cherab.phix.observer.fast_camera.colour.spectrum_to_phantom_rgb#
- cherab.phix.observer.fast_camera.colour.spectrum_to_phantom_rgb(spectrum, resampled_rgb=None, exposure_time=1.0, pixel_area=1.0)#
Calculate a tuple of R, G, B values from an input spectrum based on Phantom Hight-speed camera.
The conversion equation from Spectral Power \(P(\lambda)\) [W/nm] to degital number DN [12bit] is represented as follows:
\[DN = \frac{t}{6.15\times 10^{-9} A_{1\text{px}}}\int_{\mathbb{R}} \mathrm{d}\lambda\; S(\lambda)P(\lambda)\]where,
\(A_{1\text{px}}\) : 1 pixel area (in m$^2$)
\(S(\lambda)\) : spectral response at a specific wavelength (in A/W)
\(t\) : exposure time (in second)
\(DN\) : sensor response (in digital number, 12bits, from 0-4095)
- Parameters:
spectrum (Spectrum) – raysect spectrum object (in radiance)
resampled_rgb (memoryview) – Pre-calculated RGB sensitivity curves optimised for this spectral range, by default None
exposure_time (float, optional) – exposure time of camera shutter (in [sec]), by default 1.0
pixel_area (float, optional) – pixel area capturing light (in m$^2$), by default 1.0
- Returns:
R, G, B degital value in 12bit including over 4095 value
- Return type: