Software; Vi. Software; Lens Aberration Correction Function - Canon EOS 1Ds Mark III White Paper

Lens Aberration Correction
Function

VI. SOFTWARE

EOS Digital Solution Disk Ver.16 will ship with the EOS-1Ds Mark III camera at no additional
cost. Each component is modified to bring EOS-1Ds Mark III compatibility to such things
as RAW and sRAW files, as well as metadata.
The new EOS Utility, ver.2.2, has 2 enhancements to Live View Function, a Test Shooting
function and a Quick Preview function. Both are discussed in the Live View Function
section of this paper.
DPP (Digital Photo Professional) is upgraded from version 3.1 to 3.2. The 2 main additions
are the lens aberration correction function and the brightness warning display function.
While lens optics are designed to achieve the best possible balance in minimizing
different types of aberrations and defects, these do remain, even if only minimally, as in
reality it is impossible to eliminate aberrations completely. The new "Lens Aberration
Correction Function" provides correction by way of image processing to handle divergences
from ideal imaging.
Aberration correction is achieved by re-processing the image, combining the following
information with the photographed RAW image:
1) The optical data for the lens:
The DPP software includes data containing lens IDs and optical characteristics of
each lens
2) Lens information for the lens used (lens ID):
Automatically recorded to the supplementary information for photographed RAW images
3) The focal length information when shots are taken:
Automatically recorded to the supplementary information for photographed RAW images
4) The distance information when shots are taken:
Automatically recorded to the supplementary information for photographed RAW images.
Note: some of the specifications for recording the supplementary RAW image information in 2), 3) and 4) vary
depending on the EOS Digital camera used.
There are 4 factors that this function can correct:
1) Peripheral illumination:
Corrects peripheral light, which declines as one moves away from the center of the
image, by increasing brightness at the image periphery so that brightness is uniform
over the entire image
VI. SOFTWARE 25