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A simple tool for extracting sprites from full frames. Useful for AI projects.

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# spritex
A simple tool for extracting sprites from full frames. Useful for AI projects. Made using Python 3, Kivy, pillow and numpy.

## Installation

### PyPI

```pip install spritex```

After running this command ```spritex``` command should be accessible from terminal.

### For development and git cloning

There is ```install.sh``` which will create a symbolic link from "bin/spritex" to "/usr/local/bin" folder. Which enables ```spritex``` command to be executed from terminal.

### Dependencies
* numpy==1.12.1
* Kivy>=1.10.0
* pillow>=2.1.0

You can install dependencies via pip:

```pip install -r requirements.txt --upgrade```

#### Arch Linux
You can install dependencies via pacman.

```sudo pacman -S python-pillow python-kivy python-numpy```

## Usage
You can open image files through ```spritex path.png```. If you use SDL2 backend you can drag and drop image files on to application window.

### General functionality
* Toggle grid: Shows pixel grid when zoomed in. 
    * Zoom should be at least 8 screen pixels = 1 image pixel.
* Select region: Allows you to select a rectangular region in image via mouse drag and drop. 
    * After a region selected roughly, it is possible to fine tune by arrow keys. 
* Copy Region to Clipboard: Copies the selected region coordinates to clipboard in **(y1,x1,y2,x2)** format.

### Keyboard shortcuts

* Without any modifiers arrow keys will move selection around by 1 px.
* With Ctrl modifier selection will grow on bottom and right side by 1 px.
* With Alt modifier selection will grow on top and left side by 1 px.
* With shift modifier all operations will do 5px.

### Extract Operations
* Sprite: will create an image from selection into same folder of source image. 
    * *Useful at creating training data for ANN classifiers.*
* Unique colors: will extract unique colors of the selection relative to rest of the image. Output will be (unique color count)x1 image and will be saved into same folder with source. 
    * *Useful at locating simple objects that represented by unique colors from screen frame.* 
* Unique sprite: will extract an image that is same size of selection but unique colors only.
    * *Useful at locating simple objects that represented by unique colors at unique positions from screen frame.*
* Transparent sprite: will extract an transparent image from multiple images of same folder. Mismatching pixels will be discarded and transparent.
    * *Useful at extracting exact sprite. When background is animating but sprite is not moving.*

#### Overlays Functionality

Dynamically updates the selection window with selected operation. Useful for previewing the output.

### Screenshots

![Screenshot](https://github.com/codetorex/spritex/raw/screenshots/screenshot00.png?raw=true "Screenshot")

![Screenshot](https://github.com/codetorex/spritex/raw/screenshots/screenshot01.png?raw=true "Screenshot")

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