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Image MIME Reference
JPEG-AI-Sequence

JPEG AI Image Sequence

image/jais
VS

Kodak Digital Camera Raw

image/x-kodak-dcr
Kodak-DCR

A complete technical comparison of JPEG AI Image Sequence and Kodak Digital Camera Raw — covering compression, feature support, browser compatibility, magic bytes, and when to choose each format.

Equal browser support

Feature Support

Feature JPEG-AI-Sequence Kodak-DCR
Transparency (Alpha) Yes ✕ No
Animation Support Yes ✕ No
Progressive Loading Yes ✕ No
HDR Support Yes Yes
EXIF Metadata Yes Yes
ICC Color Profile Yes Yes
JPEG AI Image Sequence
image/jais
Extension
.jais
Container ISOBMFF / HEIF Image Sequence
Compression Lossy (Variational Autoencoder / Neural Network)
Algorithm
Deep Neural Network (Variational Autoencoder with Hyperpriors)
Color Depth 8-bit, 10-bit, 12-bit, 16-bit, Wide-gamut & HDR
Developed by Joint Photographic Experts Group (ISO/IEC JTC 1 / ITU-T)
Released 2025
Magic Bytes
.. .. .. .. 66 74 79 70 6A 61 69 73 (Size + ftypjais)
Full JPEG-AI-Sequence reference →
Kodak Digital Camera Raw
image/x-kodak-dcr
Extension
.dcr
Container TIFF/EP
Compression Uncompressed / Lossless JPEG
Algorithm
NoneLossless JPEG (ITU-T81)
Color Depth 12-bit (Per Channel)
Developed by Eastman Kodak Company
Released 1998
Magic Bytes
49 49 2A 00 or 4D 4D 00 2A
Full Kodak-DCR reference →

Browser Support Comparison

Browser JPEG-AI-Sequence Kodak-DCR
Chrome Chrome
✕ ✕
Firefox Firefox
✕ ✕
Safari Safari
✕ ✕
Edge Edge
✕ ✕
IE IE (Legacy)
✕ ✕
JPEG-AI-Sequence

JPEG-AI-Sequence Strengths

  • Extends the state-of-the-art compression efficiency of JPEG AI to multi-frame image sequences and short animations
  • Allows machine vision algorithms to process temporal sequences (like surveillance bursts) directly in the compressed latent domain, saving immense computational power
  • Utilizes the robust, industry-standard ISOBMFF container for metadata, timing, and multi-track encapsulation
Limitations
  • Lacks native decoding support in current web browsers, operating systems, and video players
  • Decoding neural-network-compressed sequences requires significant compute overhead on hardware lacking dedicated AI accelerators (NPUs/GPUs)
  • Adoption is hindered by competition with established sequence formats like AVIF, HEVC (HEICS), and modern video codecs
Kodak-DCR

Kodak-DCR Strengths

  • Preserves the full dynamic range and uncompressed raw sensor data captured by foundational professional digital cameras
  • Utilizes the standard TIFF container structure, ensuring that open-source decoders like LibRaw can easily parse and interpret the files long after official vendor support has ended
Limitations
  • Completely obsolete proprietary format tied to camera hardware that is no longer manufactured
  • Shares the TIFF magic header, leading to widespread misidentification by automated MIME detection libraries
  • Cannot be natively viewed in web browsers or standard operating system image viewers without specialized codecs

When to choose which format

JPEG-AI-Sequence
Use JPEG-AI-Sequence when…
  • Machine Vision and AI Video/Burst Workflows
  • Cloud Storage Animation Optimization
  • Focal Stacks and Medical Volumetric Slices
  • Visual Surveillance Sequences
Kodak-DCR
Use Kodak-DCR when…
  • Vintage Professional Digital Photography (Kodak DCS series)
  • Non-destructive Image Post-Processing
  • Raw Imaging Archival

More comparisons

JPEG-AI-Sequence vs ACES → Kodak-DCR vs ACES → JPEG-AI-Sequence vs APNG → Kodak-DCR vs APNG → JPEG-AI-Sequence vs AVCI → Kodak-DCR vs AVCI → JPEG-AI-Sequence vs AVCS → Kodak-DCR vs AVCS → JPEG-AI-Sequence vs AVIF → Kodak-DCR vs AVIF → All comparisons →
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