update code

paddle/operators/prior_box_op.cc

@@ -23,14 +23,14 @@ class PriorBoxOp : public framework::OperatorWithKernel {
 
   void InferShape(framework::InferShapeContext* ctx) const override {
     PADDLE_ENFORCE(ctx->HasInput("Input"),
-                   "Input(X) of PriorBoxOp should not be null.");
+                   "Input(Input) of PriorBoxOp should not be null.");
     PADDLE_ENFORCE(ctx->HasInput("Image"),
-                   "Input(Offset) of PriorBoxOp should not be null.");
+                   "Input(Image) of PriorBoxOp should not be null.");
 
     auto image_dims = ctx->GetInputDim("Image");
     auto input_dims = ctx->GetInputDim("Input");
-    PADDLE_ENFORCE(image_dims.size() == 4, "The format of image is NCHW.");
-    PADDLE_ENFORCE(input_dims.size() == 4, "The format of input is NCHW.");
+    PADDLE_ENFORCE(image_dims.size() == 4, "The layout of image is NCHW.");
+    PADDLE_ENFORCE(input_dims.size() == 4, "The layout of input is NCHW.");
 
     PADDLE_ENFORCE_LT(input_dims[2], image_dims[2],
                       "The height of input must smaller than image.");
@@ -45,7 +45,7 @@ class PriorBoxOp : public framework::OperatorWithKernel {
     bool flip = ctx->Attrs().Get<bool>("flip");
 
     PADDLE_ENFORCE_GT(min_sizes.size(), 0,
-                      "Size of min_size must be at least 1.");
+                      "Size of min_sizes must be at least 1.");
     for (size_t i = 0; i < min_sizes.size(); ++i) {
       PADDLE_ENFORCE_GT(min_sizes[i], 0, "min_sizes[%d] must be positive.", i);
     }
@@ -56,7 +56,7 @@ class PriorBoxOp : public framework::OperatorWithKernel {
     int num_priors = aspect_ratios_vec.size() * min_sizes.size();
     if (max_sizes.size() > 0) {
       PADDLE_ENFORCE_EQ(max_sizes.size(), min_sizes.size(),
-                        "The length of min_size and max_size must be equal.");
+                        "The number of min_size and max_size must be equal.");
       for (size_t i = 0; i < min_sizes.size(); ++i) {
         PADDLE_ENFORCE_GT(max_sizes[i], min_sizes[i],
                           "max_size[%d] must be greater than min_size[%d].", i,
@@ -65,14 +65,11 @@ class PriorBoxOp : public framework::OperatorWithKernel {
       }
     }
 
-    if (variances.size() > 1) {
-      PADDLE_ENFORCE_EQ(variances.size(), 4,
-                        "Must and only provide 4 variance.");
+    PADDLE_ENFORCE_EQ(variances.size(), 4, "Must and only provide 4 variance.");
     for (size_t i = 0; i < variances.size(); ++i) {
       PADDLE_ENFORCE_GT(variances[i], 0.0,
                         "variance[%d] must be greater than 0.", i);
     }
-    }
 
