BMP vs CR3
Um comparativo detalhado de BMP Image e Canon RAW CR3 — tamanho de arquivo, qualidade, compatibilidade e qual escolher de acordo com seu fluxo de trabalho.
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.
Sobre os arquivos BMPCanon RAW CR3
Raster & Vector ImagesCR3 is the newer Canon RAW format used in EOS R mirrorless cameras and newer DSLRs. It offers improved compression and image quality over CR2.
Sobre os arquivos CR3Comparativo 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.
CR3 Vantagens
- Modern ISO Base Media File Format container.
- Supports lossless + compressed C-RAW in the same extension.
- Preserves every pixel of Canon mirrorless sensors.
- Compatible with Canon's cross-camera pipeline (DPP, Cinema EOS).
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.
CR3 Limitações
- Proprietary — no public spec.
- Third-party support is always playing catch-up with each new body.
- Older Canon processing software (DPP 4) does not read CR3.
- File sizes remain large — 45+ MB per shot on flagship bodies.
Especificações técnicas
| Especificação | BMP | CR3 |
|---|---|---|
| MIME type | image/bmp | image/x-canon-cr3 |
| Extensions | .bmp, .dib | — |
| Compression | None (typical); RLE 4/8 bit (rare) | — |
| Color depths | 1, 4, 8, 16, 24, 32 bits per pixel | — |
| Byte order | Little-endian | — |
| Extension | — | .cr3 |
| Container | — | ISO Base Media File Format (ISOBMFF) |
| Variants | — | CRAW (lossless), C-RAW (lossy compressed) |
| Predecessor | — | .cr2 (2004-2018) |
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
CR3
- 24 MP CR3 lossless (R6, M50) 30-40 MB
- 45 MP CR3 lossless (R5) 45-60 MB
- 45 MP C-RAW compressed 25-35 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.