sensorSNRluxsec

Graph  sensor SNR (dB) as a function of  illuminance (lux-sec)

      [snr,luxsec] = sensorSNRluxsec(ISA)

  If no arguments are returned, this routine produces a graphical output
  of the SNR for each of the different color types.  The snr and luxsec
  data are stored in get(gcf,'userdata').  If there are output arguments,
  no graph is produced.

  This routine calculates SNR assuming an uniform scene and optical image
  with no cos4th fall-off.  This scene is then processed with the current
  sensor parameters at a variety of integration times.  The resulting SNR
  as a function produces a plot of SNR vs. lux-sec.

  The formula for SNR is described in sensorSNR.  This routine uses the
  relationship between pixel volts and illumination, calculated by
  pixelVperLuxSec, to represent the SNR in terms of lux-sec.

  Unlike sensorSNR, this routine does not return the limits imposed by the
  various types of noise terms.

  See also:  sensorSNR, pixelVperLuxSec

 Example:
    sensorSNRluxsec(vcGetObject('sensor'));

 Copyright ImagEval Consultants, LLC, 2005.