chore: import upstream snapshot with attribution

cpp/json_ffi/image_utils.h

@@ -0,0 +1,31 @@
+/*!
+ *  Copyright (c) 2023-2025 by Contributors
+ * \file json_ffi/image_utils.h
+ * \brief The header of Image utils for JSON FFI Engine in MLC LLM.
+ */
+#ifndef MLC_LLM_JSON_FFI_IMAGE_UTILS_H_
+#define MLC_LLM_JSON_FFI_IMAGE_UTILS_H_
+
+#include <tvm/runtime/tensor.h>
+
+#include <optional>
+#include <string>
+
+#include "../support/result.h"
+
+namespace mlc {
+namespace llm {
+namespace json_ffi {
+
+/*! \brief Load a base64 encoded image string into a CPU Tensor of shape {height, width, 3} */
+Result<tvm::runtime::Tensor> LoadImageFromBase64(const std::string& base64_str);
+
+/*! \brief Preprocess the CPU image for CLIP encoder and return an Tensor on the given device */
+tvm::runtime::Tensor ClipPreprocessor(tvm::runtime::Tensor image_data, int target_size,
+                                      DLDevice device);
+
+}  // namespace json_ffi
+}  // namespace llm
+}  // namespace mlc
+
+#endif  // MLC_LLM_JSON_FFI_IMAGE_UTILS_H_