Tracking

"vision/correlation" defines functions to find correlation between window-image and tracking-image.

  tracking-window [class]

 :super B<>pixel-image

:slots 		 x-pos y-pos x-vel y-vel

		pattern-size window-size

		x-win y-win window window-margin

		update threshold half-pattern correlation

• This class defines tracking window.

  :correlation [method]

• returns correlation between window-image and this image.

  :grab &optional (x x-pos) (y y-pos) (sampling 2) [method]

• grabs video image and returns grabbed pixel-image.

  :window-rectangle val [method]

• draws rectangle on xwindow.

  :rectangle val [method]

• draws rectangle on xwindow.

  :move newpos &aux (newx (aref newpos 0)) (newy (aref newpos 1)) [method]

• moves tracking-window to newpos and grabs video image.

  :track display-window &optional th [method]

• tracks this image from window image.

  :search display-window &optional th [method]

• searches this image from window image.

  :track-and-search flag &optional th [method]

• tracks this image. If mistake tracking, searches this image from window image.

  :pos [method]

• returns up-left position of window.

  :vel [method]

• returns tracking velocity.

  :insidep pos &aux (x (aref pos 0)) (y (aref pos 1)) [method]

• checks pos that is contained with tracking window.

  :update &optional (flag :get) [method]

• sets flag as update. if flag doesn't exist, returns update.

  :prin1 strm &rest mesg [method]

• prints this tracking-window object with its name and dimensions.

  :init x y size win-size [method]

• creates tracking-window object and sets slots.