The Universal Image Sequence Merger & Action Composite Studio is a browser-based computational photography utility engineered for photographers, astrophotographers, athletes, and digital creators. Designed to run completely inside your local browser using HTML5 Canvas (2DContext / OffscreenCanvas) and 32-bit floating-point accumulation buffers (Float32Array), it ingests sequential burst photos (up to 120+ frames) and fuses them across five computational blending topologies with zero server uploads and zero privacy risks.
Whether you want to isolate a moving skater or athlete into a multi-frame Action Strobe trajectory, connect night sky exposures into seamless Continuous Star Trails, soften rough ocean waves using Arithmetic Mean, erase passing pedestrians and tourists using Temporal Median Filtering, or fuse shallow macro slices into an extended depth-of-field (EDOF) image via $3\times3$ Laplacian Gradient Sharpness, the studio delivers professional darkroom capabilities directly in your web browser. Features include automatic translational drift stabilization, exposure equalization, interactive keyframe timeline scrubbing, selective subject brush masking, 60 FPS split-screen comparison, difference heatmaps, 4K rendering, 1-click clipboard copying, and zero-dependency in-memory batch PKZIP packager.
Universal Image Sequence Merger & Action Studio
Fuse high-speed burst sequences into action strobes, generate silky long-exposure water, merge star trails, and focus-stack macro photographs with 100% client-side privacy.
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Action Strobe (Chronophotography): Extracts moving subjects across sequential bursts by calculating the per-pixel luminance difference $|I_k(x, y) - I_{\text{base}}(x, y)|$ against an anchor frame. If the delta exceeds threshold $\tau$, the moving figure is isolated and stamped onto the unified composite.
Maximum Intensity Projection (Star Trails): Evaluates $P_{\text{out}}(x, y) = \max(I_1(x, y), \dots, I_N(x, y))$, accumulating specular points of light while preserving deep cosmic sky contrast. With comet-tail decay enabled, exponential opacity decay yields tapered meteor-trail shapes.
Temporal Median vs. Arithmetic Mean (Tourist Removal & Silky Water): Arithmetic mean averages pixel values over $N$ frames to blur running water and moving clouds. Conversely, statistical median sorting extracts the immutable, non-moving architectural background, stripping away pedestrians and cars without manual healing brushes.
Focus Stacking & Depth Fusion: Computes the discrete $3 \times 3$ Laplacian high-frequency gradient sharpness scores for every focal plane. The highest local gradient energy is extracted to assemble an extended depth-of-field (EDOF) macro photograph.
100% Client-Side Privacy: All pixel manipulations, 32-bit floating-point accumulation buffers, and image exports occur exclusively inside your local browser memory. Zero images are ever uploaded to any web server.