diff --git a/src/common/types.cpp b/src/common/types.cpp
index 1611a919ffe716e31ff83b8673035a048ebe96d2..cea42171f0205e0d40b2703d5c90f0b9fc253e68 100644
--- a/src/common/types.cpp
+++ b/src/common/types.cpp
@@ -40,6 +40,8 @@ const std::string G_OP_TYPE_SPLIT = "split";
 const std::string G_OP_TYPE_FEED = "feed";
 const std::string G_OP_TYPE_FETCH = "fetch";
 const std::string G_OP_TYPE_DEPTHWISE_CONV = "depthwise_conv2d";
+const std::string G_OP_TYPE_IM2SEQUENCE = "im2sequence";
+const std::string G_OP_TYPE_DROPOUT = "dropout";
 
 std::unordered_map<
     std::string, std::pair<std::vector<std::string>, std::vector<std::string>>>
@@ -66,6 +68,8 @@ std::unordered_map<
         {G_OP_TYPE_FC, {{"X", "Y", "Z"}, {"Out"}}},
         {G_OP_TYPE_RESHAPE, {{"X"}, {"Out"}}},
         {G_OP_TYPE_DEPTHWISE_CONV, {{"Input"}, {"Output"}}},
-        {G_OP_TYPE_FUSION_CONV_ADD_RELU, {{"Input"}, {"Out"}}}};
+        {G_OP_TYPE_FUSION_CONV_ADD_RELU, {{"Input"}, {"Out"}}},
+        {G_OP_TYPE_IM2SEQUENCE, {{"X"}, {"Out"}}},
+        {G_OP_TYPE_DROPOUT, {{"X"}, {"Out"}}}};
 
 }  // namespace paddle_mobile
diff --git a/src/common/types.h b/src/common/types.h
index 9134ebe3561153e32db157c4c4b835a1bc464149..ec428b9911f64d7ccc8c6f5dc4be7f970e855d3c 100644
--- a/src/common/types.h
+++ b/src/common/types.h
@@ -96,6 +96,8 @@ extern const std::string G_OP_TYPE_SPLIT;
 extern const std::string G_OP_TYPE_FEED;
 extern const std::string G_OP_TYPE_FETCH;
 extern const std::string G_OP_TYPE_DEPTHWISE_CONV;
+extern const std::string G_OP_TYPE_IM2SEQUENCE;
+extern const std::string G_OP_TYPE_DROPOUT;
 
 extern std::unordered_map<
     std::string, std::pair<std::vector<std::string>, std::vector<std::string>>>
diff --git a/src/operators/dropout_op.cpp b/src/operators/dropout_op.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..709d83a1f57b7faa0ecce1f1f8590c86c1eba1a8
--- /dev/null
+++ b/src/operators/dropout_op.cpp
@@ -0,0 +1,39 @@
+/* Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#ifdef DROPOUT_OP
+#include "operators/dropout_op.h"
+namespace paddle_mobile {
+namespace operators {
+
+template <typename Dtype, typename T>
+void DropoutOp<Dtype, T>::InferShape() const {
+  auto input_dims = this->param_.InputX()->dims();
+  this->param_.Out()->Resize(input_dims);
+}
+template class DropoutOp<CPU, float>;
+}  // namespace operators
+}  // namespace paddle_mobile
+
+namespace ops = paddle_mobile::operators;
+#ifdef PADDLE_MOBILE_CPU
+USE_OP_CPU(dropout);
+REGISTER_OPERATOR_CPU(dropout, ops::DropoutOp);
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+#endif
+
+#endif
diff --git a/src/operators/dropout_op.h b/src/operators/dropout_op.h
new file mode 100644
index 0000000000000000000000000000000000000000..bc2986b791e9069e8782d778a0f16cb639ac4396
--- /dev/null
+++ b/src/operators/dropout_op.h
@@ -0,0 +1,53 @@
+/* Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#ifdef DROPOUT_OP
+
+#pragma once
+
+#include <string>
+
+#include "framework/operator.h"
+#include "operators/kernel/dropout_kernel.h"
+#include "operators/op_param.h"
+
+namespace paddle_mobile {
+namespace operators {
+
+using paddle_mobile::framework::Tensor;
+
+template <typename DeviceType, typename T>
+class DropoutOp
+    : public framework::OperatorWithKernel<
+          DeviceType, DropoutParam, operators::DropoutKernel<DeviceType, T>> {
+ public:
+  DropoutOp(const std::string &type, const VariableNameMap &inputs,
