diff --git a/shared/api/c_api_processor.cc b/shared/api/c_api_processor.cc
index 6340a78dc..de8f5f196 100644
--- a/shared/api/c_api_processor.cc
+++ b/shared/api/c_api_processor.cc
@@ -3,6 +3,7 @@
 
 #include "ortx_processor.h"
 #include "image_processor.h"
+#include <iostream>
 
 #include "c_api_utils.hpp"
 
@@ -89,8 +90,10 @@ extError_t ORTX_API_CALL OrtxImagePreProcess(OrtxProcessor* processor, OrtxRawIm
   }
 
   auto result_ptr = std::make_unique<TensorResult>();
+  std::cout << "OrtxImagePreProcess: num_images=" << images_ptr->num_images << std::endl;
   status =
       processor_ptr->PreProcess(ort_extensions::span(images_ptr->images.get(), images_ptr->num_images), *result_ptr);
+  std::cout << "OrtxImagePreProcess: Finish PreProcess" << std::endl;
   if (status.IsOk()) {
     *result = static_cast<OrtxTensorResult*>(result_ptr.release());
   } else {
diff --git a/shared/api/image_processor.cc b/shared/api/image_processor.cc
index c7eecfd19..aff7bece3 100644
--- a/shared/api/image_processor.cc
+++ b/shared/api/image_processor.cc
@@ -2,6 +2,7 @@
 // Licensed under the MIT License.
 
 #include <string_view>
+#include <iostream>
 
 #include "nlohmann/json.hpp"
 #include "file_sys.h"
@@ -154,21 +155,26 @@ ImageProcessor::PreProcess(ort_extensions::span<ImageRawData> image_data,
 OrtxStatus ImageProcessor::PreProcess(ort_extensions::span<ImageRawData> image_data, TensorResult& r) const {
   std::vector<TensorArgs> inputs(image_data.size());
   std::vector<TensorPtr> input_tensor_objects(image_data.size());
+  std::cout << "ImageProcessor::PreProcess image_data size=" << image_data.size() << std::endl;
   for (size_t i = 0; i < image_data.size(); ++i) {
     auto& ts_input = inputs[i];
     ImageRawData& image = image_data[i];
     std::vector<int64_t> shape = {static_cast<int64_t>(image.size())};
+    for (int n : shape) {
+        std::cout << n << ",";
+    }
+    std::cout << std::endl;
     input_tensor_objects[i] = std::make_unique<ortc::Tensor<uint8_t>>(shape, image.data());
     ts_input.push_back(input_tensor_objects[i].get());
   }
-
+  std::cout << "ImageProcessor::PreProcess Finish loop" << std::endl;
   std::vector<TensorArgs> outputs;
   OrtxRunner runner(op_plan_);
   auto status = runner.Run(inputs, outputs);
   if (!status.IsOk()) {
     return status;
   }
-
+  std::cout << "ImageProcessor::PreProcess Finish Push" << std::endl;
   // clear the input tensors
   input_tensor_objects.clear();
 
@@ -182,6 +188,7 @@ OrtxStatus ImageProcessor::PreProcess(ort_extensions::span<ImageRawData> image_d
   if (status.IsOk()) {
     r.SetTensors(std::move(img_result));
   }
+  std::cout << "ImageProcessor::PreProcess Finish" << std::endl;
 
   return status;
 }