Does anyone know of any disadvantages in saving processed images in the
Photoshop .PNG format?
I just worked on an image I want to keep at the best possible quality, and
compared the various file sizes as follows ( file is a 30cm x 20 cm 16-bit
RGB image in sRGB):
PSD file size is 303 MB
TIF-ZIP file size is 285 MB
TIF-NONE file size is 310 MB
TIF-LZW file size is 379 MB
PNG file size is 218 MB
These are considerable variations in the volume of data stored: all saves
after the first conversion from .PEF (saved as .PSD) were then taken from
the .PSD file, and I am concerned that image degradation will be permanently
saved! Although, of course, I can always go back to the .PEF file, and a
print from the PNG file looks fine.
All advice gratefully received - and followed!
John Coyle
Brisbane, Australia
