BMP vs FITS
Ein detaillierter Vergleich von BMP Image und FITS Astronomical Image — Dateigröße, Qualität, Kompatibilität und welches je nach Workflow zu wählen ist.
BMP Image
Raster & Vector ImagesBMP is an uncompressed raster image format native to Windows. Files are large but preserve exact pixel data with no compression artifacts. Rarely used on the web due to file size.
Über BMP-DateienFITS Astronomical Image
Raster & Vector ImagesFITS (Flexible Image Transport System) is the standard digital file format in astronomy for storing images, tables, and metadata from telescopes and satellites. It supports multi-dimensional arrays and extensive header metadata for scientific observation records.
Über FITS-DateienVorteilsvergleich
BMP Vorteile
- Dead-simple format — trivially easy to read and write.
- Lossless and uncompressed — perfect bit-exact pixel storage.
- Universally supported in Windows applications since 1985.
- Supports 1, 4, 8, 16, 24, and 32-bit color depths.
FITS Vorteile
- Self-documenting — every file carries complete observational metadata.
- Lossless — bit-exact storage of detector readouts.
- Stable since 1981 with zero breaking changes.
- Mandatory for professional astronomy — every research publication uses it.
- Open standard endorsed by IAU.
Einschränkungen
BMP Einschränkungen
- Enormous file sizes — no meaningful compression in typical use.
- Not a web format — browsers support it but nobody serves BMPs over HTTP.
- No metadata support (no EXIF, no ICC profile in practice).
- Multiple header versions mean "a BMP" is ambiguous — parsers must handle several variants.
FITS Einschränkungen
- Niche — used almost exclusively in astronomy.
- File sizes are large (no default compression).
- Not a display format outside specialized viewers (DS9, AstroBin).
- Consumer imaging apps don't understand FITS.
Technische Spezifikationen
| Spezifikation | BMP | FITS |
|---|---|---|
| MIME type | image/bmp | image/fits |
| Extensions | .bmp, .dib | .fits, .fit, .fts |
| Compression | None (typical); RLE 4/8 bit (rare) | — |
| Color depths | 1, 4, 8, 16, 24, 32 bits per pixel | — |
| Byte order | Little-endian | — |
| Standard | — | IAU-endorsed FITS 4.0 (latest revision) |
| Header records | — | 80-character ASCII cards |
| Encoding | — | IEEE big-endian integers and floats |
Typische Dateigrößen
BMP
- Small icon (32×32) 4 KB
- Screenshot (1920×1080) ~6 MB
- 4K image (3840×2160) ~25 MB
- Scanned A4 at 300 dpi ~25 MB
FITS
- Backyard-telescope CCD shot (5 MP) 10-30 MB
- Hubble WFC3 single exposure ~65 MB
- JWST NIRCam full detector ~650 MB
Bereit zum Umwandeln?
Wandle zwischen BMP und FITS online um, kostenlos und ohne Installation. Verschlüsselter Upload, automatische Löschung in 60 Minuten.
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Häufig gestellte Fragen
BMP (Bitmap) is a raster image Format developed by Microsoft für Windows. It stores images mit no Komprimierung by default, resulting in large Dateigrößes aber pixel-perfect quality. It has been part von Windows since version 1.0.
FITS (FITS Astronomical Image) is an image Format used to store raster graphics — a two-dimensional grid von pixels describing a picture. It is part des raster & vector images family und designed around a specific trade-off between Dateigröße, visual fidelity, und feature support (transparency, colour depth, Komprimierung type). Photographers, web designers, und content creators choose FITS when its particular strengths match the publishing target.
BMP Dateien öffnen in Windows Paint, Photos, macOS Preview, GIMP, Photoshop, und virtually any image viewer. All Windows Anwendungen support BMP natively.
Most desktop photo viewers (Windows Photos, macOS Preview, GIMP, Photoshop, Affinity Photo) öffnen FITS natively. On mobile, iOS Photos und Google Photos display FITS im gallery when unterstützt by the OS. If the Format is rare oder new, umwandeln to JPG oder PNG first — both are universellly readable — using our FITS to JPG oder FITS to PNG converter.
PNG is besser als BMP in almost every scenario since it bietet verlustfrei Komprimierung (smaller files), Transparenz support, und wider cross-platform use. BMP is mainly relevant für legacy Windows Anwendungen.
Upload the FITS to KaijuConverter und pick a target Format (JPG, PNG, WebP, HEIC, TIFF, BMP, SVG, PDF). The conversion runs in der Browser via ImageMagick und returns a herunterladen in seconds. No account oder installation required; both input und output delete automatically within two hours.