add image consistent

visualdl/logic/im.cc

@@ -37,7 +37,7 @@ template class SimpleWriteSyncGuard<Entry<double>>;
 template class SimpleWriteSyncGuard<Entry<bool>>;
 template class SimpleWriteSyncGuard<Entry<long>>;
 template class SimpleWriteSyncGuard<Entry<std::string>>;
-template class SimpleWriteSyncGuard<Entry<std::vector<char>>>;
+template class SimpleWriteSyncGuard<Entry<std::vector<byte_t>>>;
 template class SimpleWriteSyncGuard<Entry<int>>;
 
 }  // namespace visualdl

visualdl/logic/pybind.cc

@@ -93,7 +93,10 @@ PYBIND11_PLUGIN(core) {
 
   py::class_<cp::ImageReader::ImageRecord>(m, "ImageRecord")
       // TODO(ChunweiYan) make these copyless.
-      .def("data", [](cp::ImageReader::ImageRecord& self) { return self.data; })
+      .def("data",
+           [](cp::ImageReader::ImageRecord& self) {
+             return self.data;
+           })
       .def("shape",
            [](cp::ImageReader::ImageRecord& self) { return self.shape; })
       .def("step_id",

visualdl/logic/sdk.cc

@@ -113,13 +113,13 @@ void Image::SetSample(int index,
   CHECK_LT(index, num_samples_);
   CHECK_LE(index, num_records_);
 
-  auto entry = step_.MutableData<std::vector<char>>(index);
+  auto entry = step_.MutableData<std::vector<byte_t>>(index);
   // trick to store int8 to protobuf
-  std::vector<char> data_str(data.size());
+  std::vector<byte_t> data_str(data.size());
   for (int i = 0; i < data.size(); i++) {
     data_str[i] = data[i];
   }
-  entry.Set(data_str);
+  entry.SetRaw(std::string(data_str.begin(), data_str.end()));
 
   static_assert(
       !is_same_type<value_t, shape_t>::value,
@@ -145,13 +145,13 @@ std::string ImageReader::caption() {
 ImageReader::ImageRecord ImageReader::record(int offset, int index) {
   ImageRecord res;
   auto record = reader_.record(offset);
-  auto data_entry = record.data<std::vector<char>>(index);
+  auto data_entry = record.data<std::vector<byte_t>>(index);
   auto shape_entry = record.data<shape_t>(index);
-  auto data_str = data_entry.Get();
+  auto data_str = data_entry.GetRaw();
   std::transform(data_str.begin(),
                  data_str.end(),
                  std::back_inserter(res.data),
-                 [](char i) { return (int)((unsigned char)i); });
+                 [](byte_t i) { return (int)(i); });
   res.shape = shape_entry.GetMulti();
   res.step_id = record.id();
   return res;

visualdl/python/test_storage.py

 import random
 import time
 import unittest
+from PIL import Image
 
 import numpy as np
 
@@ -62,6 +63,46 @@ class StorageTest(unittest.TestCase):
         self.assertTrue(image_tags)
         self.assertEqual(len(image_tags), 1)
 
+    def test_check_image(self):
+        '''
+        check whether the storage will keep image data consistent
+        '''
+        print 'check image'
+        tag = "layer1/check/image1"
+        image_writer = self.writer.image(tag, 10, 1)
+
+        image = Image.open("./dog.jpg")
+        shape = [image.size[1], image.size[0], 3]
+        origin_data = np.array(image.getdata()).flatten()
+
+        self.reader = storage.StorageReader(self.dir).as_mode("train")
+
+        image_writer.start_sampling()
+        index = image_writer.is_sample_taken()
+        image_writer.set_sample(index, shape, list(origin_data))
+        image_writer.finish_sampling()
+
+        # read and check whether the original image will be displayed
+
+        image_reader = self.reader.image(tag)
+        image_record = image_reader.record(0, 0)
+        data = image_record.data()
+        shape = image_record.shape()
+
+        PIL_image_shape = (shape[0]*shape[1], shape[2])
+        data = np.array(data, dtype='uint8').reshape(PIL_image_shape)
+        print 'origin', origin_data.flatten()
+        print 'data', data.flatten()
+        image = Image.fromarray(data.reshape(shape))
+
+        self.assertTrue(np.equal(origin_data.reshape(PIL_image_shape), data).all())
+
+
+
+
+
+
+
 
 if __name__ == '__main__':
     unittest.main()

visualdl/storage/entry.cc

@@ -22,14 +22,14 @@ namespace visualdl {
   }
 
 template <>
-void Entry<std::vector<char>>::Set(std::vector<char> v) {
+void Entry<std::vector<byte_t>>::Set(std::vector<byte_t> v) {
   entry->set_dtype(storage::DataType::kBytes);
   entry->set_y(std::string(v.begin(), v.end()));
   WRITE_GUARD
 }
 
 template <>
-void Entry<std::vector<char>>::Add(std::vector<char> v) {
+void Entry<std::vector<byte_t>>::Add(std::vector<byte_t> v) {
   entry->set_dtype(storage::DataType::kBytess);
   *entry->add_ys() = std::string(v.begin(), v.end());
   WRITE_GUARD
@@ -68,9 +68,9 @@ IMPL_ENTRY_GET(std::string, s);
 IMPL_ENTRY_GET(bool, b);
 
 template <>
-std::vector<char> EntryReader<std::vector<char>>::Get() const {
+std::vector<uint8_t> EntryReader<std::vector<byte_t>>::Get() const {
   const auto& y = data_.y();
-  return std::vector<char>(y.begin(), y.end());
+  return std::vector<byte_t>(y.begin(), y.end());
 }
 
 #define IMPL_ENTRY_GET_MULTI(T, fieldname__)           \
@@ -91,12 +91,12 @@ template class Entry<int>;
 template class Entry<float>;
 template class Entry<double>;
 template class Entry<bool>;
-template class Entry<std::vector<char>>;
+template class Entry<std::vector<byte_t>>;
 
 template class EntryReader<int>;
 template class EntryReader<float>;
 template class EntryReader<double>;
 template class EntryReader<bool>;
-template class EntryReader<std::vector<char>>;
+template class EntryReader<std::vector<byte_t>>;
 
 }  // namespace visualdl

visualdl/storage/entry.h

@@ -9,6 +9,8 @@ namespace visualdl {
 
 struct Storage;
 
+using byte_t = unsigned char;
+
 /*
  * Utility helper for storage::Entry.
  */
@@ -30,6 +32,8 @@ struct Entry {
   // Set a single value.
   void Set(T v);
 
+  void SetRaw(const std::string& bytes) { entry->set_y(bytes); }
+
   // Add a value to repeated message field.
   void Add(T v);
 
@@ -50,6 +54,8 @@ struct EntryReader {
   // Get repeated field.
   std::vector<T> GetMulti() const;
 
+  std::string GetRaw() { return data_.y(); }
+
 private:
   storage::Entry data_;
 };