HTJ2K Progressive Decoder

Real-time resolution-based progressive decoding demonstration

How HTJ2K Progressive Decoding Works:

Resolution Levels: Decode 1/8 → 1/4 → 1/2 → Full resolution
Sharp Previews: Each level shows a sharp, complete image at lower resolution
Efficient: Get a preview with only 5-10% of the file data
Fast: HTJ2K decodes 10-20x faster than standard JPEG 2000

📁 Choose HTJ2K File

Image Information:

Upload an HTJ2K file to see progressive decoding in action

✓ Progressive Decoding IS Supported

HTJ2K supports multi-resolution decoding through OpenJPH. You can display lower resolutions first, then progressively enhance the image. This provides superior user experience compared to waiting for the entire file.

Core Implementation Code:Load OpenJPH: await fetch('openjphjs.js')
Decode 1/8 res: OpenJPH.decode({data, reduce: 3})
Decode 1/4 res: OpenJPH.decode({data, reduce: 2})
Decode 1/2 res: OpenJPH.decode({data, reduce: 1})
Decode full: OpenJPH.decode({data, reduce: 0})