     const float step_h = ctx->Attrs().Get<float>("step_h");
     PADDLE_ENFORCE_GT(step_h, 0.0, "step_h should be larger than 0.");
@@ -95,19 +92,19 @@ class PriorBoxOpMaker : public framework::OpProtoAndCheckerMaker {
       : OpProtoAndCheckerMaker(proto, op_checker) {
     AddInput("Input",
              "(Tensor, default Tensor<float>), "
-             "the input feature data of PriorBoxOp, The format is NCHW.");
+             "the input feature data of PriorBoxOp, The layout is NCHW.");
     AddInput("Image",
              "(Tensor, default Tensor<float>), "
-             "the input image data of PriorBoxOp, The format is NCHW.");
+             "the input image data of PriorBoxOp, The layout is NCHW.");
     AddOutput("Boxes",
               "(Tensor, default Tensor<float>), the output prior boxes of "
-              "PriorBoxOp. The format is [layer_height, layer_width, "
+              "PriorBoxOp. The layout is [layer_height, layer_width, "
               "num_priors, 4]. layer_height is the height of input, "
               "layer_width is the width of input, num_priors is the box "
               "count of each position.");
     AddOutput("Variances",
               "(Tensor, default Tensor<float>), the expanded variances of "
-              "PriorBoxOp. The format is [layer_height, layer_width, "
+              "PriorBoxOp. The layout is [layer_height, layer_width, "
               "num_priors, 4]. layer_height is the height of input, "
               "layer_width is the width of input, num_priors is the box "
               "count of each position.");
@@ -117,12 +114,10 @@ class PriorBoxOpMaker : public framework::OpProtoAndCheckerMaker {
                               "List of max sizes of generated prior boxes.");
     AddAttr<std::vector<float>>(
         "aspect_ratios", "(vector<float>) ",
-        "List of aspect ratios of generated prior boxes.")
-        .SetDefault({});
+        "List of aspect ratios of generated prior boxes.");
     AddAttr<std::vector<float>>(
         "variances", "(vector<float>) ",
-        "List of variances to be encoded in prior boxes.")
-        .SetDefault({0.1});
+        "List of variances to be encoded in prior boxes.");
     AddAttr<bool>("flip", "(bool) ", "Whether to flip aspect ratios.")
         .SetDefault(true);
     AddAttr<bool>("clip", "(bool) ", "Whether to clip out-of-boundary boxes.")

paddle/operators/prior_box_op.h

@@ -70,9 +70,9 @@ class PriorBoxOpKernel : public framework::OpKernel<T> {
     std::vector<float> aspect_ratios;
     ExpandAspectRatios(input_aspect_ratio, flip, aspect_ratios);
 
-    auto step_w = ctx.Attr<float>("step_w");
-    auto step_h = ctx.Attr<float>("step_h");
-    auto offset = ctx.Attr<float>("offset");
+    T step_w = static_cast<T>(ctx.Attr<float>("step_w"));
+    T step_h = static_cast<T>(ctx.Attr<float>("step_h"));
+    T offset = static_cast<T>(ctx.Attr<float>("offset"));
 
     auto img_width = image->dims()[3];
     auto img_height = image->dims()[2];
@@ -80,10 +80,10 @@ class PriorBoxOpKernel : public framework::OpKernel<T> {
     auto layer_width = input->dims()[3];
     auto layer_height = input->dims()[2];
 
-    float step_width, step_height;
+    T step_width, step_height;
     if (step_w == 0 || step_h == 0) {
-      step_width = static_cast<float>(img_width) / layer_width;
-      step_height = static_cast<float>(img_height) / layer_height;
+      step_width = static_cast<T>(img_width) / layer_width;
+      step_height = static_cast<T>(img_height) / layer_height;
     } else {
       step_width = step_w;
       step_height = step_h;
@@ -100,9 +100,9 @@ class PriorBoxOpKernel : public framework::OpKernel<T> {
     auto e_boxes = framework::EigenTensor<T, 4>::From(*boxes);
     for (int h = 0; h < layer_height; ++h) {
       for (int w = 0; w < layer_width; ++w) {
-        float center_x = (w + offset) * step_width;
-        float center_y = (h + offset) * step_height;
-        float box_width, box_height;
+        T center_x = (w + offset) * step_width;
+        T center_y = (h + offset) * step_height;
+        T box_width, box_height;
         int idx = 0;
         for (size_t s = 0; s < min_sizes.size(); ++s) {
           int min_size = min_sizes[s];

