Hi @khanhlvg
Thanks for your tutorials and colab notebook.
Since I was experimenting with using your android_figurine tflite model in a browser, I extracted it as SAVED_MODEL as shown below.

Because ExportFormat.TFJS is not allowed for object detection model yet…
I’ve tried to use this flow: Model maker → SAVED_MODEL → TFJS


Step1: Model maker → SAVED_MODEL (Success)
// model.export(export_dir='.', tflite_filename='android.tflite') // original code

model.export(export_dir="/js_export/", export_format=[ExportFormat.SAVED_MODEL])
!zip -r /js_export/ModelFiles.zip /js_export/


Step 2 SAVED_MODEL → TFJS (Failed)

스크린샷 2022-01-03 오후 5.33.031920×1093 212 KB

Error log
Traceback (most recent call last):
  File "/Users/judepark/Sites/TensorFlow/.direnv/python-3.6.8/lib/python3.6/site-packages/tensorflowjs/converters/wizard.py", line 619, in run
    converter.convert(arguments)
  File "/Users/judepark/Sites/TensorFlow/.direnv/python-3.6.8/lib/python3.6/site-packages/tensorflowjs/converters/converter.py", line 804, in convert
    weight_shard_size_bytes, metadata_map)
  File "/Users/judepark/Sites/TensorFlow/.direnv/python-3.6.8/lib/python3.6/site-packages/tensorflowjs/converters/converter.py", line 533, in _dispatch_converter
    metadata=metadata_map)
  File "/Users/judepark/Sites/TensorFlow/.direnv/python-3.6.8/lib/python3.6/site-packages/tensorflowjs/converters/tf_saved_model_conversion_v2.py", line 771, in convert_tf_saved_model
    metadata=metadata)
  File "/Users/judepark/Sites/TensorFlow/.direnv/python-3.6.8/lib/python3.6/site-packages/tensorflowjs/converters/tf_saved_model_conversion_v2.py", line 724, in _convert_tf_saved_model
    metadata=metadata)
  File "/Users/judepark/Sites/TensorFlow/.direnv/python-3.6.8/lib/python3.6/site-packages/tensorflowjs/converters/tf_saved_model_conversion_v2.py", line 157, in optimize_graph
    ', '.join(unsupported))
ValueError: Unsupported Ops in the model before optimization
TensorListConcatV2