Measure chromatic aberration at slanted edges using Imatest eSFR chart
measures the chromatic aberration at all slanted edge regions of interest (ROIs) of
an Imatest® Extended eSFR chart [1].aberrationTable
= measureChromaticAberration(chart
)
measures the chromatic aberration with additional parameters to specify a subset of
ROIs to measure.aberrationTable
= measureChromaticAberration(chart
,Name,Value
)
Chromatic aberration is best measured at slanted edges that are:
Roughly orthogonal to the line connecting the center of the image and the center of the ROI
Farthest from the center of the image
Because chromatic aberration increases radially from the center of the image, measurements at slanted edges near the center of the image can be ignored.
The absolute chromatic aberration reported in the
aberration
field is measured in the horizontal or
vertical direction. However, chromatic aberration is a radial phenomenon, and
radial measurements are more accurate.
[1] Imatest. "Esfr". http://www.imatest.com/mathworks/esfr/.