+            const VariableNameMap &outputs, const framework::AttributeMap attrs,
+            std::shared_ptr<framework::Scope> scope)
+      : framework::OperatorWithKernel<DeviceType, DropoutParam,
+                                      operators::DropoutKernel<DeviceType, T>>(
+            type, inputs, outputs, attrs, scope) {}
+
+  // using framework::OperatorWithKernel<DeviceType, DropoutParam,
+  //                                    operators::DropoutKernel<DeviceType,
+  //                                    T>>;
+  void InferShape() const override;
+
+ protected:
+};
+
+}  // namespace operators
+}  // namespace paddle_mobile
+
+#endif
diff --git a/src/operators/im2sequence_op.cpp b/src/operators/im2sequence_op.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..2cb2d6398f85f461bd6214e2631dd0a8f951fb2d
--- /dev/null
+++ b/src/operators/im2sequence_op.cpp
@@ -0,0 +1,65 @@
+/* Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#ifdef IM2SEQUENCE_OP
+
+#include "operators/im2sequence_op.h"
+
+namespace paddle_mobile {
+namespace operators {
+
+int Im2SequenceOutputSize(int input_size, int kernel, int padding_1,
+                          int padding_2, int stride) {
+  int output_size =
+      1 + (padding_1 + padding_2 + input_size - kernel + stride - 1) / stride;
+  return output_size;
+}
+
+template <typename Dtype, typename T>
+void Im2SequenceOp<Dtype, T>::InferShape() const {
+  auto in_x_dims = this->param_.Input()->dims();
+
+  const std::vector<int> &kernels = this->param_.Kernels();
+
+  const std::vector<int> &strides = this->param_.Strides();
+
+  std::vector<int> paddings = this->param_.Paddings();
+
+  std::vector<int64_t> output_shape({in_x_dims[0], in_x_dims[1]});
+  for (size_t i = 0; i < strides.size(); ++i) {
+    output_shape.push_back(Im2SequenceOutputSize(in_x_dims[i + 2], kernels[i],
+                                                 paddings[i], paddings[i + 2],
+                                                 strides[i]));
+  }
+
+  framework::DDim ddim = framework::make_ddim(output_shape);
+  this->param_.Output()->Resize(ddim);
+}
+
+template class Im2SequenceOp<CPU, float>;
+
+}  // namespace operators
+}  // namespace paddle_mobile
+
+namespace ops = paddle_mobile::operators;
+#ifdef PADDLE_MOBILE_CPU
+USE_OP_CPU(im2sequence);
+REGISTER_OPERATOR_CPU(im2sequence, ops::Im2SequenceOp);
+#endif
+#ifdef PADDLE_MOBILE_MALI_GPU
+#endif
+#ifdef PADDLE_MOBILE_FPGA
+#endif
+
+#endif
diff --git a/src/operators/im2sequence_op.h b/src/operators/im2sequence_op.h
new file mode 100644
index 0000000000000000000000000000000000000000..4c4dee617277bcee874d1fcd840c7ddd8fd68cbd
--- /dev/null
+++ b/src/operators/im2sequence_op.h
@@ -0,0 +1,53 @@
+/* Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#ifdef IM2SEQUENCE_OP
+
+#pragma once
+
+#include <operators/op_param.h>
+#include "framework/operator.h"
+#include "operators/kernel/im2sequence_kernel.h"
+
+namespace paddle_mobile {
+namespace operators {
+
+using namespace framework;
+
+template <typename DeviceType, typename T>
+class Im2SequenceOp : public framework::OperatorWithKernel<
+                          DeviceType, Im2SequenceParam,
+                          operators::Im2SequenceKernel<DeviceType, T>> {
+ public:
+  Im2SequenceOp(const std::string &type, const VariableNameMap &inputs,
+                const VariableNameMap &outputs,
+                const framework::AttributeMap &attrs,
