Some display measurement tasks with imaging light measurement devices (LMDs) require evaluation of the target quantity (e.g. luminance) exactly over the dimension of individual pixels, single lines or columns of the display under test (DUT). This can be achieved, in the case of high image sampling ratios, by application of moving window average (MWA) filtering for which we introduce a novel method of adjusting window parameters (i.e. kernel coefficients) to effectively and completely remove unwanted periodic modulations even at low sampling ratios.