pipeline(input_features, output_features)
# Add 3rd dimension of size 1 (apparently not needed, produces error on compile)
# ssd_output = coreml_model._spec.description.output
# ssd_output[0].type.multiArrayType.shape[:] = [num_classes, num_anchors, 1]
# ssd_output[1].type.multiArrayType.shape[:] = [4, num_anchors, 1]
# And now we can add the three models, in order:
pipeline.add_model(coreml_model)
pipeline.add_model(nms_model)
# Correct datatypes
pipeline.spec.description.input[0].ParseFromString(
coreml_model._spec.description.input[0].SerializeToString())
pipeline.spec.description.output[0].ParseFromString(
nms_model._spec.description.output[0].SerializeToString())
pipeline.spec.description.output[1].ParseFromString(
nms_model._spec.description.output[1].SerializeToString())
# Update metadata
pipeline.spec.description.metadata.versionString = 'yolov3-tiny.pt imported from PyTorch'
pipeline.spec.description.metadata.shortDescription = 'https://github.com/ultralytics/yolov3'
pipeline.spec.description.metadata.author = '*****@*****.**'
pipeline.spec.description.metadata.license = 'https://github.com/ultralytics/yolov3'
user_defined_metadata = {
'classes': ','.join(labels),
'iou_threshold': str(nms.iouThreshold),
'confidence_threshold': str(nms.confidenceThreshold)
}
pipeline.spec.description.metadata.userDefined.update(
user_defined_metadata)
# Save the model
pipeline.spec.specificationVersion = 3
final_model = coremltools.models.MLModel(pipeline.spec)
final_model.save((name + '_pipelined.mlmodel'))
def quantize(model, per_channel=True, nbits=8, quantization_mode=QuantizationMode.IntegerOps,
static=False, asymmetric_input_types=False, input_quantization_params=None, output_quantization_params=None):
'''
Given an onnx model, create a quantized onnx model and save it into a file
:param model: ModelProto to quantize
:param per_channel: quantize weights per channel
:param nbits: number of bits to represent quantized data. Currently only supporting 8-bit types
:param quantization_mode: Can be one of the QuantizationMode types.
IntegerOps:
the function will use integer ops. Only ConvInteger and MatMulInteger ops are supported now.
QLinearOps:
the function will use QLinear ops. Only QLinearConv and QLinearMatMul ops are supported now.
:param static:
True: The inputs/activations are quantized using static scale and zero point values
specified through input_quantization_params.
False: The inputs/activations are quantized using dynamic scale and zero point values
computed while running the model.
:param asymmetric_input_types:
True: Weights are quantized into signed integers and inputs/activations into unsigned integers.
False: Weights and inputs/activations are quantized into unsigned integers.
:param input_quantization_params:
Dictionary to specify the zero point and scale values for inputs to conv and matmul nodes.
Should be specified when static is set to True.
The input_quantization_params should be specified in the following format:
{
"input_name": [zero_point, scale]
}.
zero_point should be of type np.uint8 and scale should be of type np.float32.
example:
{
'resnet_model/Relu_1:0': [np.uint8(0), np.float32(0.019539741799235344)],
'resnet_model/Relu_2:0': [np.uint8(0), np.float32(0.011359662748873234)]
}
:param output_quantization_params:
Dictionary to specify the zero point and scale values for outputs of conv and matmul nodes.
Should be specified in QuantizationMode.QLinearOps mode.
The output_quantization_params should be specified in the following format:
{
"output_name": [zero_point, scale]
}
zero_point can be of type np.uint8/np.int8 and scale should be of type np.float32.