+                std::shared_ptr<framework::Scope> scope)
+      : framework::OperatorWithKernel<
+            DeviceType, Im2SequenceParam,
+            operators::Im2SequenceKernel<DeviceType, T>>(type, inputs, outputs,
+                                                         attrs, scope) {}
+
+  // using framework::OperatorWithKernel<
+  //    DeviceType, Im2SequenceParam,
+  //    operators::Im2SequenceKernel<DeviceType, T>>::OperatorWithKernel;
+  void InferShape() const override;
+
+ private:
+};
+
+}  // namespace operators
+}  // namespace paddle_mobile
+
+#endif
diff --git a/src/operators/kernel/arm/dropout_kernel.cpp b/src/operators/kernel/arm/dropout_kernel.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..af16048a1b4eba2ff36f842b6cf968031989576e
--- /dev/null
+++ b/src/operators/kernel/arm/dropout_kernel.cpp
@@ -0,0 +1,49 @@
+/* Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#ifdef DROPOUT_OP
+
+#pragma once
+
+#include "operators/kernel/dropout_kernel.h"
+#include <operators/math/transform.h>
+
+namespace paddle_mobile {
+namespace operators {
+
+template <>
+bool DropoutKernel<CPU, float>::Init(DropoutParam *para) {
+  return true;
+}
+
+template <typename T>
+struct DropoutFunctor {
+  inline T operator()(T in) const { return in; }
+};
+
+template <>
+void DropoutKernel<CPU, float>::Compute(const DropoutParam &param) const {
+  const auto *input_x = param.InputX();
+  auto *input_x_ptr = input_x->data<float>();
+  auto *out = param.Out();
+  auto *out_ptr = out->mutable_data<float>();
+
+  DropoutFunctor<float> func_;
+  math::Transform trans;
+  trans(input_x_ptr, input_x_ptr + input_x->numel(), out_ptr, func_);
+}
+}  // namespace operators
+}  // namespace paddle_mobile
+
+#endif
diff --git a/src/operators/kernel/arm/im2sequence_kernel.cpp b/src/operators/kernel/arm/im2sequence_kernel.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..709fa30a23d4efba3531d9bc567c99f53875bc12
--- /dev/null
+++ b/src/operators/kernel/arm/im2sequence_kernel.cpp
@@ -0,0 +1,78 @@
+/* Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#ifdef IM2SEQUENCE_OP
+
+#include "operators/kernel/im2sequence_kernel.h"
+
+namespace paddle_mobile {
+namespace operators {
+
+template <>
+bool Im2SequenceKernel<CPU, float>::Init(Im2SequenceParam *para) {
+  return true;
+}
+
+inline int Im2SeqOutputSize(int input_size, int filter_size, int padding_0,
+                            int padding_1, int stride) {
+  const int output_size =
+      (input_size + padding_0 + padding_1 - filter_size) / stride + 1;
+  return output_size;
+}
+
+template <>
+void Im2SequenceKernel<CPU, float>::Compute(
+    const Im2SequenceParam &param) const {
+  const Tensor *in_x = param.Input();
+  Tensor *out = param.Output();
+  out->mutable_data<float>();
+
+  std::vector<int> kernels = param.Kernels();
+  std::vector<int> strides = param.Strides();
+  std::vector<int> paddings = param.Paddings();
+
+  auto in_x_dim = in_x->dims();
+  const int batch_size = static_cast<int>(in_x_dim[0]);
+  const int img_channels = static_cast<int>(in_x_dim[1]);
+  const int img_height = static_cast<int>(in_x_dim[2]);
+  const int img_width = static_cast<int>(in_x_dim[3]);
+
+  int output_height = Im2SeqOutputSize(img_height, kernels[0], paddings[0],
+                                       paddings[2], strides[0]);
+  int output_width = Im2SeqOutputSize(img_width, kernels[1], paddings[1],
