# Dithering and Effects Basics

Overview of visual effects and algorithms available in the application.

## Short Summary

This page explains the different visual algorithms and effects you can apply to your images, videos, and 3D scenes.

## Core Concepts

- **Dithering**: Creating the illusion of color depth by using patterns of available colors. Useful for retro aesthetics and limited color palettes.
- **Color quantization**: Reducing the number of colors in an image to match a specific palette.
- **Real-time processing**: All effects update instantly as you adjust parameters.

## Available Algorithms

### CRT

Simulates old CRT monitor effects with scanlines, curvature, RGB shift, and phosphor glow. Includes VHS distortion options for retro video aesthetics.

### Bayer Dithering

Ordered dithering using Bayer matrices (2x2, 4x4, 8x8). Creates characteristic tiling patterns. Adjustable color levels, scale, contrast, and optional blue noise.

### Pixel Dithering

Creates large pixel blocks for a pixelated appearance. Adjustable block size and color quantization.

### Floyd-Steinberg (2D only)

Error diffusion dithering that preserves detail well. Works only with 2D images. Adjustable error diffusion strength and color levels.

### System 84

Vintage computer aesthetic inspired by classic systems. Dithering with pattern-based effects and adjustable vignette.

### ASCII

Converts images to text-based art using characters. Four styles available:

- **Classic**: Traditional ASCII with standard character sets.
- **Duotone**: Two-color ASCII art.
- **Box Drawing**: Uses box-drawing characters for geometric patterns.
- **Sentence**: Uses custom text to form the image.

### Frequency Modulation

Applies frequency modulation by varying a signal's instantaneous frequency over time, rather than leaving it constant.

### Grid Glyph

Grid-based character rendering with customizable glyphs.

### Grid Lights

Creates a grid of light points, simulating LED displays.

### Blob Track (Video only)

Tracks moving areas in video and displays blob IDs and tracking information.

### YOLO Track (Video only)

Real-time object detection and tracking in video using the YOLO model. Displays object labels and bounding boxes.

### Pixel Sort (2D only)

Sorts pixels based on brightness or hue along specific angles. Creates glitch-art style effects. Works only with 2D images.

## Choosing an Algorithm

- For retro computer/TV look: Use CRT or System 84.
- For limited color palettes: Use Bayer Dithering or Floyd-Steinberg.
- For text-based art: Use ASCII with the style that fits your needs.
- For video analysis: Use Blob Track or YOLO Track.
- For creative glitch effects: Use Pixel Sort.

* * *

See [overview](/content/docs/overview/index.html) for detailed parameter explanations.