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...DG/prepare_model/convert_model/tf_specific/Convert_RetinaNet_From_Tensorflow.md
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| # Converting RetinaNet Model from TensorFlow* to the Intermediate Representation {#openvino_docs_MO_DG_prepare_model_convert_model_tf_specific_Convert_RetinaNet_From_Tensorflow} | ||
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| This tutorial explains how to convert RetinaNet model to the Intermediate Representation (IR). | ||
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| [Public RetinaNet model](https://github.com/fizyr/keras-retinanet) does not contain pretrained TensorFlow\* weights. | ||
| To convert this model to the TensorFlow\* format, you can use [Reproduce Keras* to TensorFlow* Conversion tutorial](https://docs.openvinotoolkit.org/latest/omz_models_model_retinanet_tf.html). | ||
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| After you convert the model to TensorFlow* format, run the Model Optimizer command below: | ||
| ```sh | ||
| python mo.py --input "input_1[1 1333 1333 3]" --input_model retinanet_resnet50_coco_best_v2.1.0.pb --data_type FP32 --transformations_config ./extensions/front/tf/retinanet.json | ||
| ``` | ||
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| Where `transformations_config` command-line parameter specifies the configuration json file containing model conversion hints for the Model Optimizer. | ||
| The json file contains some parameters that need to be changed if you train the model yourself. It also contains information on how to match endpoints | ||
| to replace the subgraph nodes. After the model is converted to IR, the output nodes will be replaced with DetectionOutput layer. |
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| ## If <a name="If"></a> {#openvino_docs_ops_infrastructure_If_8} | ||
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| **Versioned name**: *If-8* | ||
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| **Category**: Infrastructure | ||
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| **Short description**: *If* operation contains two internal networks(subgraphs) such as `then_body` and `else_body`, | ||
| and performs one of them depending on `cond` value. If `cond` is `True`, `then_body` is executed. If `cond` is `False`, | ||
| the operation executes the `else_body` subgraph. | ||
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| **Detailed description** | ||
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| *If* must not contain empty subgraphs. Each of them must have at least one operation `Result`. | ||
| Also the number of outputs from *If* always must be greater than zero and equal to the number of outputs from each subgraph. | ||
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| **If attributes**: | ||
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| * **Subgraphs**: | ||
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| `then_body`/`else_body` are subgraphs that are executed depending on the `cond` value. | ||
| The subgraph is described operation by operation as a typical IR network. | ||
| The subgraph has inputs (`Parameter` operations) and outputs (`Result` operations). | ||
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| * **Subgraph's inputs** - inputs to the subgraph which associated with *If* inputs via *port_map*. | ||
| The subgraph can have any number of inputs (even zero). | ||
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| * **Subgraph's outputs** - outputs from the subgraph which associated with *If* outputs via *port_map*. | ||
| The subgraph must contain at least one output. Each *If* output is associated with one output from the subgraph. | ||
| Therefore the number of `then_body` outputs is equal to the number of outputs from *If* and | ||
| the number of `else_body` outputs. | ||
| The type of the subgraph output and the type of the associated output from *If* must be equal. | ||
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| * **Port maps**: | ||
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| *port_map* is a set of rules to map input or output data tensors of *If* operation onto the subgraph data tensors. | ||
| The `port_map` entries can be `input` and `output`. Each entry describes a corresponding mapping rule. | ||
| *If* has two *port_maps*: `then_port_map` for `then_body` and `else_port_map` for `else_body`. | ||
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| * **Port map attributes**: | ||
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| * *external_port_id* | ||
| * **Description**: *external_port_id* is a port ID of *If* operation. | ||
| * **Range of values**: IDs of the *If* inputs and outputs | ||
| * **Type**: `unsigned int` | ||
| * **Default value**: None | ||
| * **Required**: *yes* | ||
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| * *internal_layer_id* | ||
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| * **Description**: *internal_layer_id* is a `Parameter` or `Result` operation ID inside | ||
| the subgraph to map to. | ||
| * **Range of values**: IDs of the `Parameter` or `Result` operations in the subgraph | ||
| * **Type**: `unsigned int` | ||
| * **Default value**: None | ||
| * **Required**: *yes* | ||
