Sprites Detection

A sprite is a small raster graphic (a bitmap) that represents an object such as a character, a vehicle, a projectile, etc.

Sprite Sheet

It is not uncommon for games to have tens to hundreds of sprites. Loading each of these as an individual image would consume a lot of memory and processing power. To help manage sprites and avoid using so many images, many games use sprite sheets (also known as image sprites).

A sprite sheet consists of multiple sprites in one image. In other words, sprite sheets pack multiple sprites into a single picture. Using sprite sheet, video game developers create sprite sheet animation representing one or several animation sequences while only loading a single file:

Sprite Bounding Box

A frame (bounding box) can be used to delimit the sprite in the sprite sheet. This bounding box is defined with two 2D points top_left and the bottom_right, which their respective coordinates x and y are relative to the top-left corner of the sprite sheet's image.

Sprite Mask

The mask of a sprite defines the 2D shape of the sprite.

Aim of the project

• Detect sprites packed in an image (sheet) and draw their masks and bounding boxes into a new image with the same size of the original image.
  
• Present a 2D map of all the the sprites with their labels.
  

Installation

• pipenv install spriteutil_detection

Features

Find sprites

• For example:
  

>>> from spriteutil_detection import SpriteSheet
>>> sprite_sheet = SpriteSheet('Barbarian.gif')
>>> sprites, labels = sprite_sheet.find_sprites()
>>> len(sprites)
39

Create sprites' masks and bouding boxes

• For example:
  

>>> from spriteutil_detection import SpriteSheet
>>> sprite_sheet = SpriteSheet('Barbarian.gif')
>>> # Create the mask image with bounding boxes.
>>> image = sprite_sheet.create_sprite_labels_image()
>>> image.save('barbarian_bounding_boxes.png')

Contact Information

• If you have any problems using this library, please use the contact below.
  Email: duy.phung@f4.intek.edu.vn
Phone: (+84) 934 611 103