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A preview appears here after you choose an image.
Image / Local tool
Halftone Image Maker
Build a monochrome dot-screen pattern whose cell coverage follows local average luminance. Processing stays in this browser, the original file is never uploaded, and exported pixels contain no source metadata.
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Analysis report
◎ Images are never uploaded; Canvas re-encodes exports without original metadata.
Result
A preview appears here after you choose an image.
Method, example & boundaries
Halftone Image Maker: from input to a reviewable result
Render a monochrome dot-screen image whose local dot coverage follows source luminance. A selectable cell size controls the visual frequency, making the page useful for a printable graphic treatment or for learning how brightness becomes dot area.
Worked example: 1200×800 image with 8 px cells
- Example input
- Source 1200×800; dot cell size 8 px.
- Example output
A 1200×800 monochrome PNG evaluated across approximately 150×100 cells.
How to interpret it
Darker cells receive larger black dots and lighter cells smaller ones; the output canvas keeps the source pixel dimensions.
Luminance-to-area rendering
Canvas pixels are sampled by square cells, converted to local average luminance, and mapped inversely to a centered black-dot radius. The browser draws the complete screen locally and exports the rendered canvas.
Print and sampling boundaries
- The effect is a raster simulation, not a press-ready vector halftone or separations file.
- Small cells increase processing cost and can create moiré after resizing.
- The export is monochrome and does not perform CMYK screen-angle control.
Anonymous feedback
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