Measure noise using Imatest eSFR chart
measures the noise levels using the gray regions of interest (ROIs) of an
Imatest® Extended eSFR chart [1].noiseTable
= measureNoise(chart
)
To linearize data for noise measurements, first undo the gamma correction of
an sRGB test chart image by using the rgb2lin
function. Then, create an esfrChart
object from the linear image, and input the esfrChart
object
to the measureNoise
function.
[1] Imatest. "Esfr". http://www.imatest.com/mathworks/esfr/.