VSCode_T Utilities

This workspace contains two small Python utilities:

• Imagel.py: thermal model of a spherical microparticle under beam heating with radiative cooling.
• Retrieval.py: extract frames from a video and save cropped images.

Requirements

Install dependencies (preferably in a virtual environment):

numpy
scipy
matplotlib
opencv-python

You can also install from requirements.txt.

Usage

Imagel (defaults match the original script):

python Imagel.py --t-end 0.005 --t-steps 500 --output heat_20241127.jpg --xlim 0.0005

Retrieval (defaults match the original script):

python Retrieval.py --video 300kV_50nA.mp4 --outdir data_300kV_50nA --x 564 --y 200 --w 638 --h 578

Optional flags for Retrieval:

• --start: start frame index (default 0)
• --max-frames: limit number of frames to write (-1 for all)

Notes

• ROI in Retrieval.py is clipped to the frame bounds to avoid errors.
• Imagel.py implements a forward-Euler integrator; adjust parameters as needed.