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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.
ICB at a glance
ICB
The Truevision line grew out of EPICenter-era PC graphics boards, and several board names ended up surviving as filename extensions even when the underlying raster structure stayed close to the wider TGA family.
Format comparison
| Feature | CRW | ICB |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Created year | 2000 | 1991 |
| Inventor | Canon | Truevision |
| Status | proprietary | active |
| 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 | Supported | Not supported |
| HDR support | Not supported | Not supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use CRW
- Your source file is already in CRW.
- Preserve source expectations before exporting to ICB.
- CRW is commonly used in image workflows.
When to use ICB
- Your target workflow expects ICB.
- Improve delivery compatibility with ICB.
- ICB is commonly used in image workflows.
FAQs
Why convert CRW to ICB?
Convert to ICB when recovering historical raster assets from Truevision-era systems or normalizing old image archives before moving them into PNG, TIFF, or another contemporary format.
It is mainly a compatibility target for legacy graphics collections.
What changes when converting CRW to ICB?
This conversion changes how the format behaves in downstream tools and delivery environments.
Moving to ICB removes camera raw data.
What should I review after converting CRW to ICB?
Validate output quality on representative files and confirm the target format behaves correctly in the destination workflow.