python/paddle/v2/fluid/tests/test_prior_box_op.py

+#   Copyright (c) 2018 PaddlePaddle Authors. All Rights Reserve.
+#
+# 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.
+
 import unittest
 import numpy as np
 import sys
@@ -86,44 +100,26 @@ class TestPriorBoxOp(OpTest):
         idx = 0
         for h in range(self.layer_h):
             for w in range(self.layer_w):
-                center_x = (w + self.offset) * self.step_w
-                center_y = (h + self.offset) * self.step_h
+                c_x = (w + self.offset) * self.step_w
+                c_y = (h + self.offset) * self.step_h
                 idx = 0
                 for s in range(len(self.min_sizes)):
                     min_size = self.min_sizes[s]
-                    # first prior: aspect_ratio = 1, size = min_size
-                    box_width = box_height = min_size
-                    # xmin
-                    out_boxes[h, w, idx, 0] = (
-                        center_x - box_width / 2.) / self.image_w
-                    # ymin
-                    out_boxes[h, w, idx, 1] = (
-                        center_y - box_height / 2.) / self.image_h
-                    # xmax
-                    out_boxes[h, w, idx, 2] = (
-                        center_x + box_width / 2.) / self.image_w
-                    # ymax
-                    out_boxes[h, w, idx, 3] = (
-                        center_y + box_height / 2.) / self.image_h
+                    c_w = c_h = min_size / 2.
+                    out_boxes[h, w, idx, :] = [
+                        (c_x - c_w) / self.image_w, (c_y - c_h) / self.image_h,
+                        (c_x + c_w) / self.image_w, (c_y + c_h) / self.image_h
+                    ]
                     idx += 1
 
                     if len(self.max_sizes) > 0:
                         max_size = self.max_sizes[s]
                         # second prior: aspect_ratio = 1,
-                        # size = sqrt(min_size * max_size)
-                        box_width = box_height = math.sqrt(min_size * max_size)
-                        # xmin
-                        out_boxes[h, w, idx, 0] = (
-                            center_x - box_width / 2.) / self.image_w
-                        # ymin
-                        out_boxes[h, w, idx, 1] = (
-                            center_y - box_height / 2.) / self.image_h
-                        # xmax
-                        out_boxes[h, w, idx, 2] = (
-                            center_x + box_width / 2.) / self.image_w
-                        # ymax
-                        out_boxes[h, w, idx, 3] = (
-                            center_y + box_height / 2.) / self.image_h
+                        c_w = c_h = math.sqrt(min_size * max_size) / 2
+                        out_boxes[h, w, idx, :] = [(c_x - c_w) / self.image_w,
+                                                   (c_y - c_h) / self.image_h,
+                                                   (c_x + c_w) / self.image_w,
+                                                   (c_y + c_h) / self.image_h]
                         idx += 1
 
                     # rest of priors
@@ -131,20 +127,12 @@ class TestPriorBoxOp(OpTest):
                         ar = self.real_aspect_ratios[r]
                         if math.fabs(ar - 1.) < 1e-6:
                             continue
-                        box_width = min_size * math.sqrt(ar)
-                        box_height = min_size / math.sqrt(ar)
-                        # xmin
-                        out_boxes[h, w, idx, 0] = (
-                            center_x - box_width / 2.) / self.image_w
-                        # ymin
-                        out_boxes[h, w, idx, 1] = (
-                            center_y - box_height / 2.) / self.image_h
-                        # xmax
-                        out_boxes[h, w, idx, 2] = (
-                            center_x + box_width / 2.) / self.image_w
-                        # ymax
-                        out_boxes[h, w, idx, 3] = (
-                            center_y + box_height / 2.) / self.image_h
+                        c_w = min_size * math.sqrt(ar) / 2
+                        c_h = (min_size / math.sqrt(ar)) / 2
+                        out_boxes[h, w, idx, :] = [(c_x - c_w) / self.image_w,
+                                                   (c_y - c_h) / self.image_h,
+                                                   (c_x + c_w) / self.image_w,
+                                                   (c_y + c_h) / self.image_h]
                         idx += 1
         # clip the prior's coordidate such that it is within[0, 1]
         if self.clip: