  We present a readout scheme for CMOS image sensors that can be used to
achieve arbitrarily high dynamic range (HDR) in principle. The linear full well
capacity (LFWC) in high signal regions was extended 50 times from 20 ke$^{-}$
to 984 ke$^{-}$ via an interlaced row-wise readout order, whilst the noise
floor remained unchanged in low signal regions, resulting in a 34 dB increase
in DR. The peak signal-to-noise ratio (PSNR) is increased in a continuous
fashion from 43 dB to 60 dB. This was achieved by summing user-selected rows
which were read out multiple times. Centroiding uncertainties were lowered when
template-fitting a projected pattern, compared to the standard readout scheme.
Example applications are aimed at scientific imaging due to the linearity and
PSNR increase.