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| **If Inputs** | ||
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| * **cond**: A scalar or 1D tensor with 1 element of `boolean` type specifying which subgraph to execute. | ||
| `True` value means to execute the `then_body`, `False` - `else_body`. *Required*. | ||
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| * **Multiple other inputs**: Tensors of different types and shapes. *Optional*. | ||
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| **If Outputs** | ||
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| * **Multiple outputs**: Results of execution of one of the subgraph. Tensors of any type and shape. | ||
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| **Body Inputs** | ||
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| * **Multiple inputs**: Tensors of different types and shapes. *Optional*. | ||
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| **Body Outputs** | ||
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| * **Multiple outputs**: Results of execution of the subgraph. Tensors of any type and shape. | ||
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| **Examples** | ||
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| *Example 1: a typical If structure* | ||
| ```xml | ||
| <layer id="6" name="if/cond" type="If" version="opset8"> | ||
| <input> | ||
| <port id="0"/> | ||
| <port id="1"> | ||
| <dim>2</dim> | ||
| <dim>4</dim> | ||
| </port> | ||
| <port id="2"> | ||
| <dim>2</dim> | ||
| <dim>4</dim> | ||
| </port> | ||
| <port id="3"> | ||
| <dim>2</dim> | ||
| <dim>4</dim> | ||
| </port> | ||
| </input> | ||
| <output> | ||
| <port id="4" names="if/cond/Identity:0,if/cond:0" precision="FP32"> | ||
| <dim>2</dim> | ||
| <dim>4</dim> | ||
| </port> | ||
| </output> | ||
| <then_port_map> | ||
| <input external_port_id="1" internal_layer_id="0"/> | ||
| <input external_port_id="2" internal_layer_id="1"/> | ||
| <output external_port_id="0" internal_layer_id="3"/> | ||
| </then_port_map> | ||
| <else_port_map> | ||
| <input external_port_id="1" internal_layer_id="0"/> | ||
| <input external_port_id="3" internal_layer_id="1"/> | ||
| <output external_port_id="0" internal_layer_id="3"/> | ||
| </else_port_map> | ||
| <then_body> | ||
| <layers> | ||
| <layer id="0" name="add_x" type="Parameter" version="opset1"> | ||
| <data element_type="f32" shape="2,4"/> | ||
| <output> | ||
| <port id="0" names="add_x:0" precision="FP32"> | ||
| <dim>2</dim> | ||
| <dim>4</dim> | ||
| </port> | ||
| </output> | ||
| </layer> | ||
| <layer id="1" name="add_z" type="Parameter" version="opset1"> | ||
| <data element_type="f32" shape="2,4"/> | ||
| <output> | ||
| <port id="0" names="add_z:0" precision="FP32"> | ||
| <dim>2</dim> | ||
| <dim>4</dim> | ||
| </port> | ||
| </output> | ||
| </layer> | ||
| <layer id="2" name="Add" type="Add" version="opset1"> | ||
| <data auto_broadcast="numpy"/> | ||
| <input> | ||
| <port id="0"> | ||
| <dim>2</dim> | ||
| <dim>4</dim> | ||
| </port> | ||
| <port id="1"> | ||
| <dim>2</dim> | ||
| <dim>4</dim> | ||
| </port> | ||
| </input> | ||
| <output> | ||
| <port id="2" names="Add:0" precision="FP32"> | ||
| <dim>2</dim> | ||
| <dim>4</dim> | ||
| </port> | ||
| </output> | ||
| </layer> | ||
| <layer id="3" name="Identity/sink_port_0" type="Result" version="opset1"> | ||
| <input> | ||
| <port id="0"> | ||
| <dim>2</dim> | ||
| <dim>4</dim> | ||
| </port> | ||
| </input> | ||
| </layer> | ||
| </layers> | ||
| <edges> | ||
| <edge from-layer="0" from-port="0" to-layer="2" to-port="0"/> | ||
| <edge from-layer="1" from-port="0" to-layer="2" to-port="1"/> | ||
| <edge from-layer="2" from-port="2" to-layer="3" to-port="0"/> | ||
| </edges> | ||
| </then_body> | ||
| <else_body> | ||
| <layers> | ||
| <layer id="0" name="add_x" type="Parameter" version="opset1"> | ||
| <data element_type="f32" shape="2,4"/> | ||
| <output> | ||
| <port id="0" names="add_x:0" precision="FP32"> | ||
| <dim>2</dim> | ||
| <dim>4</dim> | ||
| </port> | ||
| </output> | ||
| </layer> | ||
| <layer id="1" name="add_w" type="Parameter" version="opset1"> | ||
| <data element_type="f32" shape="2,4"/> | ||
| <output> | ||
| <port id="0" names="add_w:0" precision="FP32"> | ||
| <dim>2</dim> | ||
| <dim>4</dim> | ||
| </port> | ||
| </output> | ||
| </layer> | ||
| <layer id="2" name="Add" type="Add" version="opset1"> | ||
| <data auto_broadcast="numpy"/> | ||
| <input> | ||
| <port id="0"> | ||
| <dim>2</dim> | ||
| <dim>4</dim> | ||
| </port> | ||
| <port id="1"> | ||
| <dim>2</dim> | ||
| <dim>4</dim> | ||
| </port> | ||
| </input> | ||
| <output> | ||
| <port id="2" names="Add:0" precision="FP32"> | ||
| <dim>2</dim> | ||
| <dim>4</dim> | ||
| </port> | ||
| </output> | ||
| </layer> | ||
| <layer id="3" name="Identity/sink_port_0" type="Result" version="opset1"> | ||
| <input> | ||
| <port id="0"> | ||
| <dim>2</dim> | ||
| <dim>4</dim> | ||
| </port> | ||
| </input> | ||
| </layer> | ||
| </layers> | ||
| <edges> | ||
| <edge from-layer="0" from-port="0" to-layer="2" to-port="0"/> | ||
| <edge from-layer="1" from-port="0" to-layer="2" to-port="1"/> | ||
| <edge from-layer="2" from-port="2" to-layer="3" to-port="0"/> | ||
| </edges> | ||
| </else_body> | ||
| </layer> | ||
| ``` |
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