Original test image

Flat (box) filter

Tent filter

Quadratic filter

Cubic filter

Gauss filter

Mitchell filter

Catmul Rom filter

Gamma corrected Flat (box) filter

Gamma corrected Tent filter

Gamma corrected Quadratic filter

Gamma corrected Cubic filter

Gamma corrected Gauss filter

Gamma corrected Mitchell filter

Gamma corrected Catmul Rom filter

Circle Bokeh + Gamma corrected Flat (box) filter

Circle Bokeh + Gamma corrected Tent filter

Circle Bokeh + Gamma corrected Quadratic filter

Circle Bokeh + Gamma corrected Cubic filter

Circle Bokeh + Gamma corrected Gauss filter

Circle Bokeh + Gamma corrected Mitchell filter

Circle Bokeh + Gamma corrected Catmul Rom filter

To compare: Circle Bokeh Flat (box) filter, without gamma