Compute the signal current at each pixel position
signalCurrentImage = signalCurrent(opticalImage,ISA,wBarHandles)
The signal current is computed from the optical image (OI) and the image
sensor array properties (ISA). The units returned are charge/pixel/sec.
This is a key routine called by sensorComputeImage and sensorCompute.
The routine can compute the current in either the default spatial
resolution mode (1 spatial sample per pixel) or in a high-resolution
made in which the pixel is modeled as a grid of sub-pixels and we
integrate the spectral irradiance field across this grid, weighting it
for the light intensity and the pixel.
The default or high-resolution mode computation is governed by the
nSamplesPerPixel parameter in the sensor
sensorGet(sensor,'nSamplesPerPixel');
The default mode has a value of 1. High resolution modes can be
computed with sensor = sensorSet(sensor,'nSamplesPerPixel',5) or some
other value. If 5 is chosen, then there is a 5x5 grid placed over the
pixel to account for spatial sampling.
wBar is the handle to the waitbar image.
Copyright ImagEval Consultants, LLC, 2003.