BMP vs SGI — Differences, File Size & When to Use Each

BMP vs SGI

Um comparativo detalhado de BMP Image e SGI Image — tamanho de arquivo, qualidade, compatibilidade e qual escolher de acordo com seu fluxo de trabalho.

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BMP

BMP Image

Raster & Vector Images

BMP 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.

Sobre os arquivos BMP

SGI

SGI Image

Raster & Vector Images

SGI (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 os arquivos SGI

Comparativo de vantagens

BMP Vantagens

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.

SGI Vantagens

Historic VFX pipeline format.
16-bit channel support.
RLE compression.
ImageMagick compatibility.

Limitações

BMP Limitações

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.

SGI Limitações

Legacy — SGI Inc. is gone.
Superseded by OpenEXR/DPX in film.
Niche tooling.

Especificações técnicas

Especificação	BMP	SGI
MIME type	image/bmp	image/x-sgi
Extensions	.bmp, .dib	.sgi, .rgb, .rgba
Compression	None (typical); RLE 4/8 bit (rare)	None or RLE
Color depths	1, 4, 8, 16, 24, 32 bits per pixel	—
Byte order	Little-endian	—
Bit depth	—	8 or 16 bits per channel

Tamanhos típicos de arquivo

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

SGI

1080p 8-bit SGI frame 4-8 MB
4K 16-bit SGI 50-100 MB

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Perguntas frequentes

BMP (Bitmap) is a raster image format developed by Microsoft for Windows. It stores images with no compression by default, resulting in large file sizes but pixel-perfect quality. It has been part of Windows since version 1.0.

BMP (Bitmap) is a raster image formato developed by Microsoft para Windows. It stores images com no compressão by default, resulting in large tamanho do arquivos mas pixel-perfect quality. It has been part of Windows since version 1.0.

BMP files open in Windows Paint, Photos, macOS Preview, GIMP, Photoshop, and virtually any image viewer. All Windows applications support BMP natively.

BMP arquivos abrir in Windows Paint, Photos, macOS Preview, GIMP, Photoshop, e virtually any image viewer. All Windows aplicativos support BMP natively.

PNG is better than BMP in almost every scenario since it provides lossless compression (smaller files), transparency support, and wider cross-platform use. BMP is mainly relevant for legacy Windows applications.

PNG is melhor que BMP in almost every scenario since it fornece sem perdas compressão (smaller files), transparência support, e wider cross-platform use. BMP is mainly relevant para legacy Windows aplicativos.