Mosaic mire for measuring number of pixels with different contrast and colors to test e.g. optical device, has cells defined by concentric logarithmic spirals and/or pole radius, and colored in pairs using black, weight and gray colors

摘要

The mire has elementary cells arranged in uniform, where cells exhibit different dimensions. The cells are defined by appropriate concentric logarithmic spirals, pole radius, circular arcs and/or axle of curves so that the cells converge to a regular polygon in terms of shape and surface area. The cells are contrastly colored in pairs using black, weight and gray colors. The cell pairs are combined in groups according to contrast levels. The cell groups are numbered according to dimensions.