findLEDContrasts: Calculate LED contrasts

In huchzi/flickerbox: Functions for creating stimuli and analyzing results for a 4-channel-LED-stimulator

Description

Calculates the LED contrast that result in a pursued contrast at the photoreceptor level, given certain time-averaged LED illuminances and given cone fundamentals.

Usage

findLEDContrasts(pursuedContr, lmean, ConeFund, maxContrast = T)

Arguments

lmean	time-averaged luminances of the LEDs
ConeFund	cone funamentals to be used
maxContrast	use the maximal contrasts at the photoreceptor levels that can be achieved technically while keeping the contrast ratios from pursuedContrast constant?
pursuedContrast	the contrast in the photoreceptors that should be achieved

Value

LED contrasts that result in the desired contrasts at the photoreceptor level

Examples

## Not run: 
#### set given values
## mean luminance of primaries
lmean <- c(red = 20, green = 40, blue = 3, cyan = 20)
## create M-cone isolating stimlui
pursuedContr <- c(rod = 0, scone = 0, mcone = 20, lcone = 0)
## Find LED contrast that result in pursued contrasts
LEDcontrast100 <- findLEDContrasts(pursuedContr, lmean, ConeFund)
# Calculate the maximal photoreceptor contrast this results in
maxContrast <- findPhotoreceptorContrasts(LEDcontrast100, lmean, ConeFund)
createPresetFile("mcone", "außen", LEDcontrast100, c(20, 40, 3, 20), lmean)

## End(Not run)

huchzi/flickerbox documentation built on May 24, 2020, 9:55 a.m.