Image MIME Reference
EDMICS-RLC
Fuji Xerox EDMICS-RLC
image/vnd.fujixerox.edmics-rlc
VS
JPEG 2000 Codestream
image/j2c
J2C
A complete technical comparison of Fuji Xerox EDMICS-RLC and JPEG 2000 Codestream — covering compression, feature support, browser compatibility, magic bytes, and when to choose each format.
Equal browser support
Feature Support
| Feature | EDMICS-RLC | J2C |
|---|---|---|
| Transparency (Alpha) | ✕ No | Yes |
| Animation Support | ✕ No | ✕ No |
| Progressive Loading | ✕ No | Yes |
| HDR Support | ✕ No | Yes |
| EXIF Metadata | ✕ No | ✕ No |
| ICC Color Profile | ✕ No | ✕ No |
Fuji Xerox EDMICS-RLC
image/vnd.fujixerox.edmics-rlc
Extension
.rlc.edm
Container
Fuji Xerox EDMICS Wrapper
Compression
Run-Length Coding (RLC / RLE)
Algorithm
Run-Length Coding (RLC)
Color Depth
1-bit (Monochrome), 8-bit (Grayscale)
Developed by
Fuji Xerox Co., Ltd.
Released
1990s
Magic Bytes
Unknown (Proprietary Container)
JPEG 2000 Codestream
image/j2c
Extension
.j2c.j2k.jpc
Container
None (Raw Bitstream)
Compression
JPEG 2000 (Discrete Wavelet Transform) / Lossless / Lossy
Algorithm
Discrete Wavelet Transform (DWT)
Color Depth
8-bit, 10-bit, 12-bit, 16-bit (Per Channel)
Developed by
Joint Photographic Experts Group (JPEG)
Released
2000
Magic Bytes
FF 4F FF 51
Browser Support Comparison
| Browser | EDMICS-RLC | J2C |
|---|---|---|
Chrome
|
✕ | ✕ |
Firefox
|
✕ | ✕ |
Safari
|
✕ | ✕ |
Edge
|
✕ | ✕ |
IE (Legacy)
|
✕ | ✕ |
EDMICS-RLC
EDMICS-RLC Strengths
- Simple, computationally inexpensive Run-Length Coding enabled rapid compression and decompression on low-power legacy hardware
- Deeply integrated into Fuji Xerox enterprise hardware for seamless, automated scan-to-archive workflows
Limitations
- Completely proprietary and closed-source, making modern archival extraction and migration extremely difficult
- No support in modern image processing libraries like ImageMagick, libvips, or standard viewers without bespoke decoding tools
- RLC compression is far less efficient than modern algorithms like PNG (Deflate) for complex documents
J2C
J2C Strengths
- Provides state-of-the-art wavelet compression for high-end professional workflows (Digital Cinema)
- Allows for highly efficient progressive decoding (by resolution or quality layer) natively within the stream
- Supports lossless mathematical compression and high bit-depths (up to 16-bit per channel) natively
Limitations
- Lacks a standard container to store color space info or metadata, requiring external systems (like MXF or DICOM) to map colors correctly
- Extremely computationally expensive to encode and decode compared to standard DCT-based JPEG
- Zero web browser support
When to choose which format
EDMICS-RLC
Use EDMICS-RLC when…
- Fuji Xerox EDMICS Enterprise Systems
- Archival of Scanned Engineering Documents
- Legacy Corporate Scanning Pipelines
J2C
Use J2C when…
- Digital Cinema Packages (DCP)
- Medical Imaging (DICOM Payloads)
- Professional Broadcast and Archiving
- Embedded Hardware Encoding