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→Theory: Replaced a text version mathematical expression with a Latex expression for a clear view. |
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:<math>I(x_i,y_i) = \int\!\!\int O(u,v) ~ \mathrm{PSF}(x_i/M-u , y_i/M-v) \, du\, dv</math>
in which <math display="inline">\mbox{PSF}(x_i/M-u,y_i/M-v)</math> is the image of the impulse function
The 2D impulse function may be regarded as the limit (as side dimension ''w'' tends to zero) of the "square post" function, shown in the figure below.
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