example:
{
'resnet_model/Relu_3:0': [np.int8(0), np.float32(0.011359662748873234)],
'resnet_model/Relu_4:0': [np.uint8(0), np.float32(0.011359662748873234)]
}
:return: ModelProto with quantization
'''
if nbits == 8:
input_qType = onnx_proto.TensorProto.UINT8
weight_qType = onnx_proto.TensorProto.INT8 if asymmetric_input_types else onnx_proto.TensorProto.UINT8
mode = quantization_mode
copy_model = onnx_proto.ModelProto()
copy_model.CopyFrom(model)
quantizer = ONNXQuantizer(copy_model, per_channel, mode, static, weight_qType, input_qType,
input_quantization_params, output_quantization_params)
quantizer.quantize_model()
quantizer.model.producer_name = __producer__
quantizer.model.producer_version = __version__
return quantizer.model
else:
raise ValueError('Unknown value for nbits. only 8 bit quantization is currently supported')
def onnx_to_coreml(onnx_model, output): # type: (IO[str], str) -> None
onnx_model_proto = onnx_pb.ModelProto()
onnx_model_proto.ParseFromString(onnx_model.read())
coreml_model = convert(onnx_model_proto)
coreml_model.save(output)
def quantize(model,
per_channel=False,
nbits=8,
quantization_mode=QuantizationMode.IntegerOps,
static=False,
force_fusions=False,
symmetric_activation=False,
symmetric_weight=False,
quantization_params=None,
nodes_to_quantize=None,
nodes_to_exclude=None,
op_types_to_quantize=[]):
'''
Given an onnx model, create a quantized onnx model and save it into a file
:param model: ModelProto to quantize
:param per_channel: quantize weights per channel
:param nbits: number of bits to represent quantized data. Currently only supporting 8-bit types
:param quantization_mode: Can be one of the QuantizationMode types.
IntegerOps:
the function will use integer ops. Only ConvInteger and MatMulInteger ops are supported now.
QLinearOps:
the function will use QLinear ops. Only QLinearConv and QLinearMatMul ops are supported now.
:param static:
True: The inputs/activations are quantized using static scale and zero point values
specified through quantization_params.
False: The inputs/activations are quantized using dynamic scale and zero point values
computed while running the model.
:param symmetric_activation:
True: activations are quantized into signed integers.
False: activations are quantized into unsigned integers.
:param symmetric_weight:
True: weights are quantized into signed integers.
False: weights are quantized into unsigned integers.
:param quantization_params:
Dictionary to specify the zero point and scale values for inputs to conv and matmul nodes.
Should be specified when static is set to True.
The quantization_params should be specified in the following format:
{
"input_name": [zero_point, scale]
}.
zero_point should be of type np.uint8 and scale should be of type np.float32.
example:
{
'resnet_model/Relu_1:0': [np.uint8(0), np.float32(0.019539741799235344)],
'resnet_model/Relu_2:0': [np.uint8(0), np.float32(0.011359662748873234)]
}
:param nodes_to_quantize:
List of nodes names to quantize. When this list is not None only the nodes in this list
are quantized.
example:
[
'Conv__224',
'Conv__252'
]
:param nodes_to_exclude:
List of nodes names to exclude. The nodes in this list will be excluded from quantization
when it is not None.
:param op_types_to_quantize: specify the types of operators to quantize, like ['Conv'] to quantize Conv only. It quantizes all supported operators by default.
:return: ModelProto with quantization
'''
logging.warning("onnxruntime.quantization.quantize is deprecated.\n\
Please use quantize_static for static quantization, quantize_dynamic for dynamic quantization."
)
if nbits == 8 or nbits == 7:
mode = quantization_mode
copy_model = onnx_proto.ModelProto()
copy_model.CopyFrom(model)
if not op_types_to_quantize or len(op_types_to_quantize) == 0:
op_types_to_quantize = list(
QLinearOpsRegistry.keys()) if static else list(
IntegerOpsRegistry.keys())
quantizer = ONNXQuantizer(copy_model, per_channel, nbits == 7, mode,
static, symmetric_weight,
symmetric_activation, quantization_params,
nodes_to_quantize, nodes_to_exclude,
