#Classify images with Origami Studio 3 + TensorFlow lite

• You can install this repo anywhere on your computer.
• For this tutorial I recommend you follow exactly the steps below and install it in your Documents directory.
• You can simply copy-paste the code snippets into you terminal.

#1. Download and install Origami Studio 3.

#2. Open a terminal window:

Just press command + space , search for terminal.app and hit return.

#3. Download example code:

git clone https://git.sr.ht/~jochen/Origami-Classify ~/Documents/Origami-Classify

This creates a folder named Origami-Classify and downloads the following files into it:

• classify.origami
• classify.py
• README.md
• LICENSE

#4. Install virtualenv:

pip3 install virtualenv

#5. Change directory to your Documents folder.

cd ~/Documents

#6. Create virtual environment:

virtualenv -p python3 OS-classify

Thist will create a new folder in your Documents folder named OS-classify. You can choose another name, but in this tutorial we'll use OS-classify

#7. Change directory to virtual environment:

cd OS-classify

#8. Activate virtual environment:

source bin/activate

#9. Move example code into your virtual environment folder:

cp ~/Documents/Origami-Classify/* ~/Documents/OS-classify/

This will copy all the files from the Origami-Classify folder to your OS-classify project folder.

#10. Install Flask:

pip3 install Flask

#11. Install PIL:

pip3 install Pillow

#12. Install Numpy:

pip3 install -U numpy

#13. Install TFlite:

pip3 install --index-url https://google-coral.github.io/py-repo/ tflite_runtime

#14. Test TFlite installation:

Python3
>>> from tflite_runtime.interpreter import Interpreter

• Successful installation will only print >>> on the following line. This may take a couple of seconds.
• Quit Python3 with: $ exit()

#15. Prepare your model and labels:

curl -o mobilenet_v1_1.0_224_quant_and_labels.zip 'https://storage.googleapis.com/download.tensorflow.org/models/tflite/mobilenet_v1_1.0_224_quant_and_labels.zip'
unzip mobilenet_v1_1.0_224_quant_and_labels.zip
rm mobilenet_v1_1.0_224_quant_and_labels.zip

• You use the curl command to download a .zip file which contains the pre-trained mobileNet model and it's labels.
• The unzip command extracts the .zip file into your current directory (OS-classify)
• with the rm command you delete the now unnecessary .zip file

#16. Your OS-classify folder should now contain the following files:

ls

• This command will list the contents of you OS-classify folder.
• At this point the following files should get listet in your terminal:

#17. Setup and run Flask:

export FLASK_APP=classify.py
flask run --host=0.0.0.0

#18. Copy Flask IP address:

• Flask will print multiple lines to the terminal.
• The last line shows the IP address the local Flask server is running on. (might take a couple of seconds)
• Copy this address.

#19. Open classify.origami:

• In the Patch Graph you can find a patch called "Network Request"
• Paste the copied IP address into its URL-field and append it with "message".
• Example: http://192.168.0.27:5000/message

#20. Adventure Time !!! (❍ᴥ❍ʋ)

#Training and using your own model:

• Visit teachablemachine.withgoogle.com/train/image (Standard Image Model, 224px x 224px color images)
• Create and train your own classifier model
• Export and download your model as TensorFlow Lite (Quantized)
• Unzip the downloaded file (converted_tflite_quantized.zip)
• the unzipped folder contains two files

• Put these two files into your Origami-Classify project folder
• Open classify.py in the texteditor of your choice
• Edit model_path to point to your model.tflite (line 54)
• Edit label_path to point to your labels.txt
• *Example: model_path = "model.tflite" , label_path = "labels.txt" *
• Perform step 17. to 20. again to test your own model in your Origami sketch