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how to create vision contrast test system in MATLAB?

Asked by OLGA Jumbo Sanchez on 23 Mar 2018
Latest activity Edited by OLGA Jumbo Sanchez on 23 Mar 2018
Anyone have any idea how I can create this chart? I am using cosine functions with different frequencies and plotting them over a 2D grid. However, I do not know how to get the exact same contrast as the original chart
x = linspace(- .5 * pi, .5* pi, rows);
y = linspace(1, 100, rows);
[xx,~] = meshgrid(x, y);
z = L(i) .* (C(i) .* cos(2 .* pi .* freq .* xx) + 1);
where L is the luminance and C the contrast. If you know a better way, It'd be great to learn it.

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