op_types_to_quantize)
quantizer.quantize_model()
return quantizer.model.model
else:
raise ValueError(
'Only 8 and 7 bit quantization is currently supported')
def main():
os.system('rm -rf saved_models && mkdir saved_models')
files = glob.glob('saved_models/*.onnx') + \
glob.glob('../yolov3/weights/*.onnx')
for f in files:
# 1. ONNX to CoreML
name = 'saved_models/' + f.split('/')[-1].replace('.onnx', '')
# # Load the ONNX model
model = onnx.load(f)
# Check that the IR is well formed
print(onnx.checker.check_model(model))
# Print a human readable representation of the graph
print(onnx.helper.printable_graph(model.graph))
model_file = open(f, 'rb')
model_proto = onnx_pb.ModelProto()
model_proto.ParseFromString(model_file.read())
yolov3_model = convert(model_proto,
image_input_names=['0'],
preprocessing_args={'image_scale': 1. / 255})
# 2. Reduce model to FP16, change outputs to DOUBLE and save
import coremltools
spec = yolov3_model.get_spec()
for i in range(2):
spec.description.output[i].type.multiArrayType.dataType = \
coremltools.proto.FeatureTypes_pb2.ArrayFeatureType.ArrayDataType.Value(
'DOUBLE')
spec = coremltools.utils.convert_neural_network_spec_weights_to_fp16(
spec)
yolov3_model = coremltools.models.MLModel(spec)
name_out0 = spec.description.output[0].name
name_out1 = spec.description.output[1].name
num_classes = 80
num_anchors = 507 # 507 for yolov3-tiny,
spec.description.output[0].type.multiArrayType.shape.append(
num_anchors)
spec.description.output[0].type.multiArrayType.shape.append(
num_classes)
# spec.description.output[0].type.multiArrayType.shape.append(1)
spec.description.output[1].type.multiArrayType.shape.append(
num_anchors)
spec.description.output[1].type.multiArrayType.shape.append(4)
# spec.description.output[1].type.multiArrayType.shape.append(1)
# rename
# input_mlmodel = input_tensor.replace(":", "__").replace("/", "__")
# class_output_mlmodel = class_output_tensor.replace(":", "__").replace("/", "__")
# bbox_output_mlmodel = bbox_output_tensor.replace(":", "__").replace("/", "__")
#
# for i in range(len(spec.neuralNetwork.layers)):
# if spec.neuralNetwork.layers[i].input[0] == input_mlmodel:
# spec.neuralNetwork.layers[i].input[0] = 'image'
# if spec.neuralNetwork.layers[i].output[0] == class_output_mlmodel:
# spec.neuralNetwork.layers[i].output[0] = 'scores'
# if spec.neuralNetwork.layers[i].output[0] == bbox_output_mlmodel:
# spec.neuralNetwork.layers[i].output[0] = 'boxes'
spec.neuralNetwork.preprocessing[0].featureName = '0'
yolov3_model.save(name + '.mlmodel')
# yolov3_model.visualize_spec()
print(spec.description)
# 2.5. Try to Predict:
from PIL import Image
img = Image.open('../yolov3/data/samples/zidane_416.jpg')
out = yolov3_model.predict({'0': img}, useCPUOnly=True)
print(out[name_out0].shape, out[name_out1].shape)
# 3. Create NMS protobuf
import numpy as np
nms_spec = coremltools.proto.Model_pb2.Model()
nms_spec.specificationVersion = 3
for i in range(2):
decoder_output = yolov3_model._spec.description.output[
i].SerializeToString()
nms_spec.description.input.add()
nms_spec.description.input[i].ParseFromString(decoder_output)
nms_spec.description.output.add()
nms_spec.description.output[i].ParseFromString(decoder_output)
nms_spec.description.output[0].name = 'confidence'
nms_spec.description.output[1].name = 'coordinates'
output_sizes = [num_classes, 4]
for i in range(2):
ma_type = nms_spec.description.output[i].type.multiArrayType
ma_type.shapeRange.sizeRanges.add()
ma_type.shapeRange.sizeRanges[0].lowerBound = 0
ma_type.shapeRange.sizeRanges[0].upperBound = -1
ma_type.shapeRange.sizeRanges.add()
ma_type.shapeRange.sizeRanges[1].lowerBound = output_sizes[i]
ma_type.shapeRange.sizeRanges[1].upperBound = output_sizes[i]
del ma_type.shape[:]
nms = nms_spec.nonMaximumSuppression
nms.confidenceInputFeatureName = name_out0 # 1x507x80
nms.coordinatesInputFeatureName = name_out1 # 1x507x4
nms.confidenceOutputFeatureName = 'confidence'
nms.coordinatesOutputFeatureName = 'coordinates'
nms.iouThresholdInputFeatureName = 'iouThreshold'
