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- % ppd2distance.m
- %
- % This function convert pixels per degree to a pair of two distances for a
- % monitor based experiment. It takes as input the distance from the monitor and
- % returns the second dimension
- %
- % input:
- % ppd - pixels per degree
- % pixNum - number of pixels
- % distance - distance from monitor. This can be any number since the system is
- % underdetermined
- %
- % output:
- % monitorDim - monitor size for the provided data
- function monitorDim = ppd2distance(ppd, pixNum, distance)
- thetaDeg = pixNum / ppd;
- thetaRad = thetaDeg * pi / 180;
- monitorDim = 2 * distance * tan(thetaRad / 2);
- end
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