Codestream Atlas IMI · zen-codestream-trace/0

Theme

1Choose an encoded IMI file

Optional: encode an IMI filein your browser (WASI engine in a worker)

Presets:

Source Fixture or your PNG channels sample widening significant bits

Mode lossy lossless quick effort column groups unit ordinals

Lossy quality color entropy decode speed compact streams stripe block rows AQ gamma plane 1 plane 2 plane 3

Quick (exact, QOI-style packets) bit smarts

Lossless stripe rows lanes palette

Representationoutput format vs what the payload codes

2Byte map & timeline scrubber

Scrub decode byte offset:100%

3Explore 3D syntax layers & technique Exploded 3D layers over the image plane show each coding stage (DC base, ordinal/transform/palette maps, MSB/LSB smart-bit byte planes, and rANS/SplitHuf entropy streams). Hover or click any 3D layer.

Syntax tree

Image plane · 3D syntax

Field sheet

4Decode timing

Generated with cargo run --release -p imij --features lab --example codestream_trace -- FILE.imi --rgba OUT. Self-checks: every child lies inside its parent, leaves tile the file without overlap, and any unattributed bytes are listed. In 3D, bar height is the bits per pixel each record spends on its region; DC records sit under the AC layer. Drag to orbit, scroll to zoom.

◀ Syntax tree

Image plane · 3D syntax 3D pixels bits/px blocks

Field sheet ▶

4Decode timingTime in this browser

Syntax tree

Image plane · 3D syntax

Field sheet

4Decode timing