Photo Editor

This tool provides a focused, in-browser workspace to annotate photos with drawing tools. It targets marketers, designers, educators, photographers, social media managers, and content creators who need to convey ideas on images quickly. Users upload or link a photo, apply strokes, and share annotated visuals without requiring a desktop editor. The workflow is designed for rapid feedback loops, visual briefs, and broadcast-ready previews. Distinguishing factors include a compact feature set that preserves the original image via a non-destructive layer, straightforward export options, and consistent rendering across common formats.
Core Logic & Features: The system supports image input (upload or URL), multiple drawing tools (freehand brush, straight line, arrow, rectangle, ellipse), color picker, stroke thickness, and opacity. Annotations are stored as a separate layer, enabling undo/redo, reordering, and selective visibility. Core outputs are raster exports (PNG, JPEG) and vector-friendly options (SVG) where available; optional JSON stroke logs allow downstream repeatable edits. Required: image input, tool selection, and final export; Optional/advanced: text annotations, precise alignment guides, and batch-ready export signals via API.
Inputs & Outputs: Input schemas include image (binary or URL), tool type, color in hex or rgb, thickness in pixels, and alpha (0–100). Validate image types (PNG, JPEG, WEBP) and size ceilings (e.g., 100 MB). Outputs include annotated image file(s) and metadata about strokes (timestamp, tool, color, thickness, positions) if supported.
Algorithms & Calculations: Stroke rendering uses a 2D canvas with anti-aliased strokes; coordinates map to image pixels; layering keeps the annotation above the base image; export logic rasterizes to PNG/JPEG or encodes strokes in SVG/JSON. No AI-based editing or content generation is performed.
Error & Edge Cases: Invalid input formats, oversized images, network failure on URL fetch, or unsupported export formats must produce deterministic validation errors; unsaved work should be recoverable within a session; extremely large canvases may require downscaling or streaming processing.
Industry/Region & Localization: Coordinates use pixels; color values use sRGB; exports adhere to common standards; language support focuses on English UI messages; no currency or region-specific formatting is required.
Assumptions & Exclusions: The tool provides basic on-photo drawing and overlays, not full on-photo retouching, cloning, or color grading; batch editing is out of scope unless explicitly extended via an API; the tool does not modify the original image beyond annotations during export.