@lylejk your idea gave me ideas!
Perhaps a ‘sprite cloud’ or shape average could do this, G’MIC indeed has the means. But what if we use convolution instead?
example_shapecloud : -check ${-is_image_arg\ $1}" && isval(${2=9})"
-repeat $! -pass$1 0 -l[$>,-1]
kw={$2+1-$2%2} r. $kw,$kw,1,1,5 n. 0,1
+gt[0,1] 0 convolve[-2] [-1] -rm.
convolve[0] [1] rm[1] +eq. 0 +[-2,-1] /
-endl -done
Given this, we can continue as follows:
example_staroutline : skip ${1=0.2},${2=11}
normalize[-1] 0,255
blur[-1] 2
isophotes[-1] 6
100%,100%,1,1
noise[-1] 0.5,1
lt[-1] {$1-0.5}
mul[-1,-2]
shape_star ,
example_shapecloud[-2] [-1],$2
rm[-1]
And the output:
