MLECO-2873: Object detection usecase follow-up

Change-Id: Ic14e93a50fb7b3f3cfd9497bac1280794cc0fc15
Signed-off-by: Isabella Gottardi <isabella.gottardi@arm.com>
diff --git a/source/use_case/vww/include/VisualWakeWordModel.hpp b/source/use_case/vww/include/VisualWakeWordModel.hpp
index ee3a7bf..1ed9202 100644
--- a/source/use_case/vww/include/VisualWakeWordModel.hpp
+++ b/source/use_case/vww/include/VisualWakeWordModel.hpp
@@ -1,5 +1,5 @@
 /*
- * Copyright (c) 2021 Arm Limited. All rights reserved.
+ * Copyright (c) 2021 - 2022 Arm Limited. All rights reserved.
  * SPDX-License-Identifier: Apache-2.0
  *
  * Licensed under the Apache License, Version 2.0 (the "License");
@@ -24,6 +24,12 @@
 
     class VisualWakeWordModel : public Model {
 
+    public:
+        /* Indices for the expected model - based on input tensor shape */
+        static constexpr uint32_t ms_inputRowsIdx     = 1;
+        static constexpr uint32_t ms_inputColsIdx     = 2;
+        static constexpr uint32_t ms_inputChannelsIdx = 3;
+
     protected:
         /** @brief   Gets the reference to op resolver interface class. */
         const tflite::MicroOpResolver& GetOpResolver() override;