dmd -m64 rez.d color.d png.d

rez [options]

--read-png <image path> [minimum luminance] [maximum luminance] [first luminance] [last luminance] : read an image in PNG format
--binarize <minimum luminance> : binarize the image
--trace <maximum luminance distance> <mask definition> ... : trace the lines
--vectorize <minimum luminance> <maximum position distance> : vectorize the edges
--write-png <image path> [pixel color] : write the image in PNG format
--write-svg <drawing path> [line width] [line color] : write the edges in SVG format
--write-obj <mesh path> [pixel size] [edge height] : write the edges in OBJ format

<image path|width.height>@[maximum bad pixel count]:[rotation count]/[rotation angle]

rez --read-png test.png 64 255 255 0 --trace 128 4.12@3:2 --write-png OUT/test.png

rez --read-png test.png --vectorize 128 0.5 --write-svg OUT/test.svg 1 --write-obj OUT/test.obj 0.01 2.5