diff --git a/mace/core/tensor.h b/mace/core/tensor.h
index 47fa3d11387c258e8cc96d55b7a9cca68a94f9e0..f1acb799ca793a4a293a096b14cc46d920d4e289 100644
--- a/mace/core/tensor.h
+++ b/mace/core/tensor.h
@@ -68,17 +68,20 @@ class Tensor {
     : allocator_(alloc),
       dtype_(type),
       buffer_(nullptr),
-      is_buffer_owner_(true) {};
+      is_buffer_owner_(true),
+      name_("") {};
 
   Tensor(BufferBase *buffer, DataType dtype)
     : dtype_(dtype),
       buffer_(buffer),
-      is_buffer_owner_(false) {}
+      is_buffer_owner_(false),
+      name_("") {}
 
   Tensor(const BufferSlice &buffer_slice, DataType dtype)
     : dtype_(dtype),
       buffer_slice_(buffer_slice),
-      is_buffer_owner_(false) {
+      is_buffer_owner_(false),
+      name_("") {
     buffer_ = &buffer_slice_;
   }
 
@@ -184,8 +187,18 @@ class Tensor {
     } else {
       MACE_CHECK(has_opencl_image(), "Cannot ResizeImage buffer, use Resize.");
       Image *image = dynamic_cast<Image*>(buffer_);
-      MACE_CHECK(image_shape[0] <= image->image_shape()[0]
-                   && image_shape[1] <= image->image_shape()[1]);
+      MACE_CHECK(shape[0] <= image->image_shape()[0]
+                   && shape[1] <= image->image_shape()[1],
+                 "tensor (source op ",
+                 name_,
+                 "): current image shape: ",
+                 image->image_shape()[0],
+                 ", ",
+                 image->image_shape()[1],
+                 " < resize tensor shape: ",
+                 shape[0],
+                 ", ",
+                 shape[1]);
     }
   }
 
@@ -238,6 +251,10 @@ class Tensor {
     return buffer_;
   }
 
+  inline void SetSourceOpName(const std::string name) {
+    name_ = name;
+  }
+
   inline void DebugPrint() const {
     using namespace numerical_chars;
     std::stringstream os;
@@ -293,6 +310,7 @@ class Tensor {
   BufferBase *buffer_;
   BufferSlice buffer_slice_;
   bool is_buffer_owner_;
+  std::string name_;
 
  DISABLE_COPY_AND_ASSIGN(Tensor);
 };
diff --git a/mace/core/workspace.cc b/mace/core/workspace.cc
index a7adb9395a4119cd9858bfdb7cc293149251e97a..59c509e71f672361d8d3643f3c41424ee3480131 100644
--- a/mace/core/workspace.cc
+++ b/mace/core/workspace.cc
@@ -143,6 +143,12 @@ void Workspace::CreateImageOutputTensor(const NetDef &net_def) {
     if (op.has_mem_id()) {
       std::unique_ptr<Tensor> tensor
         (new Tensor(preallocated_allocator_.GetBuffer(op.mem_id()), dtype));
+      tensor->SetSourceOpName(op.name());
+      VLOG(3) << "Tensor: " << op.name() << "(" << op.type() << ")" << "; Mem: "
+              << op.mem_id() << "; Image shape: "
+              << dynamic_cast<Image *>(tensor->UnderlyingBuffer())->image_shape()[0]
+              << ", "
+              << dynamic_cast<Image *>(tensor->UnderlyingBuffer())->image_shape()[1];
       tensor_map_[op.output(0)] = std::move(tensor);
     }
   }