VI. SOFTWARE 25
LensAberration Correction
Function
EOSDigital Solution Disk Ver.16 willship with the EOS-1Ds Mark III camera at no additional
cost. Each componentis modified to bring EOS-1Ds Mark III compatibility to such things
asRAW and sRAW files, as well as metadata.
The new EOSUtility, ver.2.2, has 2 enhancements to Live View Function, a TestShooting
function and a QuickPreview function. Both are discussed in the Live View Function
section of thispaper.
DPP (DigitalPhoto Professional) is upgraded from version 3.1 to 3.2. The 2 main additions
are the lensaberration correction function and the brightness warning display function.
While lensoptics are designed to achieve the best possible balance in minimizing
different types of aberrationsand defects, these do remain, even if only minimally, as in
realityit is impossible to eliminate aberrations completely. The new “Lens Aberration
Correction Function” providescorrection by way of image processing to handle divergences
from idealimaging.
Aberration correction isachieved by re-processing the image, combining the following
information with the photographed RAWimage:
1)The optical data for the lens:
The DPP software includesdata containing lens IDs and optical characteristics of
each lens
2)Lens information for the lens used (lens ID):
Automaticallyrecorded to the supplementary information for photographed RAW images
3)The focal length information when shots are taken:
Automaticallyrecorded to the supplementary information for photographed RAW images
4)The distance information when shots are taken:
Automaticallyrecorded to the supplementary information for photographed RAW images.
Note: some ofthe specifications for recording the supplementary RAW image information in 2), 3) and 4) vary
dependingon the EOSDigital camera used.
Thereare4factorsthat this function can correct:
1) Peripheralillumination:
Correctsperipheral light, which declines as one moves away from the center of the
image, byincreasing brightness at the image periphery so that brightness is uniform
over the entire image
VI. SOFTWARE