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Image MIME Reference
JPEG-2000

JPEG 2000 Core Image File

image/jp2
VS

PaintShop Pro Image

image/x-paintshoppro
PaintShop-Pro-PSP

A complete technical comparison of JPEG 2000 Core Image File and PaintShop Pro Image — covering compression, feature support, browser compatibility, magic bytes, and when to choose each format.

JPEG-2000 wins on browser support

Feature Support

Feature JPEG-2000 PaintShop-Pro-PSP
Transparency (Alpha) Yes Yes
Animation Support ✕ No ✕ No
Progressive Loading Yes ✕ No
HDR Support Yes Yes
EXIF Metadata Yes Yes
ICC Color Profile Yes Yes
JPEG 2000 Core Image File
image/jp2
Extension
.jp2.j2k.jpf.jpx.jpm
Container JP2 (ISO/IEC 15444-1)
Compression Lossy / Lossless
Algorithm
Discrete Wavelet Transform (DWT)
Color Depth 8-bit, 16-bit, 32-bit, 38-bit
Developed by Joint Photographic Experts Group
Released 2000
Magic Bytes
00 00 00 0C 6A 50 20 20 0D 0A 87 0A
Full JPEG-2000 reference →
PaintShop Pro Image
image/x-paintshoppro
Extension
.psp.pspimage.tub.pat
Container PSP Chunk-based Format
Compression Uncompressed / RLE (Run-Length Encoding) / LZ77
Algorithm
RLELZ77
Color Depth 8-bit (Indexed), 16-bit (Grayscale), 24-bit (RGB), 32-bit (RGBA), 48-bit (High Color)
Developed by Jasc Software / Corel Corporation (Alludo)
Released 1990
Magic Bytes
7E 42 4B 00
Full PaintShop-Pro-PSP reference →

Browser Support Comparison

Browser JPEG-2000 PaintShop-Pro-PSP
Chrome Chrome
✕ ✕
Firefox Firefox
✕ ✕
Safari Safari
✓ 5+
 ✕
Edge Edge
✕ ✕
IE IE (Legacy)
✕ ✕
JPEG-2000

JPEG-2000 Strengths

  • Superior compression efficiency over baseline JPEG without introducing blocking artifacts
  • True mathematically lossless compression available in the same format
  • Extremely scalable: a single file can be decoded at various resolutions (thumbnails to full size) without loading the entire file
Limitations
  • Very poor native web browser support prevents it from being a web standard
  • High computational complexity makes encoding and decoding significantly slower than JPEG
  • Early patent concerns and complex licensing hindered its initial adoption rate
PaintShop-Pro-PSP

PaintShop-Pro-PSP Strengths

  • Provides robust, non-destructive editing capabilities with full support for vector layers, adjustment layers, and layer blend modes
  • Historically offered a highly capable and affordable alternative to Adobe Photoshop's PSD format for Windows users
  • Features proprietary support for 'Picture Tubes' (.tub), a unique brush technology that paints sequential or random raster objects along a path
Limitations
  • Deeply proprietary format tied exclusively to the Corel/Alludo ecosystem
  • Third-party software support (like GIMP or ImageMagick) is often limited to parsing older .psp files, frequently failing to render complex layers in modern .pspimage files
  • No support in modern web browsers; must be exported to a flattened web format (JPEG/PNG) for online viewing

When to choose which format

JPEG-2000
Use JPEG-2000 when…
  • Digital Cinema (DCP)
  • Medical Imaging (DICOM)
  • Geospatial Data
  • Archival Preservation
PaintShop-Pro-PSP
Use PaintShop-Pro-PSP when…
  • PaintShop Pro Multi-layer Project Archival
  • Digital Art and Photo Retouching
  • Picture Tubes (.tub) and Custom Patterns (.pat)

More comparisons

JPEG-2000 vs ACES → PaintShop-Pro-PSP vs ACES → JPEG-2000 vs APNG → PaintShop-Pro-PSP vs APNG → JPEG-2000 vs AVCI → PaintShop-Pro-PSP vs AVCI → JPEG-2000 vs AVCS → PaintShop-Pro-PSP vs AVCS → JPEG-2000 vs AVIF → PaintShop-Pro-PSP vs AVIF → All comparisons →
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