Sigma X3F to PNG Converter
Process Sigma Foveon direct image sensor X3F raw captures into true-color, lossless PNG graphics.
Format Comparison & Technical Specifications
| Specification | X3F | PNG |
|---|---|---|
| MIME Type | - | image/png |
| Type | - | raster |
| Compression | - | lossless (DEFLATE / LZ77 + Huffman) |
| Standard Specification | - | W3C PNG 3rd Edition |
| Magic Bytes Header | - | 89 50 4E 47 0D 0A 1A 0A |
Format Overview & Applications
Sigma digital cameras-including the SD Quattro, SD1 Merrill, DP Merrill, and classic DP series-feature the revolutionary Foveon X3 direct image sensor. Unlike conventional Bayer sensors that filter one color per pixel location, Foveon sensors employ three vertical layers of silicon (blue, green, red) to capture 100% full-color data at every single pixel location. Converting X3F to lossless PNG preserves every nuance of this true-color sensor output without introducing the discrete cosine transform (DCT) artifacts or chroma subsampling of JPEG.
Technical Specifications & Codec Breakdown
The converter reads Sigma X3F container chunks, extracts the three vertical sensor planes, computes layer color matrix transformations, maps high dynamic range color responses into sRGB, and compresses the true-color raster into a lossless PNG stream.
OS & Browser Compatibility
Compatible with Adobe Photoshop, Figma, After Effects, DaVinci Resolve, Affinity Photo, and all modern web browsers.
Useful info
Because Foveon sensors deliver true 1:1 color per pixel without Bayer blur, exporting to PNG preserves unparalleled micro-contrast in architectural and macro photography.
Format Comparison & Technical Specifications
A 45 MB Sigma SD Quattro H X3F raw capture converts into an ultra-sharp 56 MB lossless PNG master plate in approximately 490 ms.
Frequently Asked Questions
How does the Foveon X3 sensor differ from standard camera sensors?
Foveon sensors capture red, green, and blue light at every pixel site using three vertical silicon layers, eliminating Bayer color interpolation.
Why is PNG critical for Sigma X3F conversion?
PNG is lossless, ensuring the exceptional pixel-level sharpness and chromatic detail of Foveon sensors are not blurred by JPEG compression.
Do I need Sigma Photo Pro installed?
No. Our LibRaw WebAssembly engine processes Sigma Foveon raw captures directly inside your web browser.