An apparatus and method of processing shoot artifacts of an image signal
includes a maximum gradient value calculation part to set a window of a
predetermined size based on a current pixel of an input image signal and
to calculate a maximum gradient value based on values of pixels in the
window, a limit value calculation part to calculate a limit value
corresponding to the maximum gradient value, a dilation amount
calculation part to calculate a dilation amount corresponding to the
current pixel based on the calculated limit value and a pixel difference
between the current pixel neighboring pixels of the current pixel, and a
pixel value conversion part to add a current pixel value to a value
obtained by multiplying the calculated dilation amount by a predetermined
gain value.