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function init()
return 1 -- Number of channels to output
end
function process()
local d1 = 0.754
local d2 = -2.265
local adj = 0.003
for x = 0, rgb_output:width() - 1, 1 do
for y = 0, rgb_output:height() - 1, 1 do
local ch23_8 = get_calibrated_value(0, x, y, true)
local ch31_4 = get_calibrated_value(1, x, y, true)
local centerPixel = x - rgb_output:width() / 2
local theta = (centerPixel / rgb_output:width() * 98) * math.pi / 180
local d0 = 8.24 - 2.622*math.cos(theta) + 1.846 * (math.cos(theta))^2
local result = math.cos(theta)*(d0+d1*math.log(285 - ch23_8)+c2*math.log(285-ch31_4))+c3
local output = result / 300
set_img_out(0, x, y, output)
end
set_progress(x, rgb_output:width())
end
end
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