PNG vs SGI
Una comparativa detallada de PNG Image y SGI Image — tamaño de archivo, calidad, compatibilidad y cuál elegir según tu flujo de trabajo.
PNG Image
Raster & Vector ImagesPNG is a lossless image format that supports transparency. It is ideal for graphics, logos, screenshots, and any image where preserving exact pixel data is important.
Sobre los archivos PNGSGI Image
Raster & Vector ImagesSGI (Silicon Graphics Image) is a raster image format developed by Silicon Graphics for use on their IRIX workstations. It supports both uncompressed and RLE-compressed storage with up to 4 channels including alpha.
Sobre los archivos SGIComparativa de ventajas
PNG Ventajas
- Lossless compression — every save preserves the original pixels perfectly.
- Full 8-bit alpha channel for smooth transparency.
- Excellent for text, UI screenshots, logos, and line art.
- Royalty-free and an ISO standard (ISO/IEC 15948).
- Supports 16-bit color depth for high-fidelity work.
SGI Ventajas
- Historic VFX pipeline format.
- 16-bit channel support.
- RLE compression.
- ImageMagick compatibility.
Limitaciones
PNG Limitaciones
- Much larger than JPEG for photographs (no perceptual compression).
- No native animation in most software (APNG support is inconsistent).
- No CMYK support — web and screen only, not print.
- Metadata capabilities are less rich than JPEG's EXIF.
SGI Limitaciones
- Legacy — SGI Inc. is gone.
- Superseded by OpenEXR/DPX in film.
- Niche tooling.
Especificaciones técnicas
| Especificación | PNG | SGI |
|---|---|---|
| MIME type | image/png | image/x-sgi |
| Compression | Lossless — DEFLATE (zlib) | None or RLE |
| Color depth | 1, 2, 4, 8 or 16 bits per channel | — |
| Max dimensions | 2^31 − 1 pixels per side (2.1 billion) | — |
| Transparency | Full 8-bit alpha channel | — |
| Standard | ISO/IEC 15948:2004 | — |
| Extensions | — | .sgi, .rgb, .rgba |
| Bit depth | — | 8 or 16 bits per channel |
Tamaños típicos de archivo
PNG
- Icon or small logo 2–20 KB
- UI screenshot (1920×1080) 200–800 KB
- High-res photo (12 MP) 10–30 MB
- Print-ready illustration 5–50 MB
SGI
- 1080p 8-bit SGI frame 4-8 MB
- 4K 16-bit SGI 50-100 MB
¿Listo para convertir?
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Preguntas frecuentes
PNG (Portable Network Graphics) is a lossless raster image format created in 1996 as a patent-free alternative to GIF. It supports transparency, making it ideal for logos, icons, and web graphics.
PNG (Portable Network Graphics) is a sem perdas raster image formato created in 1996 como um patent-free alternative to GIF. It suporta transparência, making it ideal para logos, icons, e web graphics.
PNG files open natively in all modern operating systems, web browsers, and image editors including Photoshop, GIMP, Paint.NET, and Canva.
PNG arquivos abrir natively in all moderno operating systems, web browsers, e image editors including Photoshop, GIMP, Paint.NET, e Canva.
WebP offers 26% smaller file sizes than PNG with equivalent quality. Use WebP for web delivery when browser support is sufficient. Use PNG when maximum compatibility or professional editing workflows are needed.
WebP oferece 26% smaller tamanho do arquivos than PNG com equivalent quality. usar WebP para web delivery when browser support is sufficient. usar PNG when máximo compatibilidade ou profissional editando workflows are needed.