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https://github.com/fortierq/mtgscan

Recognition of Magic cards on images. Detection with OCR.
https://github.com/fortierq/mtgscan

card computer-vision deck detect magic magic-the-gathering mtg ocr recognition scan scanner screenshot vision

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Recognition of Magic cards on images. Detection with OCR.

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README

          

# MTGScan
[![License: MIT](https://img.shields.io/badge/License-MIT-green.svg)](https://opensource.org/licenses/MIT)
[![CodeFactor](https://www.codefactor.io/repository/github/fortierq/mtgscan/badge)](https://www.codefactor.io/repository/github/fortierq/mtgscan)

![mtgscan](https://user-images.githubusercontent.com/49362475/102022934-448ffb80-3d8a-11eb-8948-3a10d190162a.jpg)

MTGScan uses OCR recognition to list Magic cards from an image.
After OCR, cards are looked up in a dictionnary provided by [MTGJSON](https://mtgjson.com), using fuzzy search with [SymSpell](https://github.com/wolfgarbe/SymSpell).

## [Try the Web App](http://mtgscan.net) (DOWN for now)
```mermaid
flowchart LR;
subgraph "Browser"
C1[Client];
C2[Client];
C3[Client];
end
subgraph "Frontend"
F((Flask Server));
end
subgraph "Backend"
W1[Celery Worker
using mtgscan];
W2[Celery Worker
using mtgscan];
end
subgraph "Cloud"
A[Azure Read OCR];
end
C1 <-->|Socket.IO| F;
C2 <-->|Socket.IO| F;
C3 <-->|Socket.IO| F;
F <-->|RedisMQ| W1;
F <-->|RedisMQ| W2;
W1 <-->|API| A;
W2 <-->|API| A;
```
[Repository for the web app](https://github.com/fortierq/mtgscan-app)

## Prerequisites

- Python >= 3.7
- (Recommended) Poetry
- Credentials for the required OCR (e.g Azure Computer Vision Read API)

## Installation

### ... with Poetry

```python
poetry install
```

### ... with pip

```console
pip install mtgscan
```

### ... with docker

See https://github.com/fortierq/mtgscan-app

## OCR

Currently, only Azure OCR is supported. To add an OCR, inherit mtgscan.ocr.OCR.

### Azure

API subscription key and endpoint must be stored in environment variables `AZURE_VISION_KEY` and `AZURE_VISION_ENDPOINT` respectively.
Steps:
- Subscribre for a free Azure account: https://azure.microsoft.com/free/cognitive-services
- Create a Computer Vision resource: https://portal.azure.com/#create/Microsoft.CognitiveServicesComputerVision
- Get your key and endpoint

## Tests

Every test case is stored in a separated folder in tests/samples/ containing:
- image.*: image of Magic cards
- deck.txt: decklist of the cards on the image

To run every test:
```python
poetry run python tests/test.py
```

This produces the following outputs, for each sample and OCR:
- statistics about number of cards found, number of errors...
- test.log: informations about the run
- errors.txt: history of the number of errors made by the OCR
- box_texts.txt: output of the OCR

## Example

[This example](./example.py) scans the following screenshot:
![Screenshot](https://user-images.githubusercontent.com/49362475/105632710-fa07a180-5e54-11eb-91bb-c4710ef8168f.jpeg)

```
$ poetry run python example.py

Loading https://mtgjson.com/api/v5/VintageAtomic.json
Loaded all_cards.txt: 23253 cards
Loading https://mtgjson.com/api/v5/Keywords.json
Loaded Keywords.json: 282 keywords
4 Ancient Tomb
4 Mishra's Factory
4 Mishra's Workshop
1 Strip Mine
1 Tolarian Academy
4 Wasteland
1 Sacrifice
1 Mox Ruby
1 Mox Emerald
1 Mox Jet
1 Mox Pearl
1 Mox Sapphire
1 Black Lotus
1 Mana Crypt
1 Sol Ring
4 Phyrexian Revoker
4 Arcbound Ravager
1 Thorn of Amethyst
4 Sphere of Resistance
4 Foundry Inspector
3 Chief of the Foundry
1 Trinisphere
1 Lodestone Golem
1 Mystic Forge
2 Fleetwheel Cruiser
1 Traxos, Scourge of Kroog
4 Walking Ballista
3 Stonecoil Serpent
1 Chalice of the Void

3 Mindbreak Trap
4 Leyline of the Void
2 Crucible of Worlds
4 Pithing Needle
2 Wurmcoil Engine
```