# Testing Images

This archive contains image datasets collected during early testing and validation of the imaging workflow used for colour-based sample analysis. The files are organised by test type and contain JPG images captured at 1920 × 1080 resolution.

The archive is intended to preserve the raw test images used to assess camera positioning, background effects, bleach dilution response, and dye sample colour response.

## Archive contents

```text
Testing Images/
├── Bleach Tests/
│   ├── 12.5 %/
│   ├── 25 %/
│   ├── 50 %/
│   └── 100 %/
├── Camera Locations/
├── Dye Samples/
│   ├── 0.01/
│   ├── 0.02/
│   ├── ...
│   ├── 0.9/
│   └── 1/
└── Tests With Black Background/
    ├── 1 mL B/
    ├── 2 mL B/
    ├── 3 mL B/
    ├── 4 mL B/
    └── 5 mL B/
```

## Dataset summary

| Folder | Number of JPG images | Description |
|---|---:|---|
| `Bleach Tests/` | 72 | Images of bleach dilution tests at 12.5 %, 25 %, 50 %, and 100 %. Each concentration contains images labelled by sample group, time point, and replicate. |
| `Camera Locations/` | 6 | Images used to document or compare different camera positions during imaging setup development. |
| `Dye Samples/` | 60 | Images of dye standards or dye dilution samples across a concentration range from 0.01 to 1. |
| `Tests With Black Background/` | 30 | Images used to assess the effect of a black background on sample imaging, including vial/volume conditions labelled from 1 mL B to 5 mL B. |

Total usable image files: **168 JPG images**.

## File naming notes

### Bleach tests

Bleach test files generally follow this pattern:

```text
<concentration> <sample group> <time point> (<replicate>).jpg
```

Example:

```text
100 % A 15 (2).jpg
```

This indicates a 100 % bleach sample, sample group `A`, time point `15`, replicate image `2`.

### Dye samples

Dye sample folders are named by concentration or dilution level, for example:

```text
0.01/
0.1/
0.5/
1/
```

Each folder contains replicate images with simple letter-based filenames such as `S.jpg`, `S1.jpg`, and `S2.jpg`.

### Black background tests

The black background tests are grouped by labelled sample volume/condition:

```text
1 mL B/
2 mL B/
3 mL B/
4 mL B/
5 mL B/
```
```

## Suggested use

These images can be used to:

- test image analysis scripts before applying them to experimental datasets;
- assess the influence of background colour on extracted RGB, greyscale, or CIELAB values;
- compare camera positioning and lighting conditions;
- validate whether colour-based analysis can detect systematic changes across dilution or concentration series;
- provide example images for documenting the development of the imaging station.



