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XPM at a glance
XPM
Before today's relatively small set of mainstream consumer image formats dominated everyday use, desktop software, workstations, GUI systems, and early graphics tools produced many specialized raster formats with local importance.
BPG at a glance
BPG
BPG arrived in the mid-2010s when image engineers were looking for better post-JPEG compression before AVIF and JPEG XL had ecosystem momentum.
Format comparison
| Feature | XPM | BPG |
|---|---|---|
| File type | Image | Image |
| Extensions |
|
|
| MIME type |
|
|
| Compression / quality | depends | depends |
| File size characteristics | medium | medium |
| Compatibility | broad | broad |
| Editability | moderate | moderate |
| Created year | 1989 | 2014 |
| Inventor | Daniel Dardailler, Colas Nahaboo (Groupe Bull) | Fabrice Bellard |
| Status | legacy | active |
| Transparency | Not supported | Not supported |
| Animation | Not supported | Supported |
| Primary use cases |
|
|
| Common software |
|
|
| Archival suitability | moderate | moderate |
| Metadata handling | moderate | moderate |
| Delivery profile | strong | strong |
| Workflow fit | delivery | delivery |
| Layer support | Not supported | Not supported |
| Vector scaling | Not supported | Not supported |
| Camera raw data | Not supported | Not supported |
| HDR support | Not supported | Supported |
| Streaming ready | Not supported | Not supported |
When to use each format
When to use XPM
- capture ingest
- editing
- web or print delivery
- Important for long-tail compatibility and archival conversion.
When to use BPG
- capture ingest
- editing
- web or print delivery
- Higher compression efficiency than legacy JPEG in many cases.
FAQs
Why convert XPM to BPG?
Choose BPG as target when high-efficiency image encoding for maximum compression at JPEG-class quality, image compression research, and specialized pipelines where HEVC infrastructure is available.
What changes when converting XPM to BPG?
High-efficiency image encoding for maximum compression at JPEG-class quality, image compression research, and specialized pipelines where HEVC infrastructure is available.
What should I review after converting XPM to BPG?
After conversion, review these destination checks: Open converted output in ImageMagick and verify behavior on real samples; Compare output against the expected depends quality profile; Never achieved the browser, device, or platform support needed for mainstream adoption.
How can I keep quality stable in XPM to BPG conversion?
Run representative samples, keep settings deterministic, and monitor these risks: Strong HEVC lineage complicated the format's practical ecosystem story; Never achieved the browser, device, or platform support needed for mainstream adoption; Validate destination compatibility before large-batch conversion.