大津の閾値判別法 (ql:quickload :iterate) (ql:quickload :lispbuilder-sdl) (ql:quickload :lispbuilder-sdl-gfx) (use-package :iterate) (defclass <data> () ((max :initform (error "max must specified") :reader data-max :initarg :max) (min :initform (</data>…