# witzit - What In The Zap Is That?
`witzit` --- What In The Zap Is That?
AI categorization of spectra from LIBS/XRF analyzers.

Example Jupyter plot from SciAps X-555 XRF:

![xrf-spectrum-sciaps](notebooks/xrf-spectrum.png)

Example plot from Olympus Vanta XRF:
![xrf-spectrum-vanta](notebooks/xrf-spectrum-vanta.png)


# Install
## Install Dependencies
Get system dependency and upgrade Python pip.
Perhaps do something like this, or set up a Python virtual environment.

```
sudo apt update
sudo apt install git python3-pip python3-virtualenv
```


## pysalx
The `pysalx` repo contains scripts for interacting with the device.
Install that too.

```
git clone https://spacecruft.org/spacecruft/pysalx.git
cd pysalx/
# Set the date
./scripts/pysalx-date-set
# whatever else...
..
```

## Clone Git Repo
Get source code with `git`.

The default `requirements.txt` installs a Tensorflow without
GPU support. You can edit the `requirements.txt` file to change
which is supported. The "generic" version supports both.
XXX tensorflow not available in pip 2023-01.

## Setup
Thusly.

```
git clone https://spacecruft.org/spacecruft/witzit
cd witzit/
virtualenv -p python3 env
source env/bin/activate
pip install --upgrade pip
pip install -r requirements.txt
deactivate
```


# witzit scripts

* `witzit-load` --- Load and text display data from SciAps or Olympus XRF.
* `witzit-plot` --- Plot a sample from a SciAps X-555 or Olympus Vanta-M.
* `witzit-plot2png` --- Plot a sample from a SciAps X-555 or Olympus Vanta-M
    and save to PNG.

Development is most easily done under Jupyter with Tensorboard
for training models. These files are in the `notebooks/` directory.

* `witzit-plot.ipynb` --- witzit Jupyter notebook, plotting application for
    SciAps X-555 or Olympus Vanta-M.
* `witzit-predict.ipynb` --- witzit Jupyter notebook, prediction application.
* `witzit-train.ipynb` --- witzit Jupyter notebook, training application.

# Data
Note: Files in the `data/` directory may be deleted and/or manipulated
by scripts in this application.

Note well, the `data/` directory is ignored by git, and is a temporary
directory where data to be processed is stored. For example, if you have
a main original archive of 10,000 samples and you want to process just 1,000
of them, they would be copied to the `data/` directory.


Data is also stored here, which can also be deleted/moved by scripts:

`/srv/witzit/`


Each element sample will be stored under here:

`/srv/witzit/data/element/`


Each element model will be stored under here:

`/srv/witzit/data/models/`


Temporary logs during training may be written to the gitignored
`logs/` directory.


# Usage
HOWTO USE. Getting closer...

```
# Example:
debian@workstation:~/spacecruft/witzit$ ./witzit-load-x555
       energy (eV)   2048
0        20.590676      0
1        45.021816      0
2        69.452957      0
3        93.884097      0
...
1023  25013.647367    175
1024  25038.078508    173
1025  25062.509648    155
1026  25086.940789    193
...
2047  50031.135199      1
```

## Jupyter Notebooks

Run jupyter thusly:

```
cd witzit/notebooks
jupyter-lab
```

# Hardware

* SciAps LIBS Analyzer

* SciAps XRF Analyzer

* Olympus XRF Analyzer


# Deep Learning Algorithm
Can use lots from `wut`.

* https://spacecruft.org/spacecruft/satnogs-wut/src/branch/master/wut-worker-mas.py#L67-L79

```
def uncompiled_model():
  model = Sequential([
    Conv2D(16, 3, padding='same', activation='relu', input_shape=(IMG_HEIGHT, IMG_WIDTH ,3)),
    MaxPooling2D(),
    Conv2D(32, 3, padding='same', activation='relu'),
    MaxPooling2D(),
    Conv2D(64, 3, padding='same', activation='relu'),
    MaxPooling2D(),
    Flatten(),
    Dense(512, activation='relu'),
    Dense(1, activation='sigmoid')
  ])
  return model
```


Amazingly (to me), the paper
*Classification of radioxenon spectra with deep learning algorithm*
(2021) by Azimi, et al. uses nearly the identical CNN `Sequence()` as
`wut` uses, indicating it may be a very good base to start from.

Paper is non-gratis science:

* https://www.sciencedirect.com/science/article/abs/pii/S0265931X21001909


The `Sequence()` diagram is pulled from the Azimi paper, but is the
same as in `wut`, so makes a good reference.


![Deep Learning Sequence](img/sequence.png)


# Articles:

* https://www.sciencedirect.com/science/article/abs/pii/S0265931X21001909
*Classification of radioxenon spectra with deep learning algorithm*

* https://www.sciencedirect.com/science/article/pii/S0030401822000402
*Deep convolutional neural networks as a unified solution for Raman spectroscopy-based classification in biomedical applications*

* https://www.sciencedirect.com/science/article/abs/pii/S058485472030313X
*Automatic preprocessing of laser-induced breakdown spectra using partial least squares regression and feed-forward artificial neural network: Applications to Earth and Mars data*

* https://www.sciencedirect.com/science/article/abs/pii/S0584854719306068 
*Determination of minor metal elements in steel using laser-induced breakdown spectroscopy combined with machine learning algorithms*

* https://www.sciencedirect.com/science/article/abs/pii/S1386142521009380
*Feature selection of infrared spectra analysis with convolutional neural network*

# Development
Setup like above, and also:

```
cd witzit/
source env/bin/activate
pip install -r requirements-dev.txt
```

Then before committing new code, make sure it is enprettified:

```
black foo.py
```


# See Also

* `pysalx` --- Unofficial scripts for interacting with the SciAps LIBS
  and XRF analyzers.

https://spacecruft.org/spacecruft/pysalx/

* `wut?` --- *What U Think?* SatNOGS Observation AI.

https://spacecruft.org/spacecruft/satnogs-wut/


# Status
Alpha software under development.
Need to check:

* *API: 501 Not Implemented*
 https://spacecruft.org/spacecruft/pysalx/issues/2


# Unofficial
Unofficial, unaffiliated with SciAps or Olympus.


# License
License: GPLv3 or any later version. 

*Copyright © 2019-2023, Jeff Moe.*