nms.confidenceThresholdInputFeatureName = 'confidenceThreshold'
nms.iouThreshold = 0.4
nms.confidenceThreshold = 0.5
nms.pickTop.perClass = True
labels = np.loadtxt('../yolov3/data/coco.names',
dtype=str,
delimiter='\n')
nms.stringClassLabels.vector.extend(labels)
nms_model = coremltools.models.MLModel(nms_spec)
nms_model.save(name + '_nms.mlmodel')
# out_nms = nms_model.predict({
# '143': out['143'].squeeze().reshape((80, 507)),
# '144': out['144'].squeeze().reshape((4, 507))
# })
# print(out_nms['confidence'].shape, out_nms['coordinates'].shape)
# # # 3.5 Add Softmax model
# from coremltools.models import datatypes
# from coremltools.models import neural_network
#
# input_features = [
# ("141", datatypes.Array(num_anchors, num_classes, 1)),
# ("143", datatypes.Array(num_anchors, 4, 1))
# ]
#
# output_features = [
# ("141", datatypes.Array(num_anchors, num_classes, 1)),
# ("143", datatypes.Array(num_anchors, 4, 1))
# ]
#
# builder = neural_network.NeuralNetworkBuilder(input_features, output_features)
# builder.add_softmax(name="softmax_pcls",
# dim=(0, 3, 2, 1),
# input_name="scores",
# output_name="permute_scores_output")
# softmax_model = coremltools.models.MLModel(builder.spec)
# softmax_model.save("softmax.mlmodel")
# 4. Pipeline models togethor
from coremltools.models import datatypes
# from coremltools.models import neural_network
from coremltools.models.pipeline import Pipeline
input_features = [('0', datatypes.Array(3, 416, 416)),
('iouThreshold', datatypes.Double()),
('confidenceThreshold', datatypes.Double())]
output_features = ['confidence', 'coordinates']
pipeline = Pipeline(input_features, output_features)
# Add 3rd dimension of size 1 (apparently not needed, produces error on compile)
yolov3_output = yolov3_model._spec.description.output
yolov3_output[0].type.multiArrayType.shape[:] = [
num_anchors, num_classes, 1
]
yolov3_output[1].type.multiArrayType.shape[:] = [num_anchors, 4, 1]
nms_input = nms_model._spec.description.input
for i in range(2):
nms_input[i].type.multiArrayType.shape[:] = yolov3_output[
i].type.multiArrayType.shape[:]
# And now we can add the three models, in order:
pipeline.add_model(yolov3_model)
pipeline.add_model(nms_model)
# Correct datatypes
pipeline.spec.description.input[0].ParseFromString(
yolov3_model._spec.description.input[0].SerializeToString())
pipeline.spec.description.output[0].ParseFromString(
nms_model._spec.description.output[0].SerializeToString())
pipeline.spec.description.output[1].ParseFromString(
nms_model._spec.description.output[1].SerializeToString())
# Update metadata
pipeline.spec.description.metadata.versionString = 'yolov3-tiny.pt imported from PyTorch'
pipeline.spec.description.metadata.shortDescription = 'https://github.com/ultralytics/yolov3'
pipeline.spec.description.metadata.author = '*****@*****.**'
pipeline.spec.description.metadata.license = 'https://github.com/ultralytics/yolov3'
user_defined_metadata = {
'classes': ','.join(labels),
'iou_threshold': str(nms.iouThreshold),
'confidence_threshold': str(nms.confidenceThreshold)
}
pipeline.spec.description.metadata.userDefined.update(
user_defined_metadata)
# Save the model
pipeline.spec.specificationVersion = 3
final_model = coremltools.models.MLModel(pipeline.spec)
final_model.save((name + '_pipelined.mlmodel'))
def main(input_file, output_file):
num_classes = 8
model_ft = models.resnet18(pretrained=False)
num_ftrs = model_ft.fc.in_features
model_ft.fc = nn.Sequential(nn.Dropout(p=.5),
nn.Linear(num_ftrs, num_classes), nn.Sigmoid())
checkpoint = torch.load(input_file,
map_location=lambda storage, loc: storage)
model_ft.load_state_dict(checkpoint['model'])
imsize = 224
dummy_input = torch.randn(1, 3, 224, 224, requires_grad=True)
protofile = output_file + '.proto'
model_ft.train(False)
model_ft.eval()
model_ft.cpu()
torch.onnx.export(model_ft,
dummy_input,
protofile,
input_names=['0'],
output_names=['classification'],
verbose=True)
model = onnx.load(protofile)
scale = 1.0 / (0.226 * 255.0)
red_scale = 1.0 / (0.229 * 255.0)
green_scale = 1.0 / (0.224 * 255.0)
blue_scale = 1.0 / (0.225 * 255.0)
