Improve the Luminosity

As you probably noticed, the image you obtained after demosaicing is quite dark. Apply a gamma correction $$ I suggest $\backslash$gamma $=0\mathrm{.}3,$ and not to normalize using np$.$min and np$.$max but np$.$percentile with values of $0\mathrm{.}01$ and $99\mathrm{.}99.$

Evaluate at least one other curve than y $=$ x$\backslash$gamma $.$

Hint: use the percentiles to normalize data in $[0,1]$ as you would normally do with min and max $($set negative values to $0,$ and values greater than $1$ to $1),$ apply the gamma correction, and invert the transform to get back the the previous range of values.

Hint: here is how to use the percentile approach:

a $=$ np$.$percentile$($data$,0\mathrm{.}01)$

b $=$ np$.$percentile$($data$,99\mathrm{.}99)$

data $=($data $-$ a$)/($b$-$a$)$

data$[$data$<0]=0$

data$[$data$>1]=1$