Pixel Master

App Overview
Pixel Master is a feature-rich Android application designed for creating retro-style pixel art from photos. The app transforms modern images into nostalgic 8-bit style graphics reminiscent of classic computing systems and vintage video games. With an intuitive interface and powerful image processing capabilities, Pixel Master offers both casual users and pixel art enthusiasts a simple way to create retro-styled digital art.
Technical Specifications

Platform: Android
Framework: Modern Jetpack Compose UI
Design System: Material 3
Architecture: Component-based with clean separation of UI and processing logic
Languages: Kotlin
Minimum SDK: Compatible with modern Android versions
Processing: Asynchronous image processing with coroutines

Key Features
1. Image Selection and Manipulation

Gallery integration for easy image selection
Real-time image preview
Ability to toggle between original and processed images for comparison
Support for various image formats

2. Dual Filter System

Pixelation Filter: Basic pixelation effect with adjustable pixel block size (1-100)
8-Bit Retro Filter: Advanced filter combining pixelation with color palette reduction

3. Authentic Retro Palettes
Five carefully recreated classic computing color palettes:

ZX Spectrum Dim: Original 8-color palette from the ZX Spectrum
ZX Spectrum Bright: High-intensity version of the Spectrum palette
VIC-20: 16-color palette from the Commodore VIC-20
C-64: 16-color palette from the Commodore 64
Apple II: 16-color palette from the Apple II

4. Advanced Processing Controls

Adjustable pixel size for precise control over the pixelation effect
Collapsible filter options panel for a cleaner interface
Real-time progress indicator with percentage display

5. Export Functionality

One-touch saving to device gallery
Automatic naming with timestamps
PNG format preservation with transparency support
Compatibility with Android's content provider system

User Interface
Main Screen (PixelArtScreen)

Top Bar: App title with settings access
Filter Selection Area: Toggle between Pixelation and 8-Bit Retro modes
Filter Controls: Sliders and palette selection based on chosen filter
Image Display: Central area showing current image with filter type indicator
Action Buttons: Compare (toggle between original/processed), Select (image picker), and Save

Settings Screen

Simple settings interface with legal information
Privacy Policy and Terms of Service links
Clean navigation with back button

Image Processing Technology
Pixelation Algorithm
The app uses a block-based pixelation technique that:

Reduces image resolution based on the selected pixel size
Re-enlarges the image without interpolation to create distinct pixel blocks
Maintains aspect ratio and image boundaries

8-Bit Color Reduction
For authentic retro visuals, the app:

Applies pixelation first to create a blocky appearance
Maps each pixel color to the nearest available color in the selected palette
Uses efficient color distance calculations for optimal performance
Processes images in the background with progress tracking

User Experience

Intuitive workflow: select → adjust → apply → save
Immediate visual feedback when adjusting parameters
Smooth transitions between screens
Error handling with user-friendly messages
Responsive design adapting to different screen sizes

Technical Implementation Highlights

Optimized bitmap processing for better performance on mobile devices
Background thread processing to keep UI responsive
Efficient memory management for handling large images
Modern Jetpack Compose UI implementation with reusable components
Clean separation between UI and image processing logic

Pixel Master transforms ordinary photos into nostalgic pixel art with authentic retro aesthetics, offering a perfect balance of simplicity and powerful features for both casual users and pixel art enthusiasts.