args = dict(is_bgr=False,
red_bias=-(0.485 * 255.0),
green_bias=-(0.456 * 255.0),
blue_bias=-(0.406 * 255.0))
model_file = open(protofile, 'rb')
model_proto = onnx_pb.ModelProto()
model_proto.ParseFromString(model_file.read())
coreml_model = convert(model_proto,
image_input_names=['0'],
preprocessing_args=args)
spec = coreml_model.get_spec()
# get NN portion of the spec
nn_spec = spec.neuralNetwork
layers = nn_spec.layers # this is a list of all the layers
layers_copy = copy.deepcopy(
layers) # make a copy of the layers, these will be added back later
del nn_spec.layers[:] # delete all the layers
# add a scale layer now
# since mlmodel is in protobuf format, we can add proto messages directly
# To look at more examples on how to add other layers: see "builder.py" file in coremltools repo
scale_layer = nn_spec.layers.add()
scale_layer.name = 'scale_layer'
scale_layer.input.append('0')
scale_layer.output.append('input1_scaled')
params = scale_layer.scale
params.scale.floatValue.extend([red_scale, green_scale,
blue_scale]) # scale values for RGB
params.shapeScale.extend([3, 1, 1]) # shape of the scale vector
# now add back the rest of the layers (which happens to be just one in this case: the crop layer)
nn_spec.layers.extend(layers_copy)
# need to also change the input of the crop layer to match the output of the scale layer
nn_spec.layers[1].input[0] = 'input1_scaled'
print(spec.description)
coreml_model = coremltools.models.MLModel(spec)
coreml_model.save(output_file)
def augment_graph(self):
'''
Adds ReduceMin and ReduceMax nodes to all quantization_candidates op type nodes in
model and ensures their outputs are stored as part of the graph output
:return: augmented ONNX model
'''
model = onnx_proto.ModelProto()
model.CopyFrom(self.model)
model = onnx.shape_inference.infer_shapes(model)
added_nodes = []
added_outputs = []
tensors, value_infos = self.select_tensors_to_calibrate(model)
for tensor in tensors:
# When doing ReduceMax/ReduceMin, keep dimension if tensor contains dim with value of 0,
# for example:
# dim = [ dim_value: 0 ]
#
# otherwise, don't keep dimension.
#
dim = value_infos[tensor].type.tensor_type.shape.dim
keepdims = 0
shape = ()
for d in dim:
# A dimension can be either an integer value or a symbolic variable.
# Dimension with integer value and value of 0 is what we are looking for to keep dimension.
# Please see the def of TensorShapeProto https://github.com/onnx/onnx/blob/master/onnx/onnx.proto#L630
if d.WhichOneof('value') == 'dim_value' and d.dim_value == 0:
keepdims = 1
shape = (1, ) if len(dim) == 1 else list(
1 for i in range(len(dim)))
break
# Adding ReduceMin nodes
reduce_min_name = tensor + '_ReduceMin'
reduce_min_node = onnx.helper.make_node('ReduceMin', [tensor],
[tensor + '_ReduceMin'],
reduce_min_name,
keepdims=keepdims)
added_nodes.append(reduce_min_node)
added_outputs.append(
helper.make_tensor_value_info(reduce_min_node.output[0],
TensorProto.FLOAT, shape))
# Adding ReduceMax nodes
reduce_max_name = tensor + '_ReduceMax'
reduce_max_node = onnx.helper.make_node('ReduceMax', [tensor],
[tensor + '_ReduceMax'],
reduce_max_name,
keepdims=keepdims)
added_nodes.append(reduce_max_node)
added_outputs.append(
helper.make_tensor_value_info(reduce_max_node.output[0],
TensorProto.FLOAT, shape))
model.graph.node.extend(added_nodes)
model.graph.output.extend(added_outputs)
onnx.save(model, self.augmented_model_path)
self.augment_model = model
import sys
from onnx import onnx_pb
from onnx_coreml import convert
model_in = sys.argv[1]
model_out = sys.argv[2]
model_file = open(model_in, 'rb')
model_proto = onnx_pb.ModelProto()
model_proto.ParseFromString(model_file.read())
coreml_model = convert(model_proto,
image_input_names=['inputImage'],
image_output_names=['outputImage'])
coreml_model.save(model_out)
#!/usr/bin/env python3
import sys
from google.protobuf import text_format
from onnx import onnx_pb
with open(sys.argv[1]) as f:
c = f.read()
m = onnx_pb.ModelProto()
text_format.Merge(c, m)
with open(sys.argv[2], 'wb') as f:
f.write(m.SerializeToString())