**Why / shareable event:** each is a small, satisfying add; collectively a "6 new filters" update post. **Scope (one checkbox each)** - [ ] `levels=in_black:in_white:gamma:out_black:out_white` - [ ] `curves` (a few presets to start) - [ ] `posterize=levels` - [ ] `dither` (ordered/Floyd–Steinberg) - [ ] `vignette[=strength]` - [ ] `autocontrast` (stretch to full range) **Notes:** keep the filtergraph syntax consistent with existing filters; add each to `-filters` + README.
Why / shareable event: each is a small, satisfying add; collectively a "6 new filters" update post.
Scope (one checkbox each)
levels=in_black:in_white:gamma:out_black:out_whitecurves(a few presets to start)posterize=levelsdither(ordered/Floyd–Steinberg)vignette[=strength]autocontrast(stretch to full range)Notes: keep the filtergraph syntax consistent with existing filters; add each to
-filters+ README.