Overview: JPEG XL Compression WG-04 Bill Wallace

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Overview: JPEG XL Compression WG-04 Bill Wallace Radical Imaging Co-Chair of WG-27: DICOMweb Problems with Existing Compression Single-bit overlay for SEG and scanned documents needs a good format Existing colour compression formats are

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01
Overview: JPEG XL Compression WG-04 Bill Wallace
Radical Imaging
Co-Chair of WG-27: DICOMweb<br>
02
Problems with Existing Compression Single-bit overlay for SEG and scanned documents needs a good format
Existing colour compression formats are insufficient
PNG is quite slow and inefficient for DICOMweb usage
GIF is lossy, and generally not usable for medical images
JPEG is lossy only, 8 bit only, but is quite fast
JPEG-2000 is lossy and lossless is quite slow, not well supported
JPEG-LS and JPEG-Lossless do not support colour effectively
Support for multi-channel lossy and lossless encoding is becoming important WG-27 DICOMweb 2<br>
03
JPEG XL as a format Free to use/implement
Standard format
Compresses slightly better than JPEG for lossy images
Compresses about the same as JPEG-2000 for lossless images
Fast image decompression, similar to JPEG-LS
Multiple color transfer functions
Many channels, up to 32 bits, as well as float channels
Single bit encoding
Includes multi-frame encoding WG-27 DICOMweb 3<br>