ESF Evaluation
An operator defines a box area encompassing the edge of a knife-edge test target image back-illuminated by a blackbody. The box area is defined to be approximately 10% of the total frame area. The image pixel data is translated into a two-dimensional array (pixel intensity and pixel position). The amplitude (pixel intensity) of each line within the array is normalized and averaged. This yields the edge spread function (ESF)
where
- ESF = the output array of normalized pixel intensity data
- = the input array of pixel intensity data
- = the ith element of
- = the average value of the pixel intensity data
- = the standard deviation of the pixel intensity data
- = number of pixels used in average
Read more about this topic: Modulation Transfer Function (infrared Imaging)
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