Merge pull request opencv#19449 from SamFC10:tf-leakyrelu

* add LeakyRelu to tf-importer

* fix whitespace error

* added test for leakyrelu

Author: jebastin-nadar

modules/dnn/src/tensorflow/tf_importer.cpp

@@ -2414,6 +2414,16 @@ void TFImporter::parseNode(const tensorflow::NodeDef& layer_)
 
             connect(layer_id, dstNet, parsePin(layer.input(0)), id, 0);
         }
+        else if (type == "LeakyRelu")
+        {
+            CV_CheckGT(num_inputs, 0, "");
+            CV_Assert(hasLayerAttr(layer, "alpha"));
+            layerParams.set("negative_slope", getLayerAttr(layer, "alpha").f());
+
+            int id = dstNet.addLayer(name, "ReLU", layerParams);
+            layer_id[name] = id;
+            connectToAllBlobs(layer_id, dstNet, parsePin(layer.input(0)), id, num_inputs);
+        }
         else if (type == "Abs" || type == "Tanh" || type == "Sigmoid" ||
                  type == "Relu" || type == "Elu" ||
                  type == "Identity" || type == "Relu6")

modules/dnn/test/test_tf_importer.cpp

@@ -463,6 +463,7 @@ TEST_P(Test_TensorFlow_layers, leaky_relu)
     if (backend == DNN_BACKEND_INFERENCE_ENGINE_NN_BUILDER_2019 && target == DNN_TARGET_OPENCL)
         applyTestTag(CV_TEST_TAG_DNN_SKIP_IE_OPENCL, CV_TEST_TAG_DNN_SKIP_IE_NN_BUILDER, CV_TEST_TAG_DNN_SKIP_IE_VERSION);
 #endif
+    runTensorFlowNet("leaky_relu");
     runTensorFlowNet("leaky_relu_order1");
     runTensorFlowNet("leaky_relu_order2");
     runTensorFlowNet("leaky_relu_order3");