Microsoft photo standard comes into focus

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Made some errors in the table. Corrections.

              {JPEG}    {PNG}     {JPEG2000}{JPEG XR}
LossLess      NO        YES       Option    Option
True Color    YES       Option    Yes       Yes
Small size    Yes*      Yes**     Yes*      Yes*
1-bit/color   No        Yes       No        Yes
2-bit/4-bit   No        Yes       No        ???
8-bit pallet  No        Yes       No        ???
8-bit gray    Yes       Yes       Yes       ???
8-bit color   Yes       Yes^      Yes       Yes
12-Bit        No        No        No        Yes
16-bit        Yes       Yes^      Yes       Yes
32-bit        No        ???^      ???       Yes
Transparency  No        Yes       Yes       ???
Alpha channel No        Yes       No        ???
Gamma Data    No        Yes       Yes       Yes
Color Data    No        Yes       Yes       Yes
Exif Data     Yes       No***     Yes       Yes
Extensible    No        Yes       Yes       Yes
Patent Free   Yes****   Yes       Yes****   Yes*****
Ubiquitous    Yes       Yes       No        N/A

* File size controlled by level of lossy compression.
** File size controlled by compression filters applied (Application software dependent on creation, independent during rendering).
*** Exif data stored through text annotation and not true exif metadata
**** Any patented technology without a work around has patent agreements signed and/or royalty pre-paid.
***** Royalty-free promise from MS.

^Bit/color does not include Alpha channel so an 8-bit/color image (24-bit color depth) with alpha becomes a 32-bit color depth image and a 16-bit/color image (48-bit color depth) with alpha becomes a 64-bit color depth image.

Posted by: Logics   Posted on: 08/01/07 You are currently: a Guest | Members login | Terms of Use

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