Estimate RAW file size from sensor resolution and bit depth, with typical compression ratios for common camera formats.
未计压缩与元数据开销。
| Item | Formula / Rule | Source / Standard |
|---|---|---|
| Bit depth cost | Uncompressed storage costs bit depth ÷ 8 bytes per pixel, so 14 bit takes 1.75 bytes | ISO 12234-2:2001 Electronic still-picture imaging — TIFF/EP |
| Lossless compression | Lossless compression typically saves 30% to 50%, varying with noise and scene complexity | Adobe DNG Specification, 1.6 |
| Embedded payload | Embedded JPEG previews and sensor calibration data add roughly 1 to 3 MB | Adobe DNG Specification, 1.6 |