+                                      paddings[3], strides[1]);
+  const std::vector<int> dilations({1, 1});
+
+  // TODO: verify
+  auto out_dims = out->dims();
+  out->Resize({batch_size, out->numel() / batch_size});
+
+  for (int i = 0; i < batch_size; i++) {
+    const Tensor src =
+        in_x->Slice(i, i + 1).Resize({img_channels, img_height, img_width});
+    Tensor dst = out->Slice(i, i + 1).Resize(
+        {output_height, output_width, img_channels, kernels[0], kernels[1]});
+
+    math::Im2ColFunctor<math::ColFormat::kOCF, CPU, float> f;
+    f(src, dilations, strides, paddings, &dst);
+  }
+  out->Resize(out_dims);
+}
+
+template class Im2SequenceKernel<CPU, float>;
+
+}  // namespace operators
+}  // namespace paddle_mobile
+
+#endif
diff --git a/src/operators/kernel/dropout_kernel.h b/src/operators/kernel/dropout_kernel.h
new file mode 100644
index 0000000000000000000000000000000000000000..5a3783971959db8fba9ca6b701fb6eb6340fcb3f
--- /dev/null
+++ b/src/operators/kernel/dropout_kernel.h
@@ -0,0 +1,34 @@
+/* Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#ifdef DROPOUT_OP
+
+#include "framework/operator.h"
+#include "operators/op_param.h"
+
+#pragma once;
+
+namespace paddle_mobile {
+namespace operators {
+
+template <typename DeviceType, typename T>
+class DropoutKernel : public framework::OpKernelBase<DeviceType, DropoutParam> {
+ public:
+  void Compute(const DropoutParam& param) const;
+  bool Init(DropoutParam* para);
+};
+}  // namespace operators
+}  // namespace paddle_mobile
+
+#endif
diff --git a/src/operators/kernel/im2sequence_kernel.h b/src/operators/kernel/im2sequence_kernel.h
new file mode 100644
index 0000000000000000000000000000000000000000..cb592613f73d90dae5a7d6e515f8bc091981776e
--- /dev/null
+++ b/src/operators/kernel/im2sequence_kernel.h
@@ -0,0 +1,40 @@
+/* Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#ifdef IM2SEQUENCE_OP
+
+#include "framework/operator.h"
+#include "operators/math/im2col.h"
+#include "operators/math/math_function.h"
+#include "operators/math/vol2col.h"
+#include "operators/op_param.h"
+
+#pragma once;
+
+namespace paddle_mobile {
+namespace operators {
+
+using namespace framework;
+
+template <typename DeviceType, typename T>
+class Im2SequenceKernel
+    : public framework::OpKernelBase<DeviceType, Im2SequenceParam> {
+ public:
+  void Compute(const Im2SequenceParam& param) const;
+  bool Init(Im2SequenceParam* para);
+};
+}  // namespace operators
+}  // namespace paddle_mobile
+
+#endif
diff --git a/src/operators/op_param.h b/src/operators/op_param.h
index 229779a127a8dc828da1a1c7ccb3ffe188073f47..c0f0fbc8a9939bc4609e64359835a685dd4c67f9 100644
--- a/src/operators/op_param.h
+++ b/src/operators/op_param.h
@@ -934,5 +934,57 @@ class FusionConvAddBNReluParam : public OpParam {
 
 Print &operator<<(Print &printer, const FusionConvAddParam &conv_param);
 #endif
+
+#ifdef IM2SEQUENCE_OP
+class Im2SequenceParam : public OpParam {
+ public:
+  Im2SequenceParam(const VariableNameMap &inputs,
+                   const VariableNameMap &outputs, const AttributeMap &attrs,
+                   const Scope &scope) {
+    input_x_ = InputXFrom<LoDTensor>(inputs, scope);
+    out_ = OutFrom<LoDTensor>(outputs, scope);
+    kernels_ = GetAttr<vector<int>>("kernels", attrs);
+    strides_ = GetAttr<vector<int>>("strides", attrs);
+    paddings_ = GetAttr<vector<int>>("paddings", attrs);
+  }
+
+  const Tensor *Input() const { return input_x_; }
+
+  Tensor *Output() const { return out_; }
+
+  const vector<int> &Kernels() const { return kernels_; }
+
+  const vector<int> &Strides() const { return strides_; }
+
+  const vector<int> &Paddings() const { return paddings_; }
+
+ private:
+  Tensor *input_x_;
+  Tensor *out_;
+  vector<int> kernels_;
+  vector<int> strides_;
+  vector<int> paddings_;
+};
+#endif
+
+#ifdef DROPOUT_OP
+class DropoutParam : public OpParam {
+ public:
+  DropoutParam(const VariableNameMap &inputs, const VariableNameMap &outputs,
+               const AttributeMap &attrs, const Scope &scope) {
+    input_x_ = InputXFrom<LoDTensor>(inputs, scope);
+    out_ = OutFrom<LoDTensor>(outputs, scope);
+  }
+
+  const Tensor *InputX() const { return input_x_; }
+
+  Tensor *Out() const { return out_; }
+
+ private:
+  Tensor *input_x_;
+  Tensor *out_;
+};
+#endif
+
 }  // namespace operators
 }  // namespace paddle_mobile
diff --git a/test/operators/test_im2sequence_op.cpp b/test/operators/test_im2sequence_op.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..a7512d3bf3cffcb100fe292e50fc7b7b23fa0aa0
--- /dev/null
+++ b/test/operators/test_im2sequence_op.cpp
@@ -0,0 +1,62 @@
+/* Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserved.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License. */
+
+#include "../executor_for_test.h"
+#include "../test_include.h"
+#include "operators/im2sequence_op.h"
+
+int main() {
+  paddle_mobile::Loader<paddle_mobile::CPU> loader;
+  auto program = loader.Load(g_ocr_recg);
+  PADDLE_MOBILE_ENFORCE(program.originProgram != nullptr,
+                        "program file read fail");
+
+  Executor4Test<paddle_mobile::CPU,
+                paddle_mobile::operators::ReluOp<paddle_mobile::CPU, float>>
+      executor(program, "im2sequence");
+
+  // 1. input_tensors;
+  vector<Tensor> input_tensors;
+
+  Tensor input1;
+  auto input1_data = CreateInput<float>(&input1, {2, 2, 3, 3}, -1, 1);
+  input_tensors.push_back(input1);
+
+  // 2. input_names
+  vector<string> input_names({
+      "conv2d_19.tmp_1",
+  });
+
+  // 3. output_names
+  vector<string> output_names({"im2sequence_0.tmp_0"});
+
+  // 4. out_dims;
+  vector<DDim> out_ddims;
+  auto out_ddim = paddle_mobile::framework::make_ddim({8, 9});
+  out_ddims.push_back(out_ddim);
+
+  auto output = executor.Predict<LoDTensor>(input_tensors, input_names,
+                                            output_names, out_ddims);
+
+  auto output0_data = output[0]->data<float>();
+
+  for (int j = 0; j < input_tensors[0].numel(); ++j) {
+    DLOG << " value of input: " << input1_data[j];
+  }
+
+  for (int j = 0; j < output[0]->numel(); ++j) {
+    DLOG << " value of output: " << output0_data[j];
+  }
+  return 0;
+}
diff --git a/tools/op.cmake b/tools/op.cmake
index c7d1840bc552d6b45fe2fcc9f8d19e6784598ee6..8ddf739b5fc112ba0fa588d4d5b354ceaeb8ebde 100644
--- a/tools/op.cmake
+++ b/tools/op.cmake
@@ -66,7 +66,8 @@ else ()
   set(TRANSPOSE_OP ON)
   set(FUSION_CONVADD_RELU_OP ON)
   set(FUSION_CONVADDBNRELU_OP ON)
-
+  set(DROPOUT_OP ON)
+  set(IM2SEQUENCE_OP ON)
   # option(BATCHNORM_OP "" ON)
   # option(BOXCODER_OP "" ON)
   # option(CONCAT_OP "" ON)
@@ -152,3 +153,9 @@ endif()
 if (FUSION_CONVADDBNRELU_OP)
   add_definitions(-DFUSION_CONVADDBNRELU_OP)
 endif()
+if (DROPOUT_OP)
+  add_definitions(-DDROPOUT_OP)
+endif()
+if (IM2SEQUENCE_OP)
+  add_definitions(-DIM2SEQUENCE_OP)
+endif()