SPRUJB3 March 2024 AM67 , AM67A , TDA4AEN-Q1 , TDA4VEN-Q1
Figure 7-51 shows the local image intensity to noise threshold T_n mapping via the 12-segment interpolated lookup. Twelve sets of (X, Y, S), S = slope, are provided per curve, one set per color plane, with the first X coordinate fixed at zero.
The slopes should be implemented with signed value, as some image sensors might require higher noise threshold at the low intensity range than high intensity range.