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BMP at a glance
BMP
Bitmap and device-independent bitmap structures became part of the Windows graphics story early in the platform's life, which is why BMP still appears in older desktop workflows and low-friction image interchange tasks.
CRW at a glance
CRW
Early Canon digital-camera workflows used raw formats like CRW before the later EOS raw families stabilized around CR2 and then CR3.
Format comparison
| Feature | BMP | CRW |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 1990 | 2000 |
| Inventor | Microsoft | Canon |
| Status | active | proprietary |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Not supported |
| Primary use cases |
|
|
| Layer support | Not supported | Not supported |
| Vector scaling | Not supported | Not supported |
| Camera raw data | Not supported | Supported |
| HDR support | Not supported | Not supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use BMP
- Your source file is already in BMP.
- Preserve source expectations before exporting to CRW.
- BMP is commonly used in image workflows.
When to use CRW
- Your target workflow expects CRW.
- Improve delivery compatibility with CRW.
- CRW is commonly used in image workflows.
FAQs
Why convert BMP to CRW?
Convert to CRW when maintaining compatibility with older Canon raw libraries or recovering historical camera originals.
In most current workflows it is a source to preserve or migrate, not a preferred new output format.
What changes when converting BMP to CRW?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to CRW adds camera raw data.
What should I review after converting BMP to CRW?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.