406cc7c0c7
Add S-expression based video effects pipeline with modular effect definitions, constructs, and recipe files. Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
23 lines
927 B
Common Lisp
23 lines
927 B
Common Lisp
;; Outline effect - shows only edges
|
|
;; @param thickness int [1, 10] default 2
|
|
;; @param threshold int [20, 300] default 100
|
|
;; @param color list default (0 0 0)
|
|
;; @param fill_mode string default "original"
|
|
|
|
(define-effect outline
|
|
((thickness 2) (threshold 100) (color (list 0 0 0)) (fill_mode "original"))
|
|
(let* ((edge-img (edges frame (/ threshold 2) threshold))
|
|
(dilated (if (> thickness 1)
|
|
(dilate edge-img thickness)
|
|
edge-img))
|
|
(base (cond
|
|
((= fill_mode "original") (copy frame))
|
|
((= fill_mode "white") (make-image (width frame) (height frame) (list 255 255 255)))
|
|
(else (make-image (width frame) (height frame) (list 0 0 0))))))
|
|
(map-pixels base
|
|
(lambda (x y c)
|
|
(let ((edge-val (luminance (pixel dilated x y))))
|
|
(if (> edge-val 128)
|
|
color
|
|
c))))))
|