JPEG 1.00 bit/pixel
JPEG2000 1.00 bit/pixel
JPEG 0.50 bit/pixel
JPEG2000 0.50 bit/pixel
JPEG 0.25 bit/pixel
JPEG2000 0.25 bit/pixel
Examples of the basic performance of JPEG2000 relative to JPEG. The selected image is a scene from the NITF test suite that is highly stressing for many image compression algorithms. The image quality produced by the two algorithms at 1 bit per pixel is similar. For many images, JPEG2000 generally provides slightly better image quality than JPEG when the compressed rates are 1–2 bits per pixel. At 0.5 bits per pixel, the JPEG2000 image is a distinct improvement, particularly with respect to the transform block boundaries that appear in JPEG. At 0.25 bits per pixel, the JPEG image begins to look like a mosaic, whereas JPEG2000 provides a more gracefully degrading blur across the scene. The improvement doesn't come free, however; JPEG2000 implementation is roughly 3–10 times more complex than JPEG.
JPEG 1.00 bit/pixel | JPEG2000 1.00 bit/pixel |
JPEG 0.50 bit/pixel | JPEG2000 0.50 bit/pixel |
JPEG 0.25 bit/pixel | JPEG2000 0.25